[Mar-2023] 100% Actual H12-891_V1.0 dumps Q&As with Explanations Verified & Correct Answers
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NEW QUESTION 230
The following statement about ISIS (IPv6) is correct?
- A. By default, IS-IS has the multi-topology feature turned on
- B. To support the processing and computation of IPv6 routes, IS-IS has added NLPID to the 129TLV
- C. In order to support the processing and calculation of IPV6 routes, IS-IS has added TLV232, 236
- D. IS-IS works at the data link layer and only needs to add a new TLV to support IPv6
Answer: B,C,D
NEW QUESTION 231
Which of the following default routing delivery methods does OSPF support?( Multi-select)
- A. Can be issued on ABR
- B. It can be issued without force
- C. Issuance can only be enforced
- D. Answer can be issued on ASBR
Answer: A,B,D
NEW QUESTION 232
Port isolation technology deployed in Ethernet can realize Layer 2 interoperability and Layer 3 isolation, making networking more flexible.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 233
You want to set the DSCP value of VolP traffic in HW network devices to EF. According to the differentiated service model RFC, traffic token EF should be set to:
- A. IP ToS is set to OXEF
- B. Bitstream 101110
- C. DSCP is set to decimal 36
- D. IP Experimental ECN
- E. DSCP is set to decimal 5
Answer: B
NEW QUESTION 234
Is the following description of the BSR/RP mechanism correct?
- A. A C-BSR can also collect C-RP information by receiving C-RP packets
- B. PIM-SM domain can have more than one C-BSR, but only one BSR can be elected by the C-BSR that receives the C-RP Packets are collected C-one RP information
- C. BSR advertises BSR and C-RP information to all routers in the PIM-SM domain by flooding Bootstrap packets
Answer: A,B,C
NEW QUESTION 235
The network administrator is ready to use the 6to4 automatic tunnel to carry IPv6 data on the IPv4 network, and the IPv4 address of the router interface is 1381485210, so the corresponding tunnel address is
2001:8a0e:55d2:1:230:65ff:fe2:9a6?
- A. True
- B. False
Answer: B
NEW QUESTION 236
The following description of the attributes of BGP is correct? Radio
- A. The AS number of the adjacent AS, ranked to the far right of the list of AS_Path in the BGP route entry.
- B. A route can have only one community attribute value.
- C. Local_Pref is valid only between EBGP peers and is not advertised to third-party AS
- D. When a BGP Speaker publishes a route learned from an EBCP peer to an IBGP peer, it does not change the next hop attribute of that routing information.
Answer: D
NEW QUESTION 237
The basic header length of an IPv6 message is a fixed value.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 238
BGP can only automatically aggregate routes whose source is Incomplete.
- A. True
- B. False
Answer: A
NEW QUESTION 239
Router R1 runs the OSPF protocol, use the "display ip routing-table" command to view the routing table of the router R1, the following about the OSPF in the routing table Is the information described correctly?
- A. In the routing table, route table entries identified by the "OSPF" identifier can only be learned through LSAs of Type 3
- B. In the routing table, the routing table entry identified with the "O_ASE" identifier can only be learned by routing introduction
- C. In the routing table, the routing table entries identified by the "OSPF" identifier can be learned through the 1/2/3/5 LSA
- D. In the routing table, the routing table entries identified by the "OSPF" identifier can only pass Class 1 LSA
Answer: B
NEW QUESTION 240
An engineer used 2 routers to test IPv6 services and simulated the interconnection between headquarters and branches by running BGP4+. The network logic topology is shown in the figure, regarding the delivery of IPv6 routes between two devices, which of the following statements is wrong?
- A. When a route is passed, it carries a recognized mandatory attribute such as AS_Path
- B. BGP4+ passes routing information between peers via Update packet
- C. When routing is passed, the Next_Hop attribute must be an IPv6 global unicast address
- D. If the Update message carries the MP_REACH_NLRI attribute, it means that the advertisement is reachable route
Answer: C
NEW QUESTION 241
NSF (Non-StoppingForwarding) and non-stop circuits are transmitted NSR (Non-Stopping Routing) are two highly reliable solutions, and the following statement is correct
- A. NSF routers do not need to negotiate the ability to support NSF through specific messages
- B. After NSR enablement, if the business batch backup has not yet ended, a master board failure occurs, the NSR cannot be completed
- C. NSR backers require the ability to support NSR through specific message negotiation
- D. After NSF is enabled, the router is switched back, and the routing table and forwarding table remain unchanged, so traffic is not lost during grf time
Answer: B
NEW QUESTION 242
Configuration under a certain interface: isis timer hello 5 level-2, the following statement is correct?
- A. The hello packets sent at level-1 and Leve1-2 are both 5s
- B. The hello packets sent at level-1 are sent at 5s interval
- C. The level-2 hello packet send interval is 5s
- D. The CSNP packet sending interval for this interface Level-2 is 5S
Answer: C
NEW QUESTION 243
What is the wrong description of the function of OSPFv3 protocol authentication?
- A. OSPFv3 can only establish a security alliance SA using manual mode
- B. The OSPFv3 protocol header removes the Type and Automation fields
- C. Huawei router OSPFv3 IPSec authentication can not only support transmission mode, but also support tunnel mode
- D. OSPFv3 authentication relies on IPv6 packet authentication headers and encapsulation security net load headers
Answer: C
NEW QUESTION 244
Is the following description of ospf virtual links correct?
- A. The cost of a virtual connection is zero and is the optimal link
- B. A virtual connection can be established in any area, after which it itself belongs to the region
- C. Virtual links can be used to solve the problem of zone 0 being segmented
- D. The virtual connection ip is used as the link address
Answer: C
NEW QUESTION 245
?BGP4+?,Update ????M IP_R EACH_NLRI ?????next hop network address ????? ?
- A. You can carry a link-local address and a global unicast address
- B. at the same time Can only be a global unicast address
- C. Can only be a link-local address
- D. It can be just link-local address
Answer: A
NEW QUESTION 246
In PIM-SM, the description of RP is incorrectly ?
- A. The initial multicast streams for all groups in the shared tree are forwarded to the receiver via RP
- B. An RP can serve multiple multicast groups at the same time, a multicast group can correspond to multiple RPs
- C. All members of the group and the multicast sources that send multicast data to the group converge to the unique RP
- D. RPs can be responsible for the forwarding of several or all multicast groups, and there can be an RP in the network
Answer: B
NEW QUESTION 247
Which of the following statements about RADIUS is correct?( Single choice questions).
- A. RADIUS supports both wired and wireless access modes.
- B. RADIUS authentication and Portal authentication cannot be used together because the Portal server can typically be used to authenticate users when portal authentication is deployed.
- C. SEPARATION OF RADIUS PROTOCOL AUTHENTICATION, AUTHORIZATION, AND AUDIT.
- D. MAC authentication does not require a username password, so you cannot use RADIUS to authenticate the user.
Answer: A
NEW QUESTION 248
The following description of the Layer 6 functionality in the OSI reference model is correct?
- A. Establishing, maintaining, and terminating communication sessions
- B. Provides a common data compression and encryption scheme
- C. Synchronous communication
- D. Determines the availability of resources
Answer: B
NEW QUESTION 249
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