H12-821_V1.0 Dumps PDF New [2022] Ultimate Study Guide [{qanumstr}]
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NEW QUESTION 19
Which of the following attribute must be carried in an Update message?
- A. Prefval
- B. MED
- C. AS-Path
- D. Local-pref
Answer: D
NEW QUESTION 20
Which of the following configurations are not mandatory when an administrator configures VRRP?
- A. Virtual IP address
- B. Preemption mode
- C. Virtual router priority
- D. Preemption delay
Answer: A
NEW QUESTION 21
Which of the following statements is false, based on the following IGMP information on an interface of RTA?
- A. The maximum time for response to Query messages is 10s.
- B. The interval for sending group-specific Query messages is 60s.
- C. The IGMP version is IGMPV2.
- D. The IP address of the interface is 192.168.1.1.
Answer: A
NEW QUESTION 22
Which of the following statements regarding the LSA age field are true?
- A. If the LS age of a LSA has reached the LSRefreshTime (30 minutes), the originator of this LSA needs to regenerate an instance of this LSA again.
- B. The unit of this field is seconds. In a LSDB, the LS age of a LSA decreases with time.
- C. If the LS age of a LSA has reached the LSRefreshTime (30 minutes), any router can regenerate an instance of this LSA again.
- D. The unit of this field is seconds. In a LSDB, the LS age of a LSA increases with time.
Answer: B
NEW QUESTION 23
BFD control packets are encapsulated in UDP packets for transmission. What is the destination port number of multi-hop BFD control packets?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 24
Which of the following attacks is not the network layer attack?
- A. IP spoofing attack
- B. ICMP attack
- C. ARP spoofing attack
- D. Smurf attack
Answer: C
NEW QUESTION 25
Compared with STP, RSTP defines the different port states. Which of the following statements regarding discarding and learning states are true?
- A. The port In discarding or learning state does not forward data frames.
- B. The port in discarding state does not learn MAC addresses table.
- C. The port In learning stole docs not learn MAC addresses table.
- D. The port in discarding or learning state does not learn MAC addresses
Answer: D
NEW QUESTION 26
IGMPV3 not only supports IGMPv1 General Query and IGMPv2 Group-Specific Query, and also IGMPv3 Source/Group-Specific Query.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 27
OSPF supports area authentication and interface authentication. If both authentication modes are configured, Interface authentication takes preference over area authentication.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 28
When two routers exchange LSDB information using DD packets, a master/slave relationship is formed first, the router with a larger router ID is the master, and determine the MS bit.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 29
A local router runs IS-IS and its command output is shown in the following figure. Which of the following statements is true?
- A. The circuit level of S4/0/0 is Level-1.
- B. S4/0/0 sends IIH packets at the interval of 30s.
- C. The cost of S4/0/0 is 20.
- D. S4/0/0 supports IPv6.
Answer: B
NEW QUESTION 30
Which Of the following IEEE 802.11 standards is also known as Wi-Fi 6?
- A. 802.11b
- B. 802.11ac
- C. 802.11ax
- D. 802.11n
Answer: B
NEW QUESTION 31
To prevent inter-area routing loops, OSPF does not allow advertising routing information between two non-backbone areas and allows sing routing information only within an area or between the backbone area and a non-backbone area. Therefore, each ABR must be connected to the backbone area.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 32
Which of the following statements regarding the BGP error display of a router false?
- A. Error Type indicates that the BGP error is caused by the neighbor relationship error.
- B. The neighbor address of this router is 10.1.1.5.
- C. The error occurred at 12:40:39 on March 22, 2010.
- D. The error may be caused by the incorrect neighbor address.
Answer: A
NEW QUESTION 33
What parameters can a DHCP6 server assign to a DHCPv6 client?
- A. Gateway address
- B. IPV6 address/prefix
- C. SNTP server address
- D. DNS server address
Answer: C
NEW QUESTION 34
Which of the following statements regarding the firewall zone security level is false?
- A. Only the security level of the user-defined zone can be configured.
- B. Two zones cannot be configured with the same security level.
- C. The default security level of the new zone is 1.
- D. The configured security level cannot be changed.
Answer: D
NEW QUESTION 35
Which of the following statements regarding BGP route advertisement are false?
- A. Only the routes learned from IGPs can be advertised to other BGP peers.
- B. All the BGP routes learned from all BGP peer will be advertised to other BGP peers.
- C. By default, the routes learned from an IBGP peer will not be forwarded to other IBGP peers.
- D. Only the optimal routes preferred by BGP can be advertised to other BGP peers.
Answer: D
NEW QUESTION 36
Which of the following PIM protocol packets have unicast destination addresses.
- A. Graft
- B. Assert
- C. Register Stop
- D. Bootstrap
Answer: A
NEW QUESTION 37
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