Huawei h12-891-v1-0 practice test

Regarding the mpLS handling mode of TTL, is the following description correct?

• A. Pipe mode. When an IP message passes through the MPLS network, the IPTTL minus 1 is mapped to the WLSTTL field at the incoming node.
• B. The TTL in the B. MPLS label has the same meaning as the TTL field in the head. TTL prevents mpLS networks from developing bad routing.
• C. Unifore style, when an IP packet passes through the MPLS network, the IPTTL of the incoming node is minus l. The MPLS TTL field is a fixed value.
• D. In MPLSVPI, if you need to hide the structure of the MPLS backbone network, you can use Uniform mode on Ingress for private network messages .

In an MPLS VPN network, different CE devices exchange routing information with the same PE
device using different routing protocols, and different CE devices use routing protocols that are
independent of each other
A.
True
B. False

Which of the following options uses an alternate channel to enable communication between IPV6
addresses?

• A. DualStack
• B. 6to4
• C. ISATAP
• D. NAT64

If a router only needs to forward iPv6 packets, you do not need to configure any IPV4 agreements
and addresses on that router.

• A. True
• B. False

BGP4+ is running between two routers, and the neighbor relationship is normal, but the BGP routing
table of the router on this side does not have a neighbor route entry.

• A. The route entry in the peer BGP route table is non-optimal.
• B. The next hop address of the
• C. BGP route entry is unreachable
• D. Peer ignore is configured on the peer
• E. The peer is configured with active-route-advertise

Which of the following options can affect the establishment of IBGP neighbors?

• A. iBGP-Multi-hop is not configured
• B. Authentication is unsuccessful
• C. IGP routing is not passable
• D. BGP protocol version inconsistencies

Which of the following tools cannot be referenced directly by the If-match clause in Route-policy?

• A. Regular expression
• B. IP-prefix
• C. AS-path-filter
• D. Community-filt

What information does this contain in a basic layer packet? (Multiple choice) A Data link layer header
B. Upper-level data
C. The network layer header
D. path records
E. Network Layer Tail

The correct description of configuring BGP4+ is that

• A. BGP4+ does not support route reflectors.
• B. The next hop of a B. BGP4 route can use the Link-Local address.
• C. BGP4 configures the reflector, the role positioning of the reflector and the client needs to be consistent with the configuration of BGP4
• D. BGP4 specifies p
• E. BGP4+? Router-ID ? BGP4 ? Router-ID—??

A company network runs the OSPF protocol, a project in order to understand the OSPF mechanism in
the network to perform packet transfer operations, the following description of ospf messages is
correct?

• A. The interface sends a Hello packet immediately after joining the OSPF region
• B. LS update packet is sent only when the adjacency relationship is established
• C. When an LsUpdate packet is received, the router must send an LsAck acknowledgment
• D. LS update packet synchronizes the link state database by sending detailed LSA information