HCIA-Datacom H12-811_V1.0 Exam Dumps

The MAC address table does not contain an entry for 5489-98EC-F011.

When a switch receives a frame with an unknown destination MAC address, it performs flooding.

Flooding sends the frame out of all interfaces except the one it was received on.

A (Incorrect): The switch does not discard unknown frames; it floods them.

B (Incorrect): No request is sent; flooding occurs instead.

D (Incorrect): ICMP is used for network-layer (IP) communication, not Ethernet switching.

Thus, the correct answer is C (Floods the frame on all interfaces except the incoming one).

SNMP Port Numbers:

161: Used for SNMP managers to send requests to agents.

162: Used by SNMP agents to send trap or alarm messages to the Network Management System (NMS).

163 and 164: Not commonly used in SNMP operations.

Disabling STP on a network with redundant paths between switches leads to a Layer 2 loop, which can cause broadcast storms and network congestion. STP is essential for preventing such loops by blocking redundant paths until needed for redundancy, ensuring network stability​.