H12-821_V1.0 exam questions for practice in 2025 Updated 176 Questions [Q14-Q29] : Top Exam Collection : http://blog.topexamcollection.com

QUESTION 14
On an OSPF network, one router with P2P as the network type is directly connected to another router with P2MP as the network type. If the Hello intervals on the two routers are changed to be the same, neighbor relationship establishment and LSDB synchronization are not affected.

TRUE

FALSE

QUESTION 15
Which of the following statements regarding Local-Preference in BGP is true?

Local-Preference affects traffic that enters an AS.

Local-Preference can be transmitted between ASs.

The default Local-Preference value is 100.

Local-Preference is a well-known mandatory attribute.

QUESTION 16
Which of the following statements regarding BGP route advertisement are false?

All the BGP routes learned from all BGP peer will be advertised to other BGP peers.

Only the optimal routes preferred by BGP can be advertised to other BGP peers.

By default, the routes learned from an IBGP peer will not be forwarded to other IBGP peers.

Only the routes learned from IGPs can be advertised to other BGP peers.

QUESTION 17
Which of the following statements regarding OSPF is true?

OSPF does not have an acknowledgement mechanism. Therefore, OSPF relies on the upper-layer protocol, TCP, for acknowledgement.

OSPF performs LSDB update every 30 minutes.

OSPF uses the Bellman-Ford algorithm, and each router independently runs this algorithm.

OSPF floods a LSU packet at an interval of 5s.

QUESTION 18
As shown in the following figure, a new AP is deployed In dual link MSB networking (load balancing mode).
Which AC will the connect to?

AC1

Random access

None

AC2

QUESTION 19
Which three transmission modes are supported for IPv4 packets?

Anycast

Broadcast

Unicast

Multicast

QUESTION 20
Which of the following statements regarding DR/BDR are false?

In a broadcast network, DR and BDR must be elected. A broadcast network without a DR or BDR cannot operate normally.

DR others listen on the multicast address 224.0.0.5.

All DR others establish neighbor relationships with DR and BDR only.

DR others listen on the network address 224.0.0.6.

QUESTION 21
On an STP network, the root bridge, root port, and designated port are elected in sequence. The election rules of these ports are different. List the steps for electing the root port in sequence.

QUESTION 22
Which of the following statements regarding OSPF route summarization commands are true?

The asbr-summary command is executed in the OSPF view.

The abr-summary command is executed in the OSPF area view.

Advertise is the default parameter of the abr-summary command. That is, if not-advertise is not specified in the abr-summary command, the advertise parameter takes effect by default.

Not-advertise is the default parameter of the abr-summary command. That is, if advertise is not specified in the abr-summary command, the not-advertise parameter takes effect by default.

QUESTION 23
Which of the following TLVs is used by ISIS to describe the IP address of an interface?

129

131

128

132

QUESTION 24
Match the following IPv4 multicast protocols with the corresponding functions.

QUESTION 25
Which of the following statements about multicast packet forwarding is true?

If a multicast data packet fails the RPF check, the packet must have been received through a sub-optimal interface. However, this interface still receives and forwards the multicast traffic downstream.

IGMP snooping cannot control the scope of multicast traffic flooding on a Layer 2 network.

The source address of a multicast packet is a unicast address.

In multicast transmission, the destination address of a packet can be the unicast address of a host.

QUESTION 26
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?

Port number

Mask

Action

Index

QUESTION 27
A switch runs MSTP. The configuration is shown in the figure. What is the role of this switch in MSTI 1?

Uncertain

Root switch

Non-root switch

Secondary root switch

QUESTION 28
There are various types of VPNs, which can be applied to different layers. Which of the following network layers does SSL VPN belong to?

Network layer

Application layer

Transport layer

Data link layer

QUESTION 29
Which of the following statements about multicast packet forwarding is true?

If a multicast data packet fails the RPF check, the packet must have been received through a sub- optimal interface. However, this interface still receives and forwards the multicast traffic downstream.

IGMP snooping cannot control the scope of multicast traffic flooding on a Layer 2 network.

The source address of a multicast packet is a unicast address.

In multicast transmission, the destination address of a packet can be the unicast address of a host.