Establishing a computer network requires the installation of several hardware and software components. The data is sent to the next network points in the form of packets; this transfer of packets is carried through routers. Routers are efficient devices which perform the task of delivering and forwarding information.
Types of Routers
Routers are of many kinds depending on the need of the enterprises, individuals and official use. Largest routers such as Cisco CRS-1 and Juniper T-1600 are used to set up network of large organizations and even of the ISPs. Routers can be divided into three broad categories depending upon the need of the network. First of their kind are internet connectivity routers, are large multipurpose routers. These routers are used to exchange and carry information through the Border Gateway Protocol. Internet connectivity routers are further divided into four sub categories. These four sub categories include edge router, subscriber edge router, inter provider border router and core router. When a router is placed at the boundary of an ISP and when they communicate with the large autonomous router and external router, it is called edge router. Working at the boundary of the subscriber’s network, this router helps to communicate between BGP speaker and ISPs AS. When two border gateway protocols speaks to each other via ASes, it is called an inter provider border router.
A router that provides sufficient support to the LAN, by becoming an integral part of the LAN is called core router. Second important kind of routers is SOHO routers. When a router is inserted to make connection to a DSL or other networks for a small geographical area it is known as SOHO connectivity. Third of its types are enterprise routers. Enterprise routers have further three branches access, distribution and core routers. Low cost SOHO routers are placed at the branch offices for simple routing operations; they are termed as access routers. Distribution routers collect a flow of data from several routers and bring it to main location. Distribution routers increase the efficiency of large networks such as WAN. Core routers are used to connect the dispersed network routers in order to achieve high bandwidth.
How Routers Works
Routers are network devices which transfer the data packets along networks by determining the paths of the networks. Routers determine path to many networks such as Electronic networks, Transportation networks and telephone networks. Routers mainly operate in two ways using either control plane or forwarding plane. In control plane the router acts in a more neat and smart way. It sends the precise data packets to their specific location. While following a forwarding plane, a router does not need to remember the sending or receiving information about the packets. The ultimate objective of the router is to deliver the data packets. The forwarding decision takes place at the data link layer of the OSI model.
Advantages of Routers
Routers deliver the packets of data in an organized way, thus lowering the data load. Routers enable a stead and reliable connection between network hosts. Routers make use of alternative parts incase the main parts fail to transfer data packets. Another advanced version of network routers is wireless routers. The wireless routers establish a communication link between devices and networks without the use of wires. Placing a wireless router in the centre of your home will enable you to work any where you want to in your home including your lawn and swimming pool. If we compare the bridges with network routers, we would end up saying bridges are passive transfer devices which are not able to determine the network path. Hence routers can be used as an adaptable device.