Alcatel-Lucent 4A0-108 問題集

質問 1：
Which of the following are NOT characteristics of the many to many model of multicast data delivery? (Choose two)
A. Well suited for applications such as video on demand where each source sends a separate data stream to each of the many different receivers
B. All devices are potentially capable of generating multicast data
C. Well suited for applications in which the receivers provide feedback to each other and the source
D. Receivers are generally unknown by the source
E. Receivers are generally known by each other since any receiver may be a source
正解：A,D

質問 2：
How many responses are received when a router sends an IGMP version 2 query to a specific multicast group with 6 active receivers on the local broadcast domain?
A. 2
B. 6
C. 7
D. 1
正解：D

質問 3：
What is the advantage of using the S-PMSI over the I-PMSI in Draft Rosen?
A. The S-PMSI only forwards customer multicast traffic to PEs that have interested receivers.
B. The S-PMSI is required because it is the initial multicast distribution tree for the MVPN.
C. The S-PMSI reduces control plane overhead because the I-PMSI is no longer needed.
D. The S-PMSI encapsulates customer multicast traffic in an MPLS tunnel, which is more efficient than the GRE tunnel used by the I-PMSI.
正解：A

質問 4：
Which of the following regarding multicast reliability is TRUE?
A. Reliability may be added with a higher layer protocol such as RTP (Real Time Protocol).
B. Multicast traffic does not need a reliable transport.
C. UDP provides reliable transport for multicast traffic.
D. TCP provides reliable transport for multicast traffic.
正解：A

質問 5：
Click the exhibit.

The switch is not IGMP-snooping/proxy capable. What happens when Host 2 issues an IGMP report to join a group?
A. Only Router A gets this IGMP report, but no further action is taken, as Router A is not the PIM DR.
B. Both Router A and Router B get this IGMP report; Router B propagates a PIM join toward the core network.
C. Only Router A gets this IGMP report and propagates a PIM join toward the core network.
D. Both Router A and Router B get this IGMP report, and both propagate a PIM join toward the core network.
正解：B

質問 6：
When forwarding a multicast frame, normal behavior for a LAN switch (without IGMP snooping enabled) is to forward the frame as if it were:
A. A unicast frame with an unknown destination in the forwarding table
B. A unicast frame with a known source in the forwarding table
C. A unicast frame with an unknown source in the forwarding table
D. A unicast frame with a known destination in the forwarding table
正解：A

質問 7：
In Draft Rosen, a PE router encapsulates customer multicast packets into provider packets. What source IP address is used for the provider packets?
A. The source IP address of the customer packet.
B. The system IP address of the originating PE router.
C. The outgoing interface IP address of the originating PE router.
D. The source IP address specified in the MVPN configuration.
正解：B