Question about OSI layer

Question

I am a network programming newbie.

I would like to confirm thta my answer is right or not.

Would anyone mind helping me to check the answers.

Thank you very much!

Which OSI protocol layer does a repeater correspond to? Physical layer

Which OSI protocol layer does a bridge correspond to? Transport layer???

Which OSI protocol layer does a router correspond to? Network layer

Which OSI protocol layer does a Local Area Network correspond to? Physical layer

Which OSI protocol layer does a switch correspond to? Data link layer

Which OSI protocol layer does a network interface card correspond to? Physical layer

Answer 1

• repeater: closest correspondence -> physical layer
• bridge: closest correspondence -> data link layer
• router: closest correspondence -> network layer
• switch: varies but usually -> data link layer

A NIC can, but is not limited to, handling the Physical & Data-Link layers. Some adapters have more "higher layer" functionality e.g. TOE.

A LAN is made of a collection of network elements (NEs) supporting various protocol layers.

Answer 2

bridge - data link layer (layer 2)
LAN - All 7 layers
switch - can be layer 2 or layer 3

The part on LAN is ambiguous. A LAN encompass every layer, from the physical cables , network cards all the way to host machines and to what is presented to the human being. So i would say its all 7 layers