Huawei H12-831-ENU 問題集

質問 1：
In the MPLS VPN network, the data packets are forwarded when entering the public network. It will be encapsulated with two layers of MPLS labels. Which of the following description about the processing of the packet are correct? (Multiple choice)
A. The outer label of the packet received by the penultimate hop device is 3
B. The data packet is forwarded to the Egress PE after popping the outer label on the penultimate hop device
C. The Egress PE device receives untagged IP packets
D. The Egress PE device correctly sends the data packet to the corresponding VPN according to the inner label
正解：B,D

質問 2：
What is the meaning of ipv6 enable topology ipv6 in IS-IS protocol view?
A. SPF calculation is performed separately in the topology of IPv4 and IPv6
B. has no meaning
C. SPF calculation that does not support IPv6
D. IPv4 and IPv6 use the same topology to perform SPF calculation
正解：A

質問 3：
The packet filtering firewall provides support for detecting fragmented packets. What are the fragmented packets that the packet filtering firewall can filter? (Multiple choice)
A. Subsequent fragmented packets
B. Forged ICMP error message
C. The first fragmented packet
D. Non-fragmented packets
正解：A,D

質問 4：
A park has deployed IPv6 for service testing. There are 4 routers (R1, R2, R3 and R4) in the network, running OSPFV3 to realize the interconnection of the IPv6 network. A new router R5 needs to be connected to the network for testing. An engineer introduces a direct route in the OSPFV3 process of R4 so that devices in the campus network can access the GE0/0/1 port address of R5.

Which of the following statements about the scene is true? (Multiple choice)
A. R4 will generate a Type5 LSA and only flood in Area1
B. R2 will generate a Type4 LSA describing the Router ID of R4
C. R2 will generate a Type4 LSA and only flood in Area 0
D. R4 will generate a Type5 LSA describing the imported IPv6 routing prefix
正解：B,C,D

質問 5：
Which description is correct about the characteristics of a high-availability network? (Multiple choice)
A. will not fail
B. Quick recovery after failure
C. Once a failure occurs, the business can only be restored through manual intervention
D. Cannot fail frequently
正解：B,D

質問 6：
In BGP4+, what is the content of the next hop network address field carried by the AP_REACH_NLRI attribute in the Update message?
A. Can only be a global unicast address
B. Can be just a link-local address
C. Can carry link-local addresses and global unicast addresses at the same time
D. Only link-local addresses
正解：C

質問 7：
In an MPLS network, SRs running the DP protocol exchange LDP messages to implement functions such as neighbor discovery, session establishment and maintenance, and label management. To ensure the reliability of message delivery, all LDP messages are sent and received based on TCP connections.
A. FALSE
B. TRUE
正解：A

質問 8：
When configuring MPLS VPNI, the administrator configured the command: interface GigabitEthernet0/0/0 ip binding vpn-instance VPN1 Interface GigabitEthernet0/0/1 ip binding vpn-instance VPN2. Which of the following description is wrong?
A. The function of this command is to bind the G0/0/1 and G0/0\/2 interfaces on the PE device to the VPN instance assigned to the customer network
B. After an interface on the device is bound to a VPN instance, the interface becomes a private network interface, and a private network address can be configured and a private network routing protocol can be run.
C. If you unbind the device from the interface and the VPN instance, it will not automatically clear the IPv4 or IPv6 configuration under the interface bound to the VPN instance.
D. This configuration command is usually configured on the PE device
正解：C