What is Switch in Computer Networking?

What is Switch in Computer Networking? – In computer networks, Switch is a network device that is always used, and it can use for a lot of computers, printers, etc. We can connect them to communicate with each other.
What is Switch in Computer Networking?

What is Switch in Computer Networking?

What is Switch in Computer Networking?

Switches used in computer networks allow communication between one or more computers or other devices. The most basic operating principle of the switches is to filter and forward IP packets to the target computer.

Switches use MAC address table (CAM table) to record the MAC addresses and IP addresses of the computers on the network. The first computer to send a file will have to save the MAC address and IP address of the target computer into the IP Packet. However, if the sending computer does not know the MAC address of the target computer, it broadcasts an ARP (Address Resolution Protocol) to the network environment.

As a result, the MAC address information of the target computer is obtained and written to the MAC address table. It will send the target computer directly without ARP broadcast on the next new packet transmissions.

The switches also start working when the power cable is plugged in. It has multiple ports and uses the CSMA/CD mechanism to prevent Collision situations.

In Which Layer Switch Works?

A LAN is created using the switches, and these LANs can be separated from each other by the routers. The switches work in layers 2 and 3 of the OSI model.

Layer 2 Switches

Layer 2 Switches are hardware based and all the ports on the switch transmit packets according to the cable speed. It uses the MAC address table to transmit IP packets.

Layer 2 switches can only send IP packets to computers in the same IP block.

Layer 3 Switches

Layer 3 Switches use both hardware-based switching and hardware-based routing. Layer 3 switching is done by integrated circuit ASIC hardware. Frame forwarding and Packet forwarding are also transmitted using ASIC hardware.

Layer 3 Switches can also forward packets to different IP blocks. Layer 3 switches can also be thought of as a router. Layer 3 Switches store source and destination routing information in the cache after the initial redirection. On subsequent packet submissions, it retrieves this information from the cache and transmits it quickly, without the need for a redirect.

Layer 3 switches are more powerful than Routers with this cache feature.

Layer 2 Switch;

What is Switch in Computer Networking?

Layer 3 Switch;

What is Switch in Computer Networking?

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What is Switch in Computer Networking? ⇒ Video

Using the GNS3 network simulator program, you can watch Cisco Layer 2 Switch configuration and how to use Switch in computer networking. Also, you can subscribe to our YouTube channel…

  Final Word

What is Switch in Computer Networking? – Layer 2 and 3 Switches have very different relative values from each other. Nowadays, Switch in networking is mostly used in business networks. In the next article, we will examine the operation of the Switches and the MAC address table on the Switch after the ARP broadcast.

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