ITPEC FE Subject A October 2024 Question 23
ITPEC FE Subject A October 2024 — Question 23 of 60
Repeater — amplifies signals to extend transmission distance between same-type LAN segments (Layer 1).
Key LAN interconnection devices:
- •Repeater — Layer 1, amplifies/regenerates signals between same-type segments
- •Bridge — Layer 2, forwards frames based on MAC addresses (not IP)
- •Switch — Layer 2, same as bridge but with multiple ports
- •Router — Layer 3, routes packets based on IP addresses (not MAC)
- •Gateway — converts protocols across all OSI layers (not just layers 1–3)
Why not others:
- (a) A bridge uses MAC addresses, not IP addresses
- (b) A gateway converts protocols across all 7 layers, not just layers 1–3
- (d) A router uses IP addresses, not MAC addresses
Key rule: Match each device to its OSI layer: Repeater = L1 (physical signal), Bridge/Switch = L2 (MAC), Router = L3 (IP), Gateway = all layers.
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