ITPEC FE Morning April 2018 Question 32
ITPEC FE Morning April 2018 — Question 32 of 80
Router in TCP/IP Model — identify network equipment by its highest operating layer.
Equipment A operates at the Internet Layer (Layer 3) and connects two LAN segments → it is a router.
Layer-to-device mapping:
- Physical Layer (L1) — repeater hub (amplifies signal, no logic)
- Link Layer (L2) — bridge or switching hub (forwards frames by MAC address)
- Internet Layer (L3) — router (forwards packets by IP address)
Why not others:
- (a) Bridge — operates at Link Layer only
- (b) Repeater hub — operates at Physical Layer only
- (d) Switching hub — operates at Link Layer (multi-port bridge)
Key rule: The highest layer shown in the device diagram determines its type.
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