200-301 Question #1546: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. Router-WAN1 has a new connection via Gi0/0 to the ISP. Users running the web applications indicate that connectivity is unstable to the internet. What is causing the interface issue?

Options

• AThe receive buffer is full due to a broadcast storm.
• BFrames are discarded due to a half-duplex negotiation.
• CBroadcast packets are rejected because ARP timeout is enabled.
• DSmall frames less than 64 bytes are rejected due to size.

Explanation

Unstable internet connectivity from a router's new ISP connection typically indicates an interface issue, often caused by a duplex mismatch.

Common mistakes.

• A. A broadcast storm primarily congests the local network segment and often leads to a complete loss of connectivity or extreme slowness, rather than just unstable connectivity specific to internet access.
• C. ARP timeout being enabled is a normal network function and does not cause broadcast packets to be rejected, nor is it a direct cause of unstable internet connectivity.
• D. Small frames (runts) being rejected can indicate a physical layer or cabling issue, but it's not the primary symptom or cause of unstable connectivity in the way a duplex mismatch is, which directly impacts negotiation and data flow.

Concept tested. Interface duplex mismatch troubleshooting

Reference. https://www.cisco.com/c/en/us/support/docs/lan-switching/ethernet/10570-4.html

No community discussion yet for this question.