ITPEC FE Morning October 2023 Question 30
ITPEC FE Morning October 2023 — Question 30 of 80
Router packet forwarding — a router uses the destination IP address to determine where to forward an incoming packet.
A router operates at Layer 3 (Network layer) of the OSI model. It examines the destination IP address in the packet header and looks it up in its routing table to decide the next hop.
- •Router → uses
destination IP address(Layer 3) - •Switch → uses
destination MAC address(Layer 2)
Why not others:
- (b) Destination MAC address — used by switches, not routers
- (c) Source IP address — indicates origin, not destination
- (d) Source MAC address — Layer 2 info about origin, irrelevant for routing
Key rule: Routers route by IP; switches forward by MAC.
AI-generated — may contain errors
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