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Huawei H12-831-ENU Exam Syllabus Topics:

Huawei HCIP-Datacom Sample Questions:

1. Which of the following will not cause the VRRP backup group to flap?

A) Packet loss on the backup device interface
B) The VRRP backup group preemption delay configuration of the two countries is inconsistent
C) The time interval of the notification message is too small
D) Link flapping for transmitting VRRP advertisement packets

2. What are the reasons why DHCP faces many security threats? (Multiple choice)

A) DHCP Server cannot distinguish what kind of CHADDR is super legal and what kind of CHADDR is illegal
B) The man-in-the-middle exploits the fake IP-to-MAC mapping relationship to deceive both the DHCP client and the server at the same time
C) Because the DHCP discovery message (DHCPDISCOVER) is sent in the form of broadcast
D) DHCP dynamic allocation of IP addresses has a long response time

3. 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) Only link-local addresses
B) Can only be a global unicast address
C) Can carry link-local addresses and global unicast addresses at the same time
D) Can be just a link-local address

4. When deploying MPLS/BGP IP VPN, which of the following descriptions is wrong regarding the use of BGP to exchange routing information between PE-CE?

A) When BGP is used to exchange routing information between PE and CE, if the autonomous systems where the two VPN sites are located use the same private AS number, the AS number replacement function can be used to replace the received private AS number with any specified AS number. The AS number in the network route to prevent the route from being discarded due to repeated AS numbers
B) In the case of CE multi-homing, enabling BGP AS number replacement may cause routing loops. BGP SoD can be used to prevent routing loops in VPN sites.
C) In the Hub&Spoke scenario, when Hub-CE and Hub-PE use IGP, Spoke-PE and Spoke-CE cannot use EBGP
D) When BGP is used to exchange routing information between PE and CE, there is no need to import private network routes into BGP on PE.

5. In BGP MPLS IP VPN, if OSPF protocol is used to exchange routing information between PE and CE, the domain identifier (Domain ID) is used to distinguish whether the routes imported in the VPI instance come from the same OSPF domain.

A) FALSE
B) TRUE

Solutions: