CCNA - Switch Versus Router

SWITCH VS ROUTER

WHAT IS A SWITCH?

In networking a network switch is defined as a hardware device that connects multiple workstations (computers) to one another within one Local area network (LAN). Switch is an efficient device as it inspects the data packets when they are received determines the source and the intended destination and then forwards it appropriately to the recipient device by using its Media access code (MAC) address. In other words switches use MAC address to forward the packets. Switches are incapable of connecting multiple networks. Switches are inexpensive and provide better performance than a hub. According to the OSI model the switches are classified as layer 2 (Data link) devices. In terms of network bandwidth switches utilizes bandwidth efficiently therefore wastage of bandwidth is minimal. Switches offer better network security. The switch also serves as a link between the network devices, making sure they work effectively by sharing same resources and reduces the overall cost that is required to increase the efficiency of the employees.

TYPES OF SWITCHES:

• Unmanaged Switches: These switches are pre configured. They don’t require any special installation. Mostly they have less capacity and are used in home networks.

• Managed Switches: These are configurable switches, more flexible and have more capacity than the other type. Managing of these switches can be done remotely or locally improving their efficiency.

WHAT IS ROUTER?

A router is a more sophisticated option amongst all the network devices. Just like other devices multiple computers can connect to a router. Unlike switches, routers are capable of connecting multiple networks (WAN and LAN). When a router receives a packet (information) it identifies the IP addresses of both the source and the destination and then forward these packets to its appropriate destination. In other words we can say routers decide how to forward the packets on the basis of IP address. According to the OSI model routers are classified as the layer 3 (Network layer) devices.

SWITCH VS ROUTER:

1. Routers connect networks, whereas Switches creates network.

2. Routers can connect both wired and wireless networks whereas switches can only be used with the wired connections.

3. Switches are full duplex devices that means both transmission and reception can take place.

4. Router is a Layer 3 device where as a switch is a layer 2 device.

5. Router connects two and more subnets which might not be physically present at its interface. Where as a switch connects computers present within one network.

6. Routers are smarter than the switches.

7. Router works on the IP addressing where as switches work on the MAC addressing.

8. Routers are required to be configured before use where as switches are ready to use devices.





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