Pass test with the help of H12-891_V1.0-ENU actual exam materials
Last Updated: Aug 29, 2026
No. of Questions: 611 Questions & Answers with Testing Engine
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| Section | Objectives |
|---|---|
| Topic 1: Network Automation and Programmability | - Network automation tools and APIs - SDN concepts |
| Topic 2: Network Security | - Basic security mechanisms - Network attack prevention and isolation |
| Topic 3: Advanced Networking Technologies | - MPLS and VPN technologies - IPv6 deployment and transition |
| Topic 4: IP Network Fundamentals | - TCP/IP and OSI model - Network architecture and protocols |
| Topic 5: Routing and Switching | - OSPF / IS-IS routing principles - BGP fundamentals and policy control |
Question 1
When you troubleshoot a local area network with Huawei equipment deployed, you find that there are a large number of unicast frames with unknown source AC addresses in the local area network.
A large number of unknown source MAC addresses single-plug frames can cause the switch the biggest danger is?
A. Increases the power consumption of the power supply
B. Consume the MAC address table entry available in the system
C. Consumes a TCAM table entry
D. Memory that occupies the cache ton
E. Consume the available bandwidth
Question 2
What of the following actions can enable fast failure detection on multicast networks?
A. A PIM BFD session is established between neighbors
B. Reduce the interval at which the interface sends Hello messages
C. Reduce the interval between sending Join/Prune messages
D. Shorten the Holdtime of Join/Prune messages
Question 3
As shown in the figure, all routing diagrams declare the loopback address in OSPF, where R2 does not return the address is 10022/32, it is advisable to tell AraD. The R3 loopback address is 10033/321001.1.0/24 external routing, in order to reduce the burden on the RI router, the configuration command is as follows:( Multiple choice questions)[Rlip ip-prefix 1 permit 001.1.024 [RLIJospfl [RL-ospf-1]filter-policy ip-prefix l import please ask the following description is correct?
A. In the P route table of router R1, there is no external route to 1001.1.0/24
B. In the IP routing table of router R1, there is an external route to 1001.1.0/24
C. In the IP routing table of router RI, there is no loopback route to R3
D. In the IP routing table of router R1, there is no loopback route to R2
Question 4
BGP authentication can prevent illegal routers from establishing neighbors with BGP routers, BGP authentication can be divided into MD5 authentication and Keychain authentication, please ask which BGP messages will be carried below BGPKeychain authentication information? (Multiple select).
A. Update
B. Keeplive
C. Open
D. Notification
Question 5
As shown in the figure, three switches S1, SW, and SN3, where SWI is the root bridge, and link congestion occurs between SI and SW2, SWD cannot receive the configuration BPDU sent by the root bridge, which spanning tree protection mechanism does the administrator need to configure to prevent the problem caused by link congestion? (Single choice questions).
A. PreventS TC-BPDU attacks
B. BPDU Protection
C. root protection
D. Loop Protection
Solutions:
| Question 1 Answer: B | Question 2 Answer: B | Question 3 Answer: A,C,D | Question 4 Answer: A,B,C,D | Question 5 Answer: D |
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