Alcatel-Lucent 4A0-101 問題集

質問 1：
In IS-IS, which of the following statements regarding an L1/L2 router is false?
A. An L1/L2 router can have neighbors in different areas.
B. An L1/L2 router sets the ATT bit in L1 LSPs to identify itself as an L1 router.
C. An L1/L2 router calculates separate SPF trees for the Level 1 and Level 2 topology.
D. An L1/L2 router advertises its L2 routes to its L1 neighbors.
正解：B

質問 2：
What causes an adjacency to change from down to two ways?
A. When a router receives a database description packet from a neighbor.
B. When a link state update is received in response to a link state request.
C. When a link state acknowledgement is received in response to a link state update.
D. When a router receives a Hello packet that contains its own router ID in the neighbor list from a neighbor.
正解：D

質問 3：
What best describes the type of packets used by OSPF routers to exchange updates on a pointto-point link?
A. IP packets sent to an IP multicast address.
B. Ethernet frames sent to an Ethernet multicast address.
C. UDP packets sent to an IP multicast address.
D. IP packets sent to an IP unicast address.
正解：A

質問 4：
Static routing is to be used in a network between a corporate head office with many connected networks and a branch office with one connection to the head office. Which of the following is the most likely configuration on the head office and branch office routers?
A. The head office has a default route and the branch office has a specific static route.
B. The head office has a specific static route and the branch office has a default route
C. The head office and the branch offices both have specific static routes.
D. The head office and the branch office both have default routes.
正解：B

質問 5：
Click on the exhibit.

OSPF is operational on all links in the network diagram, all links are the same cost, and all routers are configured with an ECMP value of 4. Router R4 advertises the prefix 192.168.3.0/24 into OSPF.
How many entries for prefix 192.168.3.0/24 will be in router R5's routing table?
A. 0
B. 2
C. 3
D. 4
E. 1
正解：B

質問 6：
Which of the following best describes the features of Classless Inter-Domain Routing (CIDR)?
A. Automatic summarization and the use of IP addresses that use any number of bits for the network portion of the address.
B. Manual summarization and the use of IP addresses that use any number of bits for the network portion of the address.
C. Automatic summarization and the use of IP addresses that use a fixed number of bits for the network portion of the address.
D. Manual summarization and the use of IP addresses that use a fixed number of bits for the network portion of the address.
正解：B

質問 7：
Click on the exhibit.

Two neighboring OSPF routers have exchanged the packets shown. What state is the adjacency in?
A. Initializing
B. Full
C. 2-way
D. Down
正解：B

質問 8：
What is the primary purpose of variable length subnet masks (VLSM)?
A. To allow different subnet masks for different subnets.
B. To reduce the size of each routing update.
C. To reduce the size of the routing table.
D. To allow interoperability between routing protocols.
正解：A

質問 9：
Which of the following are similarities between OSPF and IS-IS? Choose two answers.
A. Support for CIDR.
B. Support hierarchy through the use of areas.
C. Link state updates sent using layer 3 multicast.
D. Metric is based on hop count.
E. Slow convergence after link failures.
正解：A,B