Huawei H12-891_V1.0-ENU 問題集

質問 1：
Regarding route introduction, the following description is correctly? (Multiple choice questions).
A. Use the default-route imported command in BGP only to introduce default routes that already exist in the local IP routing table.
B. When ISIS introduces an external route, if you do not specify the route type that is introduced, the Level-1 route is introduced by default on the L1/2 router
C. OSPF introduces two types of external routes, with the first type of external route taking precedence over the second type of external route.
D. When ISIS introduces an external route, if you do not specify the type of route that is introduced, the Leve1-1 route is introduced by default on the L1 router .
正解：A,C

質問 2：
Host HW1 in the HW device network Wants to join a video conference, so what does that host do?
A. The IGMPV2 membership report is sent over multicast in the local network, and the destination multicast address of the IGMPv2 membership report is "All PIM Routers" 224002 Multicast address
B. Sends a unicast IGMPv2 membership report to the RP
C. Sends an IGMPv2 membership report to the default router unicast of the local network
D. The IGMPv2 membership report is sent over multicast in the local network, and the multicast address carried in the IGMPv2 membership report is the multicast address that you want to join
正解：D

質問 3：
Users within a typical VPN can only communicate with each other, not with Internet users, and with Internet. But VPN individual sites may have access to internet's needs. The correct description of the implementation of VPN interconnection with internet is? (Multiple choice questions).
A. Implemented on the user side, the implementation method is simple, and the public network and private network routes are isolated, safe and reliable.
B. Implemented on PE, the PE device issues a default route to the CE to the Internet and adds a default route to the VPN instance routing table pointing to the Internet Gateway o
C. Implementing a complex implementation on PE and having security implications, PE devices may be subject to Dos attacks on the Internet.
D. is implemented on the user side, and the CE is directly connected to the Internet. Each user site can be connected to the Internet separately, that is, the CE of each site is configured with a default route to the Internet.
正解：A,B,C,D

質問 4：
Which of the following are used in Ethernet?
A. Mac address in canonical format
B. CSMA/CD in multiplexed interviews
C. A MAC address in a non-canonical format
D. 8025 encapsulated frames
E. 8023 Encapsulated Frame
正解：A,B,E

質問 5：
What information does the BGP Open message carry as follows?
A. Hold time
B. Local Autonomous System (AS) number
C. Route attributes
D. BGP Router ID
正解：A,B,D

質問 6：
Which of the following LSAs propagate in a single region only?
A. Network LSA
B. Summary LSA
C. AS External LSA
D. Router LSA
正解：A,B,D

質問 7：
The following statement about IS-IS (IPv6) is correct?
A. In order to support the processing and calculation of IPv6 routes, IS-IS has added NLPID to the 129 TLV
B. IS-IS works at the data link layer and only needs to add a new TLV to support IPv6
C. By default, IS-IS has the multi-topology feature turned on
D. In order to support the processing and calculation of IPv6 routes, IS-IS has added TLV232 and 236
正解：A,B,D

質問 8：
Regarding the DSCP field, the following statement is incorrect: single selection
A. The DSCP value can be 0, and packets use the default forwarding mechanism when 0
B. When the value of DSCP is EF, it indicates that the data belongs to the accelerated forwarding class.
C. In addition to indicating the priority of the data, DSCP can also indicate the probability of data being discarded. The CS class in
D. DSCP divides data into 8 priorities.
正解：B