ITPEC FE Subject A April 2024 Question 23
ITPEC FE Subject A April 2024 — Question 23 of 60
Switching Hub (Layer 2 Switch) — forwards frames based on destination MAC address.
A switching hub (also called a Layer 2 switch) examines the destination MAC address in the frame header and forwards the frame only to the appropriate port.
Why not others:
- (a) Patch cable — a passive cable; makes no forwarding decisions
- (b) Repeater hub — operates at Layer 1; broadcasts signals to all ports without inspecting addresses
- (c) Router — operates at Layer 3; forwards packets based on IP addresses, not MAC addresses
Key rule: MAC address → Layer 2 → switch. IP address → Layer 3 → router.
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