Best Preparations of H12-821_V1.0-ENU Exam 2024 HCIP-Datacom Unlimited 966 Questions
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NEW QUESTION # 541
Which of the following description about BGP reliable routing updates is correct?
- A. BGP uses multicast updates
- B. BGP sends complete routing table information every time when a route is updated
- C. BGP works on top of UDP, and the transport layer protocol is 179
- D. BGP does not need to periodically advertise routing information
Answer: D
NEW QUESTION # 542
Which TLV does IS-IS use to describe the IP Interface Address?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 543
In the case of without enabling BGP path load sharing, which BGP routes will be sent to BGP neighbors?
- A. Only routes learned from IBGP
- B. Only the best route preferred by BGP
- C. Only routes learned from EBGP
- D. All BGP routes learned from all neighbors
Answer: B
NEW QUESTION # 544
Both policy routing and routing strategy can affect the forwarding process of data packets, but they affect the data packets in different ways. Policy routing is based on policy forwarding, based on the forwarding plane. The routing strategy is based on the control plane, serving routing protocols and routing tables.
- A. True
- B. False
Answer: A
NEW QUESTION # 545
Which of the following SA descriptions of various messages are wrong? (Multiple choice)
- A. DD only contains the summary information of LSA, that is, it contains LS Type, LS ID, Advertising Router and LS Sequence Number
- B. LS Update message contains complete LSA information
- C. LS Request message only has LS Type, Ls ID and Advertising Router
- D. LS Ack message contains complete LSA information
Answer: A,D
NEW QUESTION # 546
Which of the following description about verifying whether a received Hello message is legal is wrong?
- A. If the network type of the receiving port is broadcast, point-to-multipoint or NBMA, the Network Mask field in the received Hello message may be inconsistent with that of the interface.
- B. If the network type of the receiving port is a point-to-point type or a virtual link, the Network Mask field is not checked
- C. The RouterDeadIntera1 field in the received Hello message must be consistent with the configuration of the receiving port
- D. The E-bit in the Options field of the received Hello message must be consistent with the configuration of the relevant area
Answer: A
NEW QUESTION # 547
A switch will join the stack system, so the stack ID is manually configured to be 2 in advance, but after joining the stack system, the stack system assigns the stack ID to the switch to be 3 , and the GE0/0/2 interface of the switch is added to the stack system The interface number is GE___.
Answer:
Explanation:
3/0/2
NEW QUESTION # 548
The configuration command for VRRP and BFD linkage is:
- A. vrrp vrid 1 track bfd-session session-name 1 reduced 100
- B. vrrp vrid 1 track bfd-session-name 1 reduced 100
- C. bfd-session vrrp vrid 1 track session-name 1 reduced 100
- D. track vrrp vrid 1 bfd-session session-name 1 reduced 100
Answer: A
NEW QUESTION # 549
Which of the following states represents the established connection between peers in BGP?
- A. Active
- B. Connect
- C. Established
- D. Open
Answer: C
NEW QUESTION # 550
When configuring the BGP, if such a warning is generated: " BGPI6ESTABLISHED:OID[oid] The BGP FSM enters the Establishedstate", which of the following description is true?
- A. Explain that there is a problem due to OPEN message negotiation between BGP neighbors
- B. Explain that this type of alarm is generated due to TCP problems
- C. Indicates that the BGP neighbor has been established
- D. The warning message is abnormal and must be dealt with
Answer: C
NEW QUESTION # 551
In the OSPF routing domain, in broadcast networks and NBMA networks with at least two routers, one router must be designated as DR and the other as BDR.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION # 552
As shown in the figure, R1 and R2 are in a VRRP backup group, if R1 fails, which of the following actions will R2 perform?
- A. Switch to Master device after about 3.61 seconds
- B. Switch to Master device after about 0.61 seconds
- C. Switch to Master device after about 0.22 seconds
- D. Do nothing and keep the original state
Answer: A
NEW QUESTION # 553
How long is the default lease period of the DHCP address pool?
- A. 1 hour
- B. 1 month
- C. 1 day
- D. 1 week
Answer: C
NEW QUESTION # 554
Which description is wrong about the BGP Keepalive message?
- A. Keepalive message contains only one BGP data header
- B. Keepalive is periodically sent between two BGP neighbors
- C. By default, the keepalive interval is 180s
- D. Keepalive messages are mainly used to confirm the operating status of peer routers and the availability of links
Answer: C
NEW QUESTION # 555
When the IS-IS overhead type is Narrow, which of the following TLVs are used to carry IS-IS routing information inside and outside the routing domain? (Multiple choice)
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A,C
NEW QUESTION # 556
Which of the following statements about the concept of multicast is wrong?
- A. Multicast group members, multicast group members can be widely distributed anywhere in the network
- B. The group refers to the source, the sender of the information, and needs to join the multicast group to provide the forwarding of the group refers to the group message
- C. Multicast router: A router or a Layer 3 switch that supports Layer 3 multicast function
- D. Multicast group: A collection identified by an IP multicast address
Answer: B
NEW QUESTION # 557
In a stateful inspection firewall, when the stateful inspection mechanism is turned on, when the second packet (SHN+ACK) of the three-way handshake arrives at the firewall, if there is no corresponding session table on the firewall, which of the following statements is correct?
- A. By default, after the status function is turned off, and the permission policy is configured, you can pass
- B. If the firewall security policy allows packets to pass, the packets can pass through the firewall
- C. The message must pass through the firewall and establish a session table
- D. If the firewall security policy allows packets to pass, create a session table
Answer: A
NEW QUESTION # 558
Compared with routers and switching machines, what is the unique forwarding module of the firewall?
- A. MPU
- B. SPU
- C. Switch fabric board
- D. LPU
Answer: B
NEW QUESTION # 559
Which of the following descriptions about multicast routing are correct? (Multiple choice)
- A. Multicast routing protocols include IGMP protocol
- B. Multicast routing protocols are used to establish and maintain multicast routes, and forward multicast packets correctly and efficiently
- C. Multicast routing protocols are divided into intra-domain multicast routing protocols and inter-domain multicast routing protocols
- D. If an upstream neighbor or downstream neighbor on the multicast distribution tree is unreachable, it will cause multicast routing to re-converge
Answer: B,C,D
NEW QUESTION # 560
The route selection tool route-policy can filter and set BGP attributes based on pre-defined conditions, so it is often used to define policies for BGP Peer, and is often used during route generation.
By default, all unspecified the routes are rejected by the route-policy.
- A. True
- B. False
Answer: A
NEW QUESTION # 561
By default, the sending interval of BFD packets is ______ milliseconds, the receiving interval is
______ milliseconds, and the local detection is ______ times. (Please fill in Arabic characters)
Answer:
Explanation:
1000|1000|3
NEW QUESTION # 562
Which of the following statements about multicast is correct? (Multiple choice)
- A. RPF routes can only be elected from unicast routes
- B. The multicast destination MAC address is automatically generated according to the EUI-64 algorithm
- C. The range of multicast destination IP address is 224.0.0.0~239.255.255.255
- D. Through the RPF mechanism and the multicast routing protocol, the multicast network can finally form a multicast forwarding path without loops, suboptimal and repeated packets. This path can be called a multicast distribution tree
Answer: C,D
NEW QUESTION # 563
The four routers are running IS-IS and have established adjacency relationship. The area number and router level are marked as shown in the figure. R1 and R2 are PPP links, R2 is DIS. Which of the following statement is correct? (Multiple choice)
- A. R3 sends CSNP periodically to help achieve Level-2 LSDB synchronization
- B. If R1 sends an LSP message, R2 needs to send PSNP to confirm
- C. R2 sends LSP to R3 and R4 in unicast mode
Answer: A,B
NEW QUESTION # 564
When there are two ACs and multiple APs in the WLAN network, the network configuration of active and standby mode is to plan half of the APs to be AC1 as the main AC and AC2 as the backup AC, and the other half of the APs to plan AC2 as the main AC and AC1 as the backup AC, thereby improving the utilization of AC resources.
- A. FLASE
- B. TURE
Answer: B
NEW QUESTION # 565
There is an existing wireless access controller as a DHCP relay. If the DHCP client cannot dynamically obtain an IP address, which of the following reasons may be the cause? (Multiple choice)
- A. In the global view of the wireless access controller, no DHCP server group is bound
- B. In the interface view of the wireless access controller, no proxy DHCP server is specified
- C. In the interface view of the wireless access controller, no dhcp select relay is configured
- D. In the global view of the wireless access controller, the DHCP server function is not enabled
Answer: A,B,C,D
NEW QUESTION # 566
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