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Free Huawei H12-821 Practice Questions & Answers 2026 Part4 | HCIP-Datacom-Core Technology

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Question #1
See the network shown in the following figure. R1 and R2 run IS-IS, and establish an adjacency. IS-IS is enabled on Loopback0 of R2 but disabled on Loopback3 of R2. The configurations shown in the figure are performed in the IS-IS process of R2.Which of the following statements are true? (Choose all that apply.)
A. The routing table of R1 contains the route 10
B. The routing table of R1 does not contain the route 10
C. The routing table of R1 does not contain the routes 10
D. The routing table of R1 contains the route 10
View answer
Correct Answer: BD

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Question #2
Which of the following attributes cannot be directly referenced in an apply clause of a route-policy?
A. IP-prefix
B. origin
C. tag
D. community
View answer
Correct Answer: A
Question #3
Which of the following statements regarding the display bgp routing-table command output is true?
A. The route to the destination address 192
B. The MED value of the route to the destination address 192
C. The route to the destination address 192
D. The route to the destination address 192
View answer
Correct Answer: D
Question #4
On a broadcast IS-IS network shown in the following figure, a DIS needs to be elected to create and update pseudonodes. Which of the following routers is elected as the DIS?
A. R1
B. R3
C. R4
D. R2
View answer
Correct Answer: B
Question #5
A forwarding information database (FIB) can directly guide packet forwarding on a router.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #6
On the network shown in the figure, three switches run RSTR The figure shows the configuration.Which is the root switch?
A. Uncertain
B. SWA
C. SWB
D. SWC
View answer
Correct Answer: B
Question #7
Mechanisms such as sending active and standby service messages and retransmission can be used to prevent the HSB backup channel between the active and standby ACs from being interrupted and cannot be sensed.
A. ALSE
B. RUE
View answer
Correct Answer: A
Question #8
ASPF enables the firewall to support multi-channel protocols such as FTP and to define security policies for complex applications. Application Specific Packet Filtering (ASPF) is a feature that allows the firewall to understand and handle multi-channel protocols such as FTP, H.323, and SIP. ASPF inspects the control channel to dynamically create temporary rules for the data channels, enabling the firewall to secure and manage complex application protocols. This feature ensures that appropriate security policies are applied to these multi-channel applications .
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #9
When OSPFv3 runs on a Huawei router, the router automatically selects an interface address as the Router ID of the OSPFv3 process.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #10
BGP routers establish peer relationships using UDP.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #11
Which of the following statements regarding the MED value in BGP are true? (Choose all that apply.)
A. According to BGP route selection rules, the MED value has a lower priority than AS Path, Preferred-Value,Local-Preference, and Origin
B. The default MED value of BGP routes is 0
C. By default, BGP can compare the MED values of routes from different ASs
D. By default, if there is no MED value in routes, the value 0 is used
View answer
Correct Answer: ABD
Question #12
Which of the following statements regarding OSPF packets is false?
A. DD packets contain all LSA information and can be used to periodically synchronize LSOB information between neighbors
B. Hello packets are used to discover and maintain OSPF neighbor relationships and also can be used to elect DR and BDR on broadcast and NBMA networks
C. Two routers must send Hello packets at the same interval
D. DD packets carry LSA header information to describe link state summary information
View answer
Correct Answer: A
Question #13
On a broadcast or NBMA network, not all neighbors will establish adjacency relationships.
A. ALSE
B. RUE
View answer
Correct Answer: B
Question #14
Which of the following statements regarding the MED value in BGP are true? (Choose all that apply.)
A. According to BGP route selection rules, the MED value has a lower priority than AS Path, Preferred-Value,Local-Preference, and Origin
B. The default MED value of BGP routes is 0
C. By default, BGP can compare the MED values of routes from different ASs
D. By default, if there is no MED value in routes, the value 0 is used
View answer
Correct Answer: ABD
Question #15
The Rapid Spanning Tree Protocol (RSTP) defines four port roles. The Flags fields indicating the alternative and backup port roles in RST BPDUs are the same, that is, 01.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #16
Multiple BGP processes cannot be configured on the same router.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #17
Which of the following statements regarding authentication in BGP configuration is true?
A. A pair of BGP peers must use the same plaintext password
B. All BGP peers of a router must use the same password
C. All the routers in the same AS must use the same password
D. A pair of BGP peers must use the same MD5 password
View answer
Correct Answer: D
Question #18
See the command output of a router below.Which of the following statements are true? (Choose all that apply.)
A. The interface IP address is 10
B. The network type of the interface is broadcast
C. The router is a DR
D. The router ID is 10
View answer
Correct Answer: BCD
Question #19
Which of the following statements regarding the BGP error display of a router is false?
A. The error occurred at 11:40:39 on March 22, 2010
B. The neighbor address of this router is 10
C. The error may be caused by the incorrect peer AS number
D. Error Type indicates that the BGP error is caused by the neighbor relationship error
View answer
Correct Answer: C
Question #20
Which of the following statements regarding the MED value in BGP are true? (Choose all that apply.)
A. According to BGP route selection rules, the MED value has a lower priority than AS Path, Preferred-Value,Local-Preference, and Origin
B. The default MED value of BGP routes is 0
C. By default, BGP can compare the MED values of routes from different ASs
D. By default, if there is no MED value in routes, the value 0 is used
View answer
Correct Answer: ABD
Question #21
An IP prefix list is a common matching tool used in routing policies. Which of the following cannot be configured as matching conditions in an IP prefix list on a Huawei router? IP Prefix List Matching Conditions An IP prefix list matches based on: Mask: Specifies the subnet mask length. Action: Specifies whether to permit or deny. Index: Orders the rules within the prefix list. Port numbers are not applicable as matching conditions in an IP prefix list. HCIP-Datacom-Core Reference IP prefix list configurations are detailed in the routing policy and route filtering chapters.
A. Port number
B. Mask
C. Action
D. Index
View answer
Correct Answer: A
Question #22
According to BGP route selection rules, the route with the largest MED value is preferred.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #23
Which of the following statements regarding DR/BDR are false? (Choose all that apply.)
A. In a broadcast network, DR and BDR must be elected
B. All DR others establish neighbor relationships with DR and BDR only
C. DR others listen on the multicast address 224
D. DR others listen on the network address 224
View answer
Correct Answer: AD
Question #24
Which of the following statements regarding OSPF neighbor relationship and adjacency is true?
A. ot all neighbors can establish adjacencies
B. eighbor relationships are selected from adjacencies to exchange routing information
C. SPF routers must establish an adjacency before exchanging information
D. djacencies are maintained using OSPF DD packet
View answer
Correct Answer: A
Question #25
The native AC function allows an agile switch to integrate AC capabilities, achieving wired and wireless convergence. The agile switch centrally manages wired and wireless service traffic.
A. ALSE
B. RUE
View answer
Correct Answer: B
Question #26
See the network shown in the following figure. R1 and R2 run IS-IS, and establish an adjacency. IS-IS is enabled on Loopback0 of R2 but disabled on Loopback3 of R2. The configurations shown in the figure are performed in the IS-IS process of R2.Which of the following statements are true? (Choose all that apply.)
A. The routing table of R1 contains the route 10
B. The routing table of R1 does not contain the route 10
C. The routing table of R1 does not contain the routes 10
D. The routing table of R1 contains the route 10
View answer
Correct Answer: BD
Question #27
See the network shown in the following figure. R1 and R2 run IS-IS, and establish an adjacency. IS-IS is enabled on Loopback0 of R2 but disabled on Loopback3 of R2. The configurations shown in the figure are performed in the IS-IS process of R2.Which of the following statements are true? (Choose all that apply.)
A. The routing table of R1 contains the route 10
B. The routing table of R1 does not contain the route 10
C. The routing table of R1 does not contain the routes 10
D. The routing table of R1 contains the route 10
View answer
Correct Answer: BD
Question #28
Which of the following statements regarding the display bgp routing-table command output is true?
A. The route to the destination address 192
B. The MED value of the route to the destination address 192
C. The route to the destination address 192
D. The route to the destination address 192
View answer
Correct Answer: D
Question #29
Which of the following statements regarding the display bgp routing-table command output is true?
A. The route to the destination address 192
B. The MED value of the route to the destination address 192
C. The route to the destination address 192
D. The route to the destination address 192
View answer
Correct Answer: D
Question #30
Which of the following IEEE 802.11 standards is also known as Wi-Fi 6?
A. 802
B. 802
C. 802
D. 802
View answer
Correct Answer: D
Question #31
Which of the following statements regarding the BGP error display of a router is false?
A. The error occurred at 11:40:39 on March 22, 2010
B. The neighbor address of this router is 10
C. The error may be caused by the incorrect peer AS number
D. Error Type indicates that the BGP error is caused by the neighbor relationship error
View answer
Correct Answer: C
Question #32
When the MTUs of two interfaces connecting two routers in a broadcast network do not match, which of the following statements of two routers regarding OSPF neighbor state change is true?
A. The OSPF neighbor state remains Init
B. The OSPF neighbor state remains Exstart
C. The OSPF neighbor state can be Full
D. The OSPF neighbor state remains 2-way
View answer
Correct Answer: B
Question #33
Which of the following values can be used to set security levels of user-defined zones of USG series firewalls? (Choose all that apply.)
A. 40
B. 80
C. 100
D. 150
View answer
Correct Answer: ABC
Question #34
Which of the following attributes must be carried in an Update message?
A. local-Pref
B. MED
C. AS_Path
D. PrefVal
View answer
Correct Answer: C
Question #35
At which layer does a packet filtering firewall check data packets?
A. Data link layer
B. Network layer
C. Application layer
D. Physical layer
View answer
Correct Answer: B
Question #36
Which of the following statements regarding the MED value in BGP are true? (Choose all that apply.)
A. According to BGP route selection rules, the MED value has a lower priority than AS Path, Preferred-Value,Local-Preference, and Origin
B. The default MED value of BGP routes is 0
C. By default, BGP can compare the MED values of routes from different ASs
D. By default, if there is no MED value in routes, the value 0 is used
View answer
Correct Answer: ABD
Question #37
Which of the following statement regarding the display ospf peer command output is true?
A. Address: 10
B. Through negotiation during DD packet exchange, the local end becomes the slave
C. Router ID indicates that the local router ID Is 10
D. The DR address is 10
View answer
Correct Answer: A
Question #38
Which command is used to enable association between BFD and VRRP?
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
View answer
Correct Answer: A
Question #39
Which of the following statements regarding the display bgp routing-table command output is true?
A. The route to the destination address 192
B. The MED value of the route to the destination address 192
C. The route to the destination address 192
D. The route to the destination address 192
View answer
Correct Answer: D
Question #40
If a router ID is configured in both the system via and the BGP view, BGP uses the router ID configured in the BGP view because the BGP view takes precedence over the system view.
A. ATRUE
B. BFALSE
View answer
Correct Answer: A
Question #41
Which of the following statements regarding the MED value in BGP are true? (Choose all that apply.)
A. According to BGP route selection rules, the MED value has a lower priority than AS Path, Preferred-Value,Local-Preference, and Origin
B. The default MED value of BGP routes is 0
C. By default, BGP can compare the MED values of routes from different ASs
D. By default, if there is no MED value in routes, the value 0 is used
View answer
Correct Answer: ABD
Question #42
In OSPF, ABR does not flood Type 5 LSA and Type 4 LSA into the Stub area. It advertises a default LSA to the Stub area and guides the data packet on how to reach the destination outside the AS.
A. ALSE
B. RUE
View answer
Correct Answer: B
Question #43
The Rapid Spanning Tree Protocol (RSTP) defines four port roles. The Flags fields indicating the alternative and backup port roles in RST BPDUs are the same, that is, 01.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #44
Which of the following statements regarding the BGP error display of a router is false?
A. The error occurred at 11:40:39 on March 22, 2010
B. The neighbor address of this router is 10
C. The error may be caused by the incorrect peer AS number
D. Error Type indicates that the BGP error is caused by the neighbor relationship error
View answer
Correct Answer: C
Question #45
To prevent inter-area routing loops, OSPF does not allow advertising routing information between two non- backbone areas and allows advertising 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. TRUE
B. FALSE
View answer
Correct Answer: A
Question #46
Which of the following statements regarding the display bgp routing-table command output is true?
A. The route to the destination address 192
B. The MED value of the route to the destination address 192
C. The route to the destination address 192
D. The route to the destination address 192
View answer
Correct Answer: D
Question #47
Which of the following statements regarding the MED value in BGP are true? (Choose all that apply.)
A. According to BGP route selection rules, the MED value has a lower priority than AS Path, Preferred-Value,Local-Preference, and Origin
B. The default MED value of BGP routes is 0
C. By default, BGP can compare the MED values of routes from different ASs
D. By default, if there is no MED value in routes, the value 0 is used
View answer
Correct Answer: ABD
Question #48
By default, which of the following options is the maximum number of area addresses that can be configured in an IS-IS process?
A.
B.
C. 0
D.
View answer
Correct Answer: B
Question #49
Which of the following statements regarding the display bgp routing-table command output is true?
A. The route to the destination address 192
B. The MED value of the route to the destination address 192
C. The route to the destination address 192
D. The route to the destination address 192
View answer
Correct Answer: D
Question #50
Which of the following statements about multi-active detection (MAD) in a stack is false?
A. Two stacks can use the same domain ID when they function as MAD relay agents of each other
B. MAD relay detection requires that all stack members be connected to the MAD relay agent and the connected links be added to the same Eth-Trunk
C. MAD in direct mode can be implemented through intermediate devices or in full-mesh mode
D. MAD can be implemented in direct or relay mode
View answer
Correct Answer: A

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