Huawei H12-821_V1.0-ENU 問題集

質問 1：
In order to avoid inter-area loops, OSPF stipulates that routing information is not allowed to be published directly between two non-backbone areas. Routing information is only allowed to be published within an area, or between a backbone area and a non-backbone area. Therefore, each Area Border Router (ABR) must be connected to the backbone area.
A. FALSE
B. TRUE
正解：B

質問 2：
What is the difference between PIM-SM protocol and PIM-DM protocol? (Multiple choice)
A. PIM-SM assumes a small number of receivers in the network while PIM-DM assumes a large number of receivers in the network
B. BSR/RP only exists in PIM-SM network and does not exist in PIM-DM
C. PIM-SM can forward on-demand traffic without redundant traffic in the network, while PIM-DM floods periodically and there is no redundant traffic in the network.
D. RPT and SPT trees exist in PIM-SM, while only SPT trees exist in PIM-DM
正解：A,B,D

質問 3：
Which of the following protocols can generate a multicast distribution tree?
A. IGMPv2
B. BGP
C. OSPF
D. PIMv2
正解：D

質問 4：
Which of the following descriptions about the triggering mechanism of 802.1X authentication is correct? (Multiple choice)
A. 802.1X authentication can only be initiated by the client
B. The 802.1X client can trigger authentication by multicast or broadcast
C. 802.1X authentication cannot be initiated by an authentication device (such as an 802.1 switch)
D. The authentication device can trigger authentication in multicast or unicast mode
正解：B,D

質問 5：
Through the linkage between BFD and MPLS LSP, BFD can be dynamically created to detect the connectivity of static or dynamic LSP.
A. FALSE
B. TRUE
正解：B

質問 6：
Using NAT technology, only the network layer information (IP address) in the data packet can be translated.
A. FALSE
B. TRUE
正解：A

質問 7：
In WLAN networking, in order to ensure network reliability, corresponding backup technology can be deployed according to user requirements. Which of the following descriptions of common backup technologies are correct? (Multiple choice)
A. After deploying VRRP dual-machine hot backup, when the main AC fails, the backup AC will directly take over the work.
B. After N+1 backup is deployed, when the primary AC fails, the AP re-establishes a CAPWAP link with the backup AC and the backup AC takes over.
C. After deploying dual-link hot backup, when the main AC fails, the AP switches to the backup link and the backup AC takes over the work.
D. After deploying dual-link cold backup, when the main AC fails, the AP switches to the backup link and the backup AC takes over the work.
正解：B,C

質問 8：
The output of a device viewing LSDB is shown in the figure. According to the content analysis in the figure, what information can we obtain? (Multiple choice)

A. Router 1.1.1.1 belongs to the non-backbone area
B. Router 4.4.4.4 belongs to Guqian District City
C. Router 2.2.2.2 is an ASBR, but does not belong to the same area as 4.4.4.4
D. The LSA 10.1.0.4 has survived on this router for 875 seconds
E. Route summarization is not used in the entire OSPF domain
正解：A,C,D

質問 9：
What kinds of special areas does OSPF define? (Multiple choice)
A. Not-So-Stubby Area
B. Stub-Area
C. Totally Stub Area
D. Totally NSSA
正解：A,B,C,D