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Module 3: Network Layer & Routing

20212m

Which device uses logical addressing system?

(i) Hub
(ii) Switch
(iii) Bridge
(iv) Router

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Answer

(iv) Router

Explanation

A logical address is an IP address. Routers operate at the Network layer and use logical IP addresses to make forwarding decisions between different networks.

  • Hub → Physical layer; does not use logical addressing for forwarding.
  • Switch → Data Link layer; normally forwards using MAC addresses.
  • Bridge → Data Link layer; uses MAC addresses.
  • Router → Network layer; uses IP/logical addresses.

Final answer: (iv) Router.

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