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Question number: 354

» Basic CS » Networks

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What are different types of networking and internetworking devices?

Explanation

Difference types of networking and internetworking

Difference Types of Networking and Internetworking

Difference types of networking and internetworking

4 types of networking and internetworking devices are:

  1. Repeaters
  2. Bridges
  3. Routers
  4. Gateways

Repeater:

  • Operates only at the physical layer.

  • Increases the length of the network by correcting for the effect of signal attenuation.

  • Receives the signal in the network before it becomes weak, regenerates the original bit pattern and puts the refreshed copy back in to the link.

  • Forwards every frame; it has no filtering capability.

Bridge:

  • Operates in both the physical and logical data link layer.

  • Divides large network into smaller segments.

  • Contains logic allowing the traffic for each segment to be kept separate

  • Essentially a repeaters which relays a frame only on the side of the segment containing the intended recipient.

  • A bridge has a table that maps address to ports.

  • Limits or filters traffic keeping local traffic low.

Router:

  • Routes packets based on their logical address.

  • Operates in physical and data link layers.

  • Normally connects LANs and WANs in the internet

  • Has a routing table used for making decision on the route.

  • Routing tables are dynamic and updated using routing protocols.

Gateways:

  • Multi-purpose connection devices.

  • Accepts a packet formatted for one protocol and converts it to a packet formatted for another protocol before forwarding it.

  • Sometimes used to refer to a router.

  • Operates in all seven layers of OSI model.