Huawei H12-221 Online Practice Questions and Exam Preparation

Huawei H12-221 Online Questions & Answers

• Question 21:

  Which of the following are OSPF message types? (Select 4 answers)

  A. Hello
  B. Database Description
  C. Link-State Request
  D. Link-State Update
  E. Link-State Advertisement
  A. Hello
  B. Database Description
  C. Link-State Request
  D. Link-State Update

• Question 22:

  Which of the following statements regarding the Reverse Path Forwarding (RPF) mechanism are true? (Select 2 answers)

  A. Multicast RPF does not depend on unicast routing.
  B. All multicast protocols adopt the RPF mechanism.
  C. A router discards the received multicast packets if the RPF check fails.
  D. The RPF mechanism has two functions: It prevents multicast routing loops and the forwarding of redundant multicast packets.
  C. A router discards the received multicast packets if the RPF check fails.
  D. The RPF mechanism has two functions: It prevents multicast routing loops and the forwarding of redundant multicast packets.

• Question 23:

  Which of the following messages exist only in PIM-SM? (Select 2 answers)

  A. Join/Prune
  B. Assert
  C. Bootstrap
  D. Register
  C. Bootstrap
  D. Register

• Question 24:

  Based on BGP route selection rules, the route with the lowest local preference is preferred.

  A. TRUE
  B. FALSE
  B. FALSE

• Question 25:

  Which type of BGP route can be added to the BGP routing table?

  A. All BGP routes learned from peers
  B. Only the routes learned from IBGP peers
  C. Only the routes learned from EBGP peers
  D. Only optimal routes
  A. All BGP routes learned from peers

• Question 26:

  Which of the following situations will occur when the command "multicast bad balance" is configured? (Select 3 answers)

  A. If there exists no unicast equal-cost routes, multicast load balancing fails.
  B. If group address-based load splitting is employed, balanced distribution of entries over equal- cost routes cannot be ensured due to hash function limitations.
  C. Balanced distribution of entries over equal-cost routes can be ensured as long as multicast load balancing is performed.
  D. During multicast load splitting, traffic may not be balanced among equal-cost routesbecause multicast load balancing is based on multicast entries not multicast data packets.
  A. If there exists no unicast equal-cost routes, multicast load balancing fails.
  B. If group address-based load splitting is employed, balanced distribution of entries over equal- cost routes cannot be ensured due to hash function limitations.
  D. During multicast load splitting, traffic may not be balanced among equal-cost routesbecause multicast load balancing is based on multicast entries not multicast data packets.

• Question 27:

  If the default-route-advertise command is used to advertise a default BGP route to peers, how will this operation affect the local BGP routing table?

  A. An inactive default route will be generated in the local BGP routing table which will not be delivered to the IP routing table.
  B. An active default route will be generated in the local BGP routing table which will be delivered to the IP routing table.
  C. The local BGP routing table will not be affected and no default route will be generated.
  D. A default route will be generated in the local BGP routing table. Whether this route is delivered to the IP routing table depends on route selection results.
  C. The local BGP routing table will not be affected and no default route will be generated.

• Question 28:

  How does community attribute of the BGP route set by routing policies affect route selection?

  A. The Community attribute directly affects route selection because it must be compared during the route selection process.
  B. The Community attribute does not affect route selection because it is non-transitive and cannot be transmitted between routers.
  C. Routes are classified by the Community attribute which indirectly affects route selection. Different route attributes such as the Local-Preference and MED values can be set for routes in different communities.
  C. Routes are classified by the Community attribute which indirectly affects route selection. Different route attributes such as the Local-Preference and MED values can be set for routes in different communities.

• Question 29:

  Which of the following is the multicast distribution tree maintained by PIM-DM?

  A. SFT
  B. CBT
  C. RFT
  D. STP
  A. SFT

• Question 30:

  Which statement regarding BGP is false?

  A. BGP runs over TCP.
  B. BGP is an enhanced distance-vector routing protocol.
  C. BGP uses port number 189.
  D. BGP is an inter-AS routing protocol.
  C. BGP uses port number 189.