H12-821_V1.0 Practice Test Questions Answers Updated 62 Questions [Q15-Q40]

H12-821_V1.0 Practice Test Questions Answers Updated 62 Questions

H12-821_V1.0 dumps & Huawei Other Certification Sure Practice with 62 Questions

NEW QUESTION 15
Which of the following attacks is not the network layer attack?

A. IP spoofing attack
B. ARP spoofing attack
C. ICMP attack
D. Smurf attack

Answer: B

NEW QUESTION 16
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. If the LS age of a LSA has reached the LSRefreshTime (30 minutes), any router can regenerate an instance of this LSA again.
C. The unit of this field is seconds. In a LSDB, the LS age of a LSA increases with time.
D. The unit of this field is seconds. In a LSDB, the LS age of a LSA decreases with time.

Answer: D

NEW QUESTION 17
When a routing policy is used to filter routes, which of the following route prefixes will be denied by the IP prefix below?

A. 1.1.1.1/24
B. 1.1.1.2/16
C. 1.1.1.1/32
D. 1.1.1.1/26

Answer: A

NEW QUESTION 18
To inject IGP routes into BGP routes, you can only use the network command.

A. TRUE
B. FALSE

Answer: B

NEW QUESTION 19
Which of the following TLVs is used by ISIS to describe the IP address of an interface?

A. 0
B. 1
C. 2
D. 3

Answer: A

NEW QUESTION 20
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. The cost of S4/0/0 is 20.
C. S4/0/0 sends IIH packets at the interval of 30s.
D. S4/0/0 supports IPv6.

Answer: C

NEW QUESTION 21
A monitoring plane usually comprises the monitoring units of main control boards and interface boards. This plane can monitor the system environment independently. Which of the following environment monitoring functions can be provided by the monitoring plane?

A. Temperature monitoring
B. Fan control
C. Voltage monitoring
D. System power-on and power-off control

Answer: A

NEW QUESTION 22
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. The default security level of the new zone is 1.
C. Two zones cannot be configured with the same security level.
D. The configured security level cannot be changed.

Answer: D

NEW QUESTION 23
Which of the following statements regarding the stateful inspection firewall is true?

A. When the stateful inspection firewall checks packets, packets of one same connection are not correlated.
B. Because UDP is a connectionless protocol, so the stateful inspection firewall cannot match UDP packets with the status table.
C. The stateful inspection firewall needs to match the rules for each incoming packet.
D. The stateful inspection firewall only needs to match the first data packet against a rule, and the subsequent packets of the connection are matched directly in the state table.

Answer: D

NEW QUESTION 24
Four routers run ISIS and have established adjacencies. The area IDs and router levels are marked in the following figure. If route leaking is configured on R3, which of the following is the cost of the route from R4 to 10.0.2.2/32?

A. 0
B. 1
C. 2
D. 3

Answer: C

NEW QUESTION 25
After which of the following parameters are modified does an IS-IS neighbor relationship need to re-established?

A. The cost of an IS-IS interface is changed.
B. The level of an ISIS interface is changed.
C. The interval at which an IS-IS interface sends IIH packets is changed.
D. The IP address of an ISIS interface is changed.

Answer: B

NEW QUESTION 26
Which of the following is the default interval at which the DIS on a broadcast IS_IS network sends CSNPs.

A. 0
B. 1
C. 2
D. 3.3

Answer: A

NEW QUESTION 27
Which of the following attribute must be carried in an Update message?

A. AS-Path
B. Local-pref
C. Prefval
D. MED

Answer: B

NEW QUESTION 28
Which of the following statements regarding BGP route advertisement are false?

A. Only the optimal routes preferred by BGP can be advertised to other BGP peers.
B. By default, the routes learned from an IBGP peer will not be forwarded to other IBGP peers.
C. Only the routes learned from IGPs can be advertised to other BGP peers.
D. All the BGP routes learned from all BGP peer will be advertised to other BGP peers.

Answer: A

NEW QUESTION 29
ON a stateful inspection Firewall where there is no session table, when the status detection mechanism is enabled and the second packet (CYN+ACK) of 3-way hadshakes reaches the firewall. Which of the following statements is true?

A. If the firewall security policy permits packets to pass, the session table is created.
B. By default, when status detection is disabled and the permit policy is configured packets can pass.
C. If the firewall security policy permits packets to pass, the packets can pass the firewall.
D. Packets must pass the firewall, and a session table is established.

Answer: A

NEW QUESTION 30
Which Of the following IEEE 802.11 standards is also known as Wi-Fi 6?

A. 802.11ac
B. 802.11ax
C. 802.11b
D. 802.11n

Answer: A

NEW QUESTION 31
The filter-policy 2000 export command is run in an ISIS process. Which of the following statements about the functions of a filter policy is false?

A. Controls the advertisement of routes generated by the device.
B. Is used together with the route import function to advertise some imported external routes to neighbors.
C. Filters LSPs to be advertised.
D. If this command is not run, the device by default advertises all routes that ISIS Imports form external routing protocols.

Answer: D

NEW QUESTION 32
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 learning stole docs not learn MAC addresses table.
B. The port in discarding state does not learn MAC addresses table.
C. The port In discarding or learning state does not forward data frames.
D. The port in discarding or learning state does not learn MAC addresses

Answer: D

NEW QUESTION 33
Which of the following statements regarding OSPF route summarization is false?

A. Route summarization can reduce routing information, decrease the routing table size, and improve router performance.
B. Route summarization is the process of summarizing routes with the same prefix into one route and then advertising only the summarized route to other areas.
C. OSPF supports two route summarization modes: ABR summarization and ASBR summarization.
D. Any router in OSPF can summarize routes.

Answer: A

NEW QUESTION 34
RSTP provides different functions in different scenarios. Which of the following statements Is false?

A. When the designated port enabled with root protection receives optimal RST BPDUs, the port enters the Discarding state and does not forward packets. If the port does not receive optimal RST BPDUs within a certain period of time, the port will automatically restore to the Forwarding state
B. If the edge port on the switch enabled with BPDU protection receives RST BPDU, the switch sets the edge port as a non-edge-port and triggers STP calculation
C. After TC-BPDU attack defense function is enabled, you can set the number of times the switch processes TC BPDUs within a certain period
D. The role of the designated port that is enabled with root protection cannot be changed

Answer: B

NEW QUESTION 35
An engineer sets the CAPWAP heartbeat detection interval to 20 of the active link before an active/standby switchover occurs?

A. 60s
B. 75s
C. 90s
D. 20s

Answer: D

NEW QUESTION 36
The Interface \P address and VRRP virtual IP address can be the same.

A. TRUE
B. FALSE

Answer: A

NEW QUESTION 37
In the OSPF protocol, inter-area route calculation involves only Router LSA, Network LSA, and Summary LSA.

A. FLASE
B. TRUE

Answer: B

NEW QUESTION 38
BFD control packets are encapsulated in UDP packets for transmission. What is the destination port number of multi-hop BFD control packets?