Which of the following scenarios is not suitable for deploying interface policy routing?

• A.In the scenario where the enterprise network has multiple ISP egresses, different network segments of the intranet access the Internet through different ISP egresses
• B.On the core switch, the mutual access traffic between the internal network and the external network is drawn to the side-mounted security detection device
• C.Modify the next-hop of traffic originating locally
• D.On the core switch, the mutual access traffic between the internal network and the external network is drawn to the bypass AC device

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Two Huawei devices R1 and R2 form a VRRP backup group. R1 is VRRPv2, and R2 is VRRPv3. Which of the following descriptions about the backup group is wrong?

• A.After R2 configures the command vrrp version-3 send-packet-mode v2-only, it can exchange VRRP packets with R1
• B.After R2 configures the command vrrp version-3 send-packet-mode v2v3-both, it can exchange VRRP packets with R1
• C.By default, R1 and R2 can exchange VRRP packets
• D.After R2 configures the command vrrp version-3 send-packet-mode v3-only, it cannot exchange VRRP packets with R1

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In IGMPv1, if all the multicast members of a group leave, how many seconds does it take for the router to delete the corresponding multicast forwarding entry?

• A.90 seconds
• B.160 seconds
• C.130 seconds
• D.180 seconds

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STP ensures a loop-free network but has a slow network topology convergence speed, affecting communication quality. RSTP has made some improvements based on STP. Which of the following improvements is not included?

• A.If a port does not receive configuration BPDUs from the upstream device within four Hello intervals, the switch considers that the negotiation with the neighbor fails.
• B.The non-root switch running RSTP sends configuration BPDUs at the interval specified by the Hello timer, which is performed independently by each device.
• C.RSTP reduces five port states to three port states based on user traffic forwarding and MAC address learning.
• D.RSTP deletes three port states and adds two port roles.

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The figure shows the VRRP status switchover events. Match these events with their sequence numbers.

Correct Answer:

Explanation:
1 # A Startup message with a priority of 255 is received.2 # A Startup message with a priority less than 255 is received.3 # A Shutdown message is received.4 # The Master_Down timer expires, an Advertisement packet with the priority of 0 is received, or a packet with a priority lower than the local priority is received.5 # A packet with a priority higher than the local priority is received.6 # A Shutdown message is received.
# Reference: Huawei HCIA-Datacom Study Guide, VRRP Status Transitions.

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