H12-831

H12-831 practice questions, page 14 of 24, with answer review and explanations.

Question 66

Regarding BGP/MPLS IPVPN data forwarding, which of the following descriptions is wrong?

  1. When data is transmitted on the BCP/MPLS IPVPN backbone network, it always carries two layers of labels
  2. The inner label during data forwarding is assigned by MP-BGP
  3. The outer label during data forwarding can be allocated by LDP
  4. The data sent by the PE to the CE is an IPv4 packet

Question 67

Regarding BGP/MPLS IPVPN routing interaction, which of the following descriptions is wrong?

  1. The egress PE can send IPv4 routes to the remote CE through BGP, IGP or static routing
  2. After the egress PE receives the VPNv4 route advertised by the ingress PE, it filters the VPNv4 route according to the RT attribute carried by the route
  3. The exchange between PE and CE is IPv4 routing information
  4. The ingress PE changes the IPv4 route received from CE to VPNv4 route, and saves it according to different VPN instances

Question 68

Which of the following descriptions is wrong?

  1. The LSP established by statically assigning labels can also be dynamically adjusted according to network topology changes without the intervention of the administrator
  2. The principle to be followed for manual label allocation is: the value of the outgoing label of the upstream node is the value of the incoming label of the downstream node
  3. LSP is divided into static LSP and dynamic LSP. The static LSP is manually configured by the administrator, and the dynamic LSP is dynamically established using the label protocol
  4. Dynamic LSP is dynamically established through label distribution protocols, such as MP-BGP, RSVP-TE, LDP

Question 69

MPLS has the concept of FEC forwarding equivalence class, so FEC cannot be allocated based on which of the following standards?

  1. Class of Service
  2. Fragment offset
  3. Application Protocol
  4. Destination Address

Question 70

What is the flooding scope in OSPFv3 for the LSA in the entire autonomous system?

  1. Link-LSA
  2. As-external-LSA
  3. Inter-Area-Prefix-LSA
  4. Intra-Area-Prefix-LSA