Best H12-821_V1.0-ENU Exam Dumps for the Preparation of Latest Exam Questions
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NEW QUESTION # 67
Which of the following descriptions about RP in PIM-SM are correct? (Multiple choice)
- A. Not all PIM routers in the network must know the address of the RP
- B. Only static RPs can specify which multicast groups the RP provides services for
- C. RP is used to process source DR registration information and group member joining requests
- D. Dynamic election of RP will involve two types of roles C-BSR and C-RP
Answer: C,D
NEW QUESTION # 68
Which of the following mechanisms or techniques can VRRP be combined with to monitor uplink connectivity? (Multiple choice)
- A. IP-Link
- B. BFD
- C. NQA
- D. Interface Track
Answer: A,B,C,D
NEW QUESTION # 69
A certain network structure and OSPF partitions are shown in the figure. In the figure, except RTA, RTB, RTC and RTD are all ABR routers.
- A. False
- B. True
Answer: A
NEW QUESTION # 70
When two routers exchange database information through DD messages, a master-slave relationship is first formed, and the router with the larger ID must be the master.
- A. True
- B. False
Answer: A
NEW QUESTION # 71
When OSPF runs in a broadcast network, it is necessary to elect DR and BDR.
So, in which of the following states, the election of DR and BDR will be carried out?
- A. Full status
- B. Exchange status
- C. 2-way status
- D. Init state
Answer: C
NEW QUESTION # 72
Regarding the dual-link hot backup configuration, when configuring the priority of the AC, the larger the priority value, the higher the actual priority of the AC.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 73
Which of the following VPN technologies is a Remote Access VPN?
- A. MPLS VPN
- B. IPsec VPN
- C. SSL VPN
- D. GRE Over IPsec
Answer: C
NEW QUESTION # 74
By default, the IS-IS Level1-1-2 router will advertise the detailed routing information of the Level1-2 area to the Level1-1 area to ensure that routers in the level-1 area can normally access devices in the backbone area.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 75
If a new member joins a multicast group in PIM-DM, which of the following descriptions are correct?
(Multiple choice)
- A. You can use the grafting mechanism to proactively establish a multicast distribution path in reverse direction to help new users receive multicast information.
- B. The multicast network needs to update the multicast distribution tree before it can send multicast data to group members.
- C. In PIM-DM mode, after using the "diffusion-pruning" method to establish a multicast distribution tree, the status refresh mechanism prevents the downlink interface from automatically recovering once it is suppressed.
- D. In existing networks, the method of waiting for the multicast routing table to time out and then flooding the entire network again is often used to help new users receive multicast information.
Answer: A,B
NEW QUESTION # 76
BGP prefers the route with the best Origin attribute value. The value of the Origin attribute is: EGP, IGP, ().
Answer:
Explanation:
incomplete
NEW QUESTION # 77
When the virtual router responds to the ARP request, use the real MAC address of the main router.
- A. False
- B. True
Answer: A
NEW QUESTION # 78
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
Answer: B,D
NEW QUESTION # 79
By default, the interval for sending BGP Keepalive packets is () s. (using Arabic numerals)
Answer:
Explanation:
60
NEW QUESTION # 80
Which of the following dynamic routing protocols can be applied to IPv6 networks? (Multiple choice)
- A. BGP6
- B. OSPFv3
- C. IS-ISv6
- D. Is-ls
Answer: B,C
NEW QUESTION # 81
The four routers run IS-IS and have established adjacency. The area numbers and router levels are shown in the figure. Which of the following is correct?
- A. The LSP of R3 does not exist in the LSDB of the R2 router
- B. The LSP of R4 does not exist in the LSDB of R3 router
- C. The LSP of R4 does not exist in the LSDB of router R1
- D. The LSP of R4 does not exist in the LSDB of the R2 router
Answer: C
NEW QUESTION # 82
By default, the OSPF port cost is related to the bandwidth of the port. The calculation formula is bandwidth-reference/ban dwidth. The cost is only calculated by OSPF itself and cannot be changed manually.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 83
When a device running BGP receives a BGP route and finds that its AS number is in the AS_Path, which of the following methods will it take?
- A. Discard directly
- B. Delete your own AS number in AS_Path and forward it.
- C. First notify the neighbor through a Notification message, and then discard the route.
- D. Forward directly to the peer
Answer: A
NEW QUESTION # 84
When two devices with the same priority compete for the Master role at the same time, the device with the interface with the smaller IP address should be selected as the Master device.
- A. False
- B. True
Answer: A
NEW QUESTION # 85
The following statements about the election of the active port in link aggregation LACP mode. Which one is correct?
- A. Only compare interface priority
- B. Compare device priorities
- C. Only compare interface numbers
- D. Compare the interface priority first, and continue to compare the interface number if it cannot be judged that it is better. The smaller the better.
Answer: D
NEW QUESTION # 86
Which of the following descriptions about the working process of VRRP is wrong?
- A. If the Master device fails, the Backup device will immediately switch to the Master device
- B. After the original Master device fails, the new Master device will immediately send ARP packets
- C. In the VRRP backup group, the Master device will be elected first according to the VRRP priority
- D. The stabilized Master device will periodically send notification messages
Answer: A
NEW QUESTION # 87
From the topology shown in the figure and the configuration on the interconnection port of the switch, it can be judged that the data frame tagged with VLAN10 can be forwarded normally between the two switches.
- A. False
- B. True
Answer: A
NEW QUESTION # 88
In network A, the two DRother devices will not establish an adjacency relationship, and their status will remain at 2-way.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION # 89
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