ITPEC IP April 2021 Question 30
ITPEC IP April 2021 — Question 30 of 100
All local devices must connect on the router's LAN side, while only the router's WAN side connects to the Internet. In diagram (a), the three PCs and TV reach the Internet through the router, so every Internet-bound or incoming flow crosses its firewall. The hub merely expands the protected LAN.
Answer (a)
Why not others:
- (b) places the TV on the external side
- (c) places one PC and the TV on a hub that can reach the Internet without passing the firewall
- (d) connects the TV on the WAN side and leaves the hub outside
Key rule: A perimeter firewall protects all devices only when it is the sole path between the internal LAN and the external Internet.
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