QUESTION 121
The following figure shows a campus network. IS-IS is configured on all routers on the network and runs normally. By default, which of the following routers have specific routes on the entire network?

A. R3
B. R1
C. R2
D. R7

Correct Answer: ACD
QUESTION 122
If an RR is deployed on a BGP network, which of the following reflection rules must the RR comply with?

A. The RR reflects only the optimal BGP routes that it uses.
B. It advertises the routes learned from EBGP peers to all clients and non-clients.
C. It advertises the routes learned from a client to all non-clients.
D. It advertises the routes learned from a non-client to all clients.

Correct Answer: BCD
QUESTION 123

A BGP device receives a route carrying an unknown attribute from a peer but does not know whether other devices need the attribute. In this case, the BGP device retains this attribute when advertising the route to other peers. Which of the following attributes is of this type?

A. MED
B. Community
C. Originator_ ID
D. AS_Path

Correct Answer: B
QUESTION 124
On a BGP network, which of the following configurations must be performed to establish indirectly connected EBGP peer relationships?

A. peer connect-interface
B. peer ignore
C. peer as-number
D. peer ebgp-max-hop

Correct Answer: CD
QUESTION 125
Which of the following statements is false about BGP?

A. Load balancing cannot be implemented because BGP selects only the optimal route.
B. BGP does not periodically advertises routing information.
C. If a router ID is configured in both the system view and BGP view, the router ID configured in the BGP view is preferred.
D. PrefVal is Huawei-specific and is valid only on the device where it is configured.

Correct Answer: A
QUESTION 126
The AS_Set attribute in BGP is used to prevent routing loops caused by route summarization. This attribute is an ordered AS_ Path attribute and records the ASs through which a summary route passes. When the summary route re-enters any As listed in the AS_ Set attribute, BGP detects that its AS number is in the AS_Set attribute of this route and discards this route. This prevents routing loops.

A. TRUE
B. FALSE

Correct Answer: B
QUESTION 127
In BGP, Notification messages are used to request peers to resend routing information after routing policies are changed.

A. TRUE
B. FALSE

Correct Answer: B
QUESTION 128
On an IP network, both PBR and routing policies are commonly used for routing and traffic control, but they are different from each other. Match PBR and routing policy with their functions. (Token is reusable)

Select and Place:

Correct Answer:

QUESTION 129
As shown in the figure, R1 imports the direct route 10.1.1.0/24 to OSPF. An engineer enables bidirectional route re-advertisement on R2 and R3, and configures the following commands on R3. After the network becomes stable, which of the following is the Pre value of the route 10.1.1.0/24 in the routing table of R4?

A. 150
B. 10
C. 15
D. 14

Correct Answer: B
QUESTION 130
When using a basic ACL to match routes, you need to configure the rule ID, action, and matching items. Which of the following can be used as matching items in the basic ACL?

A. Source/Destination IP address
B. Time range
C. Fragment information
D. Source/Destination MAC address

Correct Answer: BC

QUESTION 131
ACLs are a common matching tool in routing policies. An ACL can be configured on a router to match routes

A. TRUE
B. FALSE

Correct Answer: B
QUESTION 132
By default, the increment of a basic, advanced, or user-defined ACL used for route matching is 10.

A. TRUE
B. FALSE

Correct Answer: A
QUESTION 133
On the OSPF network shown in the figure, an adjacency has been established between R1 and R2. An engineer configures the commands in the figure on R2. In this case, which of the following routing entries may exist in the routing table of R2?

A. 10.1.1.0/24
B. 10.1.4.0/24
C. 10.1.3.0/24
D. 10.1.2.0/24

Correct Answer: B
QUESTION 134
On an RSTP network, if a port receives an RST BPDU and finds that its buffered RST BPDU is superior to the received RST BPDU, the port discards the received RST BPDU without responding.

A. TRUE
B. FALSE

Correct Answer: B
QUESTION 135
On the RSTP network shown in the figure, a link is added between SW1 (root bridge) and SW2. After SW2 receives an RST BPDU with the Proposal bit set to 1 from SW1, SW2 sets all of its ports to the synchronization state. Which of the following statements are true about the synchronization state of ports with different roles?

A. The designated port enters the Discarding state.
B. The alternate port enters the Discarding state.
C. The root port enters the Discarding state.
D. The edge port enters the Discarding state.

Correct Answer: AB
QUESTION 136
An edge port is a new port role added to RSTP to overcome the disadvantages of STP. Which of the following statements is false about this port role?

A. After receiving a configuration BPDU, the port is still in the Forwarding state.
B. The Up and Down states of the port do not cause network topology changes.
C. The port can directly enter the Forwarding state from the Discarding state.
D. The port does not participate in RSTP calculation.

Correct Answer: B
QUESTION 137
During routine O&M, the administrator of an enterprise checks the IGMP configuration on a router interface. The configuration is as follows:

A. The maximum response time to Query messages is 10s.
B. The IP address of the interface is 192.168.1.1.
C. The IGMP version is IGMPv2.
D. The interval for sending Group-Specific Query messages is 60s.

Correct Answer: ABC
QUESTION 138
IGMP has three versions. Different versions support different features. Which of the following features is supported by all versions?

A. Report message
B. Group-Specific Query message
C. leave message
D. Specifying a multicast source

Correct Answer: A

QUESTION 139
Which of the following statements are true about IP multicast service models?

A. In the ASM model, an ASM group can be used by only one multicast application.
B. Multicast service models differ for receiver hosts but do not affect multicast sources.
C. In the SSM model, different multicast applications on the same source can use the same SSM group.
D. In the SSM model, an (S, G) entry is generated for each source-group pair.

Correct Answer: CD
QUESTION 140
Multicast devices do not independently maintain unicast routing information on the network. The devices must perform RPF checks on the received packets according to the unicast routing information on the network before creating PIM routing entries. If there is no unicast route to a specific destination, the RPF check fails.

A. TRUE
B. FALSE

Correct Answer: A