N10-005 · Question #924
A technician is configuring a new DSL router. The technician can communicate with the LAN, but not the WAN. Which of the following is the MOST likely cause?
The correct answer is C. Wrong gateway. The default gateway is the router address that directs traffic from the local network to external networks (WAN/Internet). If the gateway is configured incorrectly on the DSL router, LAN communication will work fine (since it doesn't require routing to an external network), but…
Question
A technician is configuring a new DSL router. The technician can communicate with the LAN, but not the WAN. Which of the following is the MOST likely cause?
Options
- ADuplicate IP addresses
- BBad GBIC
- CWrong gateway
- DSwitching loop
How the community answered
(27 responses)- A4% (1)
- B11% (3)
- C78% (21)
- D7% (2)
Explanation
The default gateway is the router address that directs traffic from the local network to external networks (WAN/Internet). If the gateway is configured incorrectly on the DSL router, LAN communication will work fine (since it doesn't require routing to an external network), but traffic destined for the WAN will fail because the router doesn't know where to forward packets. Duplicate IP addresses would disrupt LAN communication as well. A bad GBIC relates to fiber optic transceivers, not DSL. A switching loop would cause widespread network instability, not a clean LAN-works/WAN-fails symptom.
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