Category Archives: COMPUTER NETWORKS

What are Anti-Virus Servers

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Antivirus Servers

Before discussing the antivirus servers, just take a little view of antivirus. Basically, viruses can be one of the major dangerous threats to an organization, lost important data and taking computer systems out of order.

Antivirus for Windows Servers defends information on servers operating under Microsoft Windows from every kind of malicious application. This invention was planned specially for high-performance business servers that experience intense loads.

Antivirus Server version presents the most dominant security to overcome virus bugs on your server or servers. It provides facility equally as primary security of a file server itself, and, through its discretionary plug-ins, as security for different server subsystems, for instance electronic mail and firewall or proxy. Different security measures are offered for these servers:

  1. SMTP Server
  2. MS Exchange Server 2000/2003/2007
  3. MS Proxy/ISA Server
  4. Lotus Domino Server
  5. MS Sharepoint Server (including Office Sharepoint Server 2007)

 

Integration with the Operating System

Different antivirus server version has been completely experienced with all versions of Windows Servers (opening with NT 4.0 and till at Windows Server 2008, as well as Windows Storage Server 2003 and Windows Datacenter Server 2008). It is completely optimized to take benefit of numerous computer systems and has been pressure tested still on machines with a great amount of processors to confirm outstanding strength and scalability of its machinery.

Extraordinary concern has been taken to make sure 100% compatibility with superior server machinery such as the volume shadow copy or VSS and file replication services or FRS, assuring that your server will work perfectly under every situation.

User Interface

Although the Server version holds both the user environments of antivirus, straightforward and improved in server practice typically the improved user interface will be in use (not including for the terminal server). The improved user interface provides you access to all the working of antivirus, therefore making it achievable to entirely configure it for broad scanning.

The most important principle is supposed “antivirus task” based examining. Initially, you describe the tasks used to scan for viruses, as well as the ordinary parameters. Then, you work on these tasks (possibly occasionally). Each task creates various outcomes; certainly, you can work with these outcomes afterwards. Resident safety is also a particular kind of task.

An additional quality, strongly linked with tasks, is the Scheduler. It makes it achievable to plan the set up of a particular task, both one-time and occasionally.

 

Advantages

Antivirus servers have so many advantages; some of them are as following:

  1. Flexible management
  2. Strong performance
  3. Efficient safety
  4. System requirements

 

Strong performance:

A fresh antivirus engine, fill corresponding of server resources, optimized antivirus checking technique and the elimination of trusted practices from scanning, all raise the product’s working and lesser the quantity of computing resources essential to execute antivirus scans.

Positive safety against new viruses:

The fresh antivirus engine offer more efficient safety techniques against spiteful programs. The intelligent analyzer recognizes with a high extent of chances any spiteful character in programs, even if their name is not included in the antivirus record. The function copy the launch of a program in a secluded virtual setting, making it achievable to examine the actions executes by the program and conclude whether it is potentially damaging.

Reliability:

In the happening of a break down or mandatory shutdown the application’s usually restart make sure stable system safety while the diagnostics system conclude the reason of the break down.

Real-time antivirus protection and scanning:

Strong Anti-Virus for Windows Servers examine all records that are opened, used or customized and purify or deletes all contaminated documents. Moreover, doubtful files or a record is isolated in a quarantine region before to experience advance study. The request scans particular region of the system according to a plan or on command.

Advantages of using Fiber Optics Networks

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Fiber Optic cable is becoming more popular instead of copper wires. The reason of its popularity is lying in its efficiency and effectiveness. There are so many advantages of using Fiber Optics cables that they are preferred in commercial and business use.

Higher Data Capacity

Fiber Optics cables are larger in bandwidth so have enough capacity to carry large amount of data. At corporate level where daily so many consignments are supposed to deliver online these fiber optic cables are reliable to perform this task as there bandwidth is very suitable for this type of work.

Swiftness

It is better to use the word swiftness for its speed as they are capable of moving within blink of an eye from one point to another. Fiber Optics cables are the carrier of data in the form of light which is the fastest medium for transmission. This enables the data travels in gigabits rate like a flash of light. Time and space is not a barrier in its travel all along the journey from beginning to the end. You send and you receive no time consumption.

Remoteness

Fiber Optic cables are free from boundaries. It means it does matter how remote the data has to send it reaches within seconds. Now remoteness is not a problem for different branches of the same office you can correspond on the same date and time wherever you are.

Resistant

Fiber Optics cables are good resistors to electric circuit and able to cope with the environmental hindrances and electric flux and still give clear and sharp images and quality voice service. There are no chances of signal dropping or fading in case of any resistance in it travel route.

Attenuation

As copper wires prune to attenuate in case of electrical or environmental hazards, Fiber Optics cables show low attenuate. Even one can offer no loss in case of using Fiber Optics cables because they travel through light medium in a glass tube therefore no or less data loss happens. Data travel in the form of light and so fast that there appear few chances of data loss.

Modality

Modality of Fiber Optic cables is another advantage as we can select the cable according to our demand. Our demand varies in case of data amount. There are two types of Fiber Optics cables one is single mode cable thin even than a human hair is cheaper than multimode cable but carry less amount of data as compared to the later one. However both are costly to deploy as compare to copper wire.

Light Guide

A special phrase ‘Light Guide’ is used to talk about Fiber Optic cables as it guides the data in the form of light from start to end. LED and Laser are the most common examples of these Fiber Optics cables.

Weight

An important characteristic of Fiber Optics cables is its weight. They are not heavy and are therefore preferably used in aircrafts. Applications with Fiber Optics cables are more efficient and easy to carry and port.

No Hazards

Being not offering any interference with electricity there is no chance of sparking and any other mishap similar to electrical applications. Electrical applications are very dangerous to handle as compared to Fiber Optics.

Saver

Saver is the word you can use in either sense for the Fiber Optics cables. They save time, space, money and life. Particularly this characteristic can be attributed to the space saver. Fiber Optics cables are preferred onto copper wires as Fiber Optics cables are capable of carrying different types of data simultaneously in parallel without any interruption. Using Fiber Optics cables instead of so many copper wires is much better.

What are Wireless Sensor Networks

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Administration is very important to run an organization successfully. Fast telecommunication era where shows positive aspects there it brings many negative effects as well. For proper administration different tools have been devised to track, monitor and control the working bodies. Wireless sensor network is one such device. Wireless networking is quite a handy tool to connect different computers remotely at one place. Wireless sensor network is a type of wireless connection spatially as autonomous bodies to work in harmony to perform a specific function.

How Wireless Sensor Networks Work

Wireless Sensor Network mechanism is quite simple and applicable to a variety of fields. It is based on Smaller nodes, controller, radio transceiver, and battery. The key to stimulate the sensor networking is the algorithm sponsor multi-router phenomenon. The system is totally dependent on the nodes and the harmony established between them through proper frequency. These nodes are of different sizes according to the function they perform.

To activate the monitoring / tracking function of these nodes a radio transmitter is attached to forward the information in the form of waves. They are controlled by the microcontroller according to the function and device in which they are used. All the system remains in working condition with the help of energy supply which is in the form of battery. The wireless sensor networks perform function concurrently where nodes are autonomous bodies incorporated in the field spatially for the accurate results. The information transmits through proper channel taking the information collecting it in the form of data and send to the base.

Types of Wireless Sensor Networks

There are broadly speaking two types of wireless sensor networking; physical and environmental. They are used to track and monitor heat, pressure, temperature, vibratory movements, movement or pollution level, sound detection, etc.

Uses of Wireless Sensor Networks

According to their types they are used by different organizations and fields to monitor a specific task. Wireless sensor networks are incorporated at different point to monitor a specific area a common known example is that of military communication either land or water. Major issues which are becoming a possible threat to life are environmental and industrial issues. Wireless sensor networks are doing great job in the relevant fields to sense to temperature for greenhouse gasses and similarly earthquake detectors are implanted to detect the land sliding phenomenon for precautionary measurements.

Pollution is the major problem of today so is the waste of natural resources. There is great danger of finishing the natural reservoirs. Wireless sensor networks are successfully devised to monitor the water and electricity use. They are used to monitor the waste water in the landfill for cleaning process through landfills and water level detection in the domestic and industrial tanks. Similarly they are used to sense the light and help to consume the daylight properly till the evening and detecting the dim light it automatically switches on the light. This is permissible at homes, offices and factories. Machinery health is an important issue to keep the machines in running conditions for a long time. It helps to reduce the need of large labor and cost.

Check and Balance

The checkers who are tracking and monitoring the wireless sensor network can efficiently monitor the circumstance and can take quick action to balance the situation. In this way they protect the system from being destruction.

User Friendly…Target Killer

Wireless sensor networks are a source of profit at one place while loss on the other side. Like from the source point of view they provide data information about the location and places and movements while the information taken about agencies suffers. It means they are quite user friendly and helps to kill the victim.

Wireless Network Limitations – Disadvantages – Drawbacks

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Wireless network technologies are either ad hoc or can be based on an infrastructure. Ad hoc wireless network is connected through any specific infrastructure or any central device operating for it like router. The wireless connections which operate via the use of solid infrastructure are equally faster but less expensive. Another type of wireless connections is called WAP or wireless access point.

On a commercial level many WAP (Wireless Access Point)s are wrapped tighter and are connected to provide wireless signals to commercial areas. There is a major difference between ad hoc wireless connection and WAP (Wireless Access Point). WAP (Wireless Access Point) is a device which allows other wireless devices to connect and transfer signals. Ad hoc systems do not require any central point for operation. AD hoc systems are used for when a wireless signals are needed for smaller geographical area. Adhoc systems provide very fast transfer of data because they are faster than WAP (Wireless Access Point).

Security in Wireless Network Connections

Ad-hoc wireless network signals are not really strong as compared to the wireless connection which uses routers to function properly. Wireless networks incur high cost but are really easy to implant. However the actual challenge comes when we try to secure its signals. Insecure wireless network can be attacked by hackers. Wireless connections are not preferred to the banks and other sensitive departments. Where loss of information means loss of everything. Wireless signals are easy to catch as compared to wired signals. For the safety of reliable transfer of data, still the experts prefer wired connections.

Other Limitations to Wireless Networks

When the wireless signals are transferred they are blocked by the certain obstacles as walls, gates and human beings. The strength of wireless signals depends upon the location; if you’re closer to infrastructure you receive signals. For example if a wireless infrastructure is established in any university campus. Students spread throughout the campus can not access the signals because the strength of signals varies from location to location. In short whole university campus cannot be benefited from the single wireless connection. Wireless signals can be hindered by other electronic devices, the rate of frequency and the height from the ground. The fear of the unauthorized users is the biggest concern for people transferring sensitive information. The reason is that if your wireless internet connection is not secured using internet any unauthorized user can exploit the signals or even hack important information. The use of ad hoc wire less technology requires the use of very expensive personal digital devices or PDAs like black berry, palmtops, laptops and smart phones. The recent up gradation of wireless technologies also require you to improve your knowledge about how to make use of any wireless technology. Though wireless technology is very common but still it is an expensive way of remain connected. Wireless network is relatively less stable and efficient than a wired connection. It operates on the rule, the nearer the faster. Initial setup is complicated. Wireless connection requires the set up of stations. Stations are those transmission mediums which help the wireless system to operate.

Cost associated with wireless network

The cost of establishing wireless network can also be termed as one of its limitations. Any 802.11g router can approximately be an expense of about $25 to $125. Laptop card or PCI card can cost up to $50 to $150. This is not it one may also consider the additional costs associated with wireless connection. For example additional cost of connecting a router to DSL modem. If the router connected to the DSL operates at a distance of 100 meters away then an additional router is attached to receive the signals. The cost of managing and upgrading the wireless network can not be neglected at all.

What is Wireless network – Types – WLAN, WiFi, WMAN & Wireless Technologies

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Introduction to Wireless networks, WLAN, WiFi, WMAN & Wireless Technologies

Wireless networks fetch essential changes to data networking and makes integrated networks an authenticity. Wireless networks is offering a network having no wires because by using wireless network you can connect your computer to a network using radio waves and can move your computer anywhere easily. Wireless network has made a network extremely portable because of digital modulation, adaptive modulation, information compression, and access multiplexing.

In a wireless network you use air as a medium. Wireless networks introduced by IT Consulting group with IEEE certified 802.11b technology. Wireless networks providing you privacy and personal computer security more than before. A Wireless networks presenting flexibility, roaming, high standard and low cost. There are different types of wireless network such as wireless LAN, wireless MAN, and mobile devices network.

Wireless networks working at a highest bandwidth of 11Mbps and 802.11b can be implementing with various products. This technology focusing on frequency-hopping spread spectrum and direct-sequence spread spectrum which have two approaches. DSSS transmit information by divided into small pieces. It is also identified as a chipping code that transmits the data according to a spreading ratio. It is also helpful for signal resist interference and use can easily observe original data and recover damage data while HSS use the bandwidth to split into lots of probable broadcast frequencies. Its performance is generally enhanced and more consistent. There are lots of benefits or wireless networking such as very fast and reliable having long range from 1,000 ft / 305 m and 250 to 400 ft / 76 to 122 m .You can also integrate it into any existing wired-Ethernet networks. Wireless networks offering very high speed of internet and compatible with peer-to-peer mode.

There are different functional parts of a wireless networking such radios base stations and mobile networks are increasing trends for wireless industries. UWB and Bluetooth can be used as personal network. Wireless network now has been a Broadband wireless with great invention of Wi-Fi and WiMAX networks Wireless networks are competent of offering suppleness for an association. Wireless local area networks offer consistent and effectual keys to a number of instant applications therefore at present it is used under numerous diverse platforms such as developed, health care, education, finance, hospitality, airport, and retail.

Types of Wireless Networks

A wireless network joins two or more than two computers by means of communication without using any wires. Wireless Networks utilizes spread-spectrum or OFDM depends on the technology which is using .Wireless network enable a user to move about within a wide coverage area and still be associated to the network. There are different types of wireless networking such as wide area network, local area network and personal area network but the most common are of two.

WLAN (Wireless Local Area Network)

WLANs provide wireless network contact using radio signal instead of traditional network cabling and built by joining a device called AP through which a user converse with the AP using a wireless network. WLAN also network security because it relics an important issue for WLANs. The WEP technology used in WLAN elevate the rank of security. WLANs have expanded well-built status in a different kind of markets during the last seven years and set up to offer wireless connectivity within a limited exposure area which may be a hospital, a university, the airport, health care providers or a gas plant. WLAN is providing highest data-transfer rate with 802.11 terminologies. Today WLANs are fetching more usually recognized as a general-purpose connectivity substitute for a wide array of business customers. WLANs offering various benefit for user such as mobility, condensed Cost-of-Ownership, installation speed and flexibility and scalability. The technology used in WLANs is Spread Spectrum developed by the military offer secure and reliable services. Frequency-hopping spread-spectrum maintains a single logical channel and Direct-Sequence Spread Spectrum offer chip pattern to make it more effective and infrared technology. Wireless LAN adapters are necessary for regular computer platforms. The benefits of WLAN are high Range and coverage, Throughput, Mulitpath Effects, Integrity, Interoperability with Wired Infrastructure, Interoperability with Wireless Infrastructure, Interference and Coexistence, Simplicity and Ease of Use, Security, Cost, Scalability and , Safety which makes a wireless network in real a great platform.

WMAN (Wireless Metropolitan Area Network)

Fast communications of network within the vicinity of a metropolitan area is called WMAN, that put up an entire city or other related geographic area and can span up to 50km. WMAN designed for a larger geographical area than a LAN. The standard of MAN is DQDB which cover up to 30 miles with the speed of 34 Mbit/s to 155 Mbit/s.1t is more common in schools, colleges, and public services support a high-speed network backbone. WMAN is a certified name by the IEEE 802.16 that functioning on Broadband for its wireless metropolitan. WMAN have air interface and a single-carrier scheme intended to activate in the 10-66 GHz spectrum, supports incessantly unreliable transfer levels at many certified frequencies. WMAN opens the door for the creation and Provide high-speed Internet access to business subscribers. It can handle thousands of user stations with prevents collisions and support legacy voice systems, voice over IP, TCP/IP. WMAN offer different applications with different QoS requirements. The technology of WMAN consist of ATM, FDDI, and SMDS. WiMAX is a term used for Wireless metropolitan area network and plinth on the IEEE 802.16.

Wireless Networks usage

As we know that Wireless network is usually related with a telecommunications that works between nodes and executed without the use of wires. The usage of wireless networking increasing day by day because it has influenced significant impact on the world therefore its uses have appreciably grown-up.

  • Radio frequency signals used in a wireless network therefore you can move about and get admittance to the network while you are working an outdoor location.
  • Through Wireless Networks you can send information over the world using satellites and other signals.
  • Now days wireless networks used in emergency services like police department where wireless network utilize to commune significant information speedily.
  • The growth of wireless network increasing both in people and businesses to send and share data swiftly It doesn’t matter be in a small office or across the world.
  • Another vital exercise for wireless networks is as a cheap and fast way to be linked to the Internet in regions especially where telecom transportation is meager and no source for communication.
  • To make use of Wireless Networks you can get access to other network resources like Library Online System because to move your laptop anywhere is not enough difficult now. Wireless networks make easy of file sharing, the use of printer and other documents with high security.

Now the wireless network is in use every where such as hospital, organizations, universities, airports, health care departments, stores, any much more as wireless network make this world a global village in real.

Wireless Internet – Wireless Internet Types

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Wireless Internet

Internet connectivity is possible in two ways; wired internet connectivity and wireless internet connectivity. Wired internet access through cable or DSL modem is no doubt doing its work well. With the initiation of wireless internet ease and itinerant are two most prominent features which make it popular among internet users. You need a router or an access point work as a base for receiving and transmitting Wi-Fi signals to provide you wireless internet.

Wireless Internet Types

We have different types of Wireless Internet available to use in home or office. of A vast canvas for accessing internet connection is satellite. It is the fastest medium for internet connectivity. High-speed download performance is an additional feature. It enables the sending n receiving the required information and data access. But for end user it is very costly as compared to other modes. That’s why a big server is responsible to access wireless internet and transmit to the end users in multiple ways.

Here comes the municipal area network in which in a city different places are covered by adjusting routers at radial distance of Wi-Fi signals hence responsible for internet connectivity. It costs you very cheap even then there is no compromise on quality means you will be benefited by fast connectivity and effective download speed.

Next option is the wireless broadband internet access which comes to the end users in two shapes. One is fixed radio transmission towers antennas receive and transmit WiFi signals. As most of the devices are now having in-built Wi-Fi cards, it helps to support virtual business concept. There is no need of a concrete wall office. You can work from home through your laptop.

Cellular technology has left no difference between a mobile or computer. You can take either work from your mobile. Mobile broadband with wireless internet connection has mobilized the work.

Features of Wireless Internet

  • A very prominent feature of wireless internet is hidden in its name as it provides wireless internet service. Presence of wires in surrounding is a constant threat and an unhygienic environment because cleaning is very difficult from that part of wiring.
  • Mobility is another big advantage of this wireless internet. Home and small business plans are easily carried out through wireless internet. Wireless internet enables you to move from one room and you will not lose internet connection.
  • Hot-spots are prospect feature of wireless internet. Many restaurants, cafes’ and clubs used this wireless internet for catching the attention of prospect customers.
  • Virtual businesses and virtual education concept is based on this wireless internet access.
  • Game consoles feed with wireless internet card are a source of entertainment.

Disadvantages of Wireless Internet

No doubt wireless internet access is an amazing offer whether for home and small business purpose or educational and entertainment purpose yet there are some limitations as well.

  • Bad weather gives poor signals. One can suffer when you are in dire need of internet connectivity and weather won’t allow you to connect.
  • If your wireless internet connection is not security-enable, you would suffer in the form of data loss. Spying is a constant threat if computer is not firewall protected.

Security of wireless internet is the most important issue. Anyone can access wireless internet in its radial distance. Secure wireless internet with password so that only network computers has the access to the internet connection. Any outsider must first need to handclasp local area network.

hy you need to secure your wireless internet connection? Or What if any outsider shares your internet connection? A simple answer to this question is that if an outsider is sharing your connection, he is eating your data receiving and transferring limit and you may remain hungry. Although you are paying full charger yet you are not consuming the available limit. Another important issue is the sharing of bandwidth which results in low speed connection and ultimately low downloading speed.

What is Wireless Backhaul

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Wireless Backhaul

Now – a – Days wireless backhaul is becoming more and more popular as there is demand for data is placed at the point through which receiver can access the data easily. Wireless backhaul has changed the internet horizon as now internet is available even at the remote areas so is the wireless backhaul comes forward to support the network. Wireless Backhaul provides the benefit of access network communication even at the far off places where wiring is not possible or cost higher. Wireless backhaul is not only cost-effective and accessible but also gives high performance.

Present era is the age of speed and wireless. Everyone is looking for the latest technology that it might be more speedy and invisible like a blink of an eye. Hunger for more, for the best never ends. Wireless Backhaul is one such thing ready to fulfill the desire for more.

Clients are coming to ask for the wireless connection which can handle a large amount of data download in a blink of an eye, video conferencing with sound effects and many new applications, for all such demands wireless backhaul is here to perform them. Everything is right but the good point of this wireless backhaul is that it is low-priced hence economic. It omits the need for wired infrastructure covering a lot more space and also risky. It has the potential to up the speed and down the cost the philosophy go parallel to give good speed to the ISP to uplink the data and for consumer downlink the application.

Wireless backhaul is facilitating many applications by providing back up for the speed and unlimited data download option.

  • Different campuses are interlinked without any mess of wires.
  • Cellular towers are wirelessly connected reducing the carrier charges.
  • Wireless backhaul has an edge over wired as it facilitates the large amount of audio / video data download.
  • The term “Last Mile Connectivity” is used to define Wireless Backhaul as it lends a hand to expand the wireless range even in distant locations.

Wireless backhaul has manifold prospects as it is very easy to deploy because it needs no trenching and wiring, saving the time as well. Wireless backhaul need a very less infrastructure, so flexible to deploy anywhere. Without wiring and trenching it costs you a penny more than wired but a lot more benefits to enjoy.

Whether look with aspect of a service provider (wireless connectivity, speed, large amount of data) or customer with so many demands (able to use multimedia applications with great ease and speed, audio / video facilities) Wireless Backhaul is the only solution you can provide or take cost you less give you more.

Wired Network Connections

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The wired network connections can be defined as a jack in which we plug a network connection and hence a wired connection is established. Wired network connections are similar to the phone jacks except for the size. Network jacks are yellow and orange in color. Wired network allows for the fast and easy access to the internet. All the wired networks are full duplex, switched.

All these wired connections are of about 100mb. Wired connections are much faster than dial up connections. Any DSL connection is 1800 times faster than the ordinary dial up connection. Though wired network connections are of many uses, but they require an extensive network of wires. The wired connection require extensive cable network underneath. This network requires an expense of coaxial cable, copper cable and sometimes fiber optic to get established.

Wired Ethernet Network Connections

This is a very fast wired Ethernet connection. The wired Ethernet connection can provide up to 1000mbit/sec speed. However it can not be ensured that full connection can be utilized. The usual wired Ethernet connection is provided using optical fiber cable or twisted pair cable. Its initial bandwidth can be of 10mbits/sec. this wired broadband connection does not require any additional hardware for its application.

Types of wired internet connections

There are many types of wired internet connections which help to establish wired network connections. B-ISDN, DSL, ADSL, ADSL+2, SDSL, VDSL and cable are included in the various forms of the wired internet connections-DSL stands for broadband integrated services digital networks. Unlike ordinary ISDN when the data is transferred over an optical fiber cable its efficiency and speed is increased, this high speed broad band connection is then termed as B-ISDN. The wide implementation of this connection is not that popular. SONET provides the backbone physical structure for this connection. When you need an internet connection which is not binding your telephone line when you are connected to the worldwide network, the best option to go for is digital subscriber line (DSL).DSL is always on except for an unexpected electricity failure. The most modern version of DSL is ADSL that is asymmetric digital subscriber line. It supplies the speed of about 9Mbps maximum. ADSL is applied using special modem. An extension to ADSL is ADSL+2 in order to provide faster internet connections. This ADSL connection splits the copper wired telephonic connection into two lines. This connection is provided by ISPs in areas which are close to their network. Symmetric digital subscriber line (SDSL) is most commonly used in Europe. The data rate for this network is about 3mbps.SDSL send high frequency faster internet signals over the traditional copper cable. This connection also requires particular modem. VSDSL is an improved and extended version of SDSL, meant to cover small geographical areas. More recent cable modem is placed in for the TV channels and the internet at the same time.

Comparison of dial up wired connections

As compared to the wired high speed connections dial up connections are much slower. Traditional dial up connection posses the speed of 54kb whereas any broad band wired connection can reach to a speed to 3mb.the dial up connection though is less expensive, but one has to incur cost when ever trying to connect. Broad band wired connections are a one time expense because for that one has to buy an additional modem. However this expense holds a msuch faster access and connectivity to the internet. This traditional dial up network blocks the telephone line when a user is connected to the internet. However wired broadband connection enables you to connect to the internet and at the same time you can use your telephone line.

Wired Network Connections Limitations

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Wired network connection such as Ethernet has many limitations depending on the need and type of connection one has. Ethernet is established using single cable, which is shared by all other devices or terminals present on the network.

Extensive Cabling

The biggest limitation of establishing wired connection is the extensive cabling requires establishing network. There are many types of cables and wires which are used spread the network of wires. Most commonly used cables are twisted pair cable, fiber optics and copper cables. Optical fibers are preferred due to their transparency, high data transfer rates and strength. Let’s analyze an example of creating an Ethernet wired connection in a university campus. First of all the network cables need to be transplanted in the walls. Besides this each l cable has to be attached to the individual terminals in order to make connections. The computer lab would be loaded with the network of wires. This network of wires gives a feeling of discomfort and untidiness. If by chance any of the network cable is disconnected, the entire setup would be distressed. If we connect the existing network with more terminals, the efficiency and the speed of wired network will deteriorate. The network would not proficiently share resources and transfer data.

Other limitations involved in wired network connections

If for example, you want to sell your space where you have established any wired network. You have to incur an extra cost of destabilizing the network. Especially if the wires are embedded in the walls, they are difficult to pull out. The extensive wired network can off set the look of your room or office. The wired network using fiber optic is often prone to a threat of being cracked by mice or fish (if the cable is spread under the water). The connection of wires even does not allow you to work in an open space like in a garden, park or near your swimming pool. This constraint of immobility resulted in the use of wireless connections. One can not form a network in the areas where it is difficult to carry cables. In those areas expensive wireless connection need to be developed. Installation is difficult and slow. Specialized labor is required to install any wired network connections. In some cases like DSL wired connections only ISPs can install the software’s and the DSL device. Access to the network is limited. Growth in the stable network is limited due to inadequate changes.

Wired network and its backbone

Wired network of any type as LAN, or MAN requires a backbone structure of wires in order to perform it operations. The need of the time is the mobility of devices. People all around the world prefer smart phones, laptops and palmtops. Hence it is difficult to provide a wired backbone to each and every location. Therefore more mobile and easily used networks are desired like the Bluetooth technology. The limitation of supporting the wired network with fiber optic acting at its back has put the small investors out of the business. Hence we can say there is monopoly in the field of telecommunications. Some big names are exploiting the various opportunities present in the market. Large telecommunication companies have developed large fiber optic networks underground. Consequently only they are able to provide wired internet connections such as DSL, ADSL, SDSL and cable network. Some organizations are now replacing wired networks due to their immobility. People prefer wireless connections because they can interact with their peers and friends wherever they are. Wired networks also limit the use of video conferencing due to bounded network.

What is ATM (Asynchronous Transfer Mode)

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The charge of maintaining take apart, specific networks for computer, voice, and video is far above the ground. To decrease networking overheads, Asynchronous Transfer Mode (ATM) facilitates combination of all of these services on an individual network and the mixture of accessible networks into a particular infrastructure. In exacting, Windows operating systems give well-off connectivity using ATM whereas maintaining hold up for legacy systems.

To hold up Asynchronous Transfer Mode (ATM), Network Driver Interface Specification (NDIS) has been modernized with ATM instructions. As many functions do not up till use ATM services, Windows Server 2003 comprises hold for LAN Emulation (LANE) for LAN function, for instance, Ethernet. Likewise, IP over Asynchronous Transfer Mode (ATM) hold has been added, removing the extra header price of LAN packet.

Overview of ATM

Asynchronous Transfer Mode (ATM) is a connection-oriented, untrustworthy (does not allow the receiving of cells throw), practical circuit packet switching tools. Dissimilar most connectionless networking protocols, Asynchronous Transfer Mode (ATM) are a deterministic networking system. It offers expected, definite quality of service. From one after the other, each section in an ATM network gives a high rank of power.
Asynchronous Transfer Mode (ATM) technology comprises:

  • Scalable presentation. Asynchronous Transfer Mode (ATM) can send information over a network speedily and precisely, in spite of the volume of the network. ATM functions well on both very little and very speedy media.
  • Good, definite Quality of Service (QoS). Asynchronous Transfer Mode (ATM) permits the correctness and rate of information transfer to be specified by the user. This characteristic differentiates ATM from other speedy LAN machinery for instance gigabit Ethernet. The Quality of Service quality of ATM also supports time needy traffic. Traffic administration at the hardware stage makes sure that quality service subsist end-to-end. Every virtual circuit in an Asynchronous Transfer Mode network is unchanged by traffic on additional virtual circuits. Tiny packet size and a easy header arrangement guarantee that switching is completed rapidly and that holdups due to large traffic are decreased.
  • Clear speed. Asynchronous Transfer Mode (ATM) requires no architectural rapidity boundaries. Its pre-discussed circuits, fixed-length units, communication segmentation and re-gathering in hardware, and hardware-level switching all assist support tremendously rapid forwarding of information.
  • Integration of special traffic form. Asynchronous Transfer Mode (ATM) supports combination of voice, videotape, and records services on a particular network. Asynchronous Transfer Mode (ATM) above Asymmetric Digital Subscriber Line (ADSL) permits inhabited access to these services.

ATM Network Interfaces

Asynchronous Transfer Mode (ATM) networks consist of Asynchronous Transfer Mode (ATM) switches consistent by point-to-point ATM family. The links linking the switches appear in two varieties, user-network interfaces (UNIs), which attach ATM endpoints to ATM switches, and network- node interfaces (NNTs), which attach ATM switches.

User-network interfaces (UNIs) and network- node interfaces (NNTs) are more classified with the sort of network that the switch exists in public or private. This form explains examples of numerous structures.

ATM Features

Asynchronous Transfer Mode (ATM) implements two functions that show it both functional and attractive (attractive in a network bore kind of system). Anyhow, the two functions are asynchronous broadcasting and fixed cell range.

The ATM layer Functions

The Asynchronous Transfer Mode (ATM) layer is liable for transmitting cells from the ATM Adaptation layer (AAL) to the physical layer for broadcasting and from the physical layer to the ATM Adaptation layer (AAL) for exercise at the end structure, it find out where the received cells should be promoted to, rearrange the matching links identifiers and forwards the cells to the subsequent connection, in addition to buffers cells, and handle different traffic administration functions for instance unit loss precedence mark, congestion sign, and general flow control right. As well as it also observe the transmission time and conformance to the service agreement.