Huawei H12-831-ENU : HCIP-Datacom

When the network administrator tried to access the internal network device through Telnet, it was found that it could not be accessed. Which of the following is not the likely cause?

• A. ACL is bound in the VTY user interface
• B. The protocol inbound all is configured on the VTY user interface
• C. The route is unreachable, and the client and server cannot establish a TCP connection
• D. The number of users logged into the device has reached the upper limit

BGP4+ carries the next hop address of the IPv6 route through the Next Hop attribute in the Update packet.

• A. False
• B. True

What is the meaning of ipv6 enable topology ipv6 in IS-IS protocol view?

• A. SPF calculation that does not support IPv6
• B. SPF calculation is performed separately in the topology of IPv4 and IPv6
• C. IPv4 and IPv6 use the same topology to perform SPF calculation
• D. has no meaning

Regarding the difference between NSR and NSF, which is correct?

• A. Both NSR and NSF require neighbor routers to complete
• B. NSF does not require neighbor routers to complete
• C. NSR must rely on neighbor routers to complete
• D. NSF must rely on neighbor routers to complete

In the MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following description about the two layers of labels is wrong? (Multiple choice)

• A. By default, the outer label is popped before the packet is forwarded to the last hop device.
• B. The outer label of MPLS VPN is assigned by LDP protocol or statically, and the inner label is assigned by the IP BGP neighbor of the opposite end.
• C. The outer label is used to correctly send the data packet to the corresponding VPN on the PE device.
• D. The outer label of an MPLS VPN is called the private network label, and the inner label is called the public network label.