Huawei H12-811_V1.0 Exam With Confidence Using Practice Dumps

Switch Forwarding Behavior:

If the destination MAC is not found in the MAC address table, the switch floods the frame.

Broadcasting Within VLANs:

VLAN tagging ensures the frame remains within its designated VLAN.

The frame is not sent to all interfaces but only within the VLAN.

Why Other Options Are Incorrect:

A: Does not consider VLAN segmentation.

C: Switches do not discard unknown unicast frames unless configured to do so.

D: Includes access interfaces only, but flooding happens on all VLAN interfaces.

Conclusion:

The switch floods the frame within the VLAN, making the correct answer B.

References: HCIA-Datacom V1.0 Certification Guide, Chapter 4: Switch Forwarding Mechanisms.

OSPF does not use TCP or UDP because it has its own reliable transmission mechanisms.

OSPF packets are encapsulated directly in IP packets using protocol number 89.

TCP (A) is used for connection-oriented communication, but OSPF does not rely on it.

UDP (C) is used for connectionless communication, but OSPF does not use it.

HTTP (B) is an application-layer protocol and irrelevant here.

Thus, the correct answer is D (IP).

Statement A (Correct): DR and BDR must form an adjacency relationship to maintain routing information exchange.

Statement B (Incorrect): The router with the higher priority is elected as DR, not the lower one.

Statement C (Incorrect): DR is elected by routers within a broadcast/multi-access network, not necessarily all routers in the same network segment.

Statement D (Correct): If two routers have the same priority, the one with the higher Router ID becomes the DR.