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NEW QUESTION 258
What mechanism does the IS-IS protocol use to ensure the reliability of neighbor relationship establishment on broadcast networks?
- A. Checksum
- B. Aging timer
- C. Status synchronization
- D. Three-way handshake
Answer: D
NEW QUESTION 259
Regarding the role of route filtering, the following description which is correct? (Multiple choice)
- A. Avoid routing loops caused by unused routing feedback.
- B. Suboptimal routes caused by route introduction cannot be avoided.
- C. Routing loops caused by inevitable inappropriate routing feedback.
- D. Can be used for precise route import and route advertisement control.
Answer: A,B,D
NEW QUESTION 260
Which description is correct about the LSA?
- A. The combination of LS sequence number, link state id and advertising router together identify an LSA
- B. The combination of LS TYPE, LINK STATE ID and ADVERTISING ROUTER together identify an LSA
- C. The combination of LS TYPE, LS SEQUENCE NUMBER and advertising router together identifies an LSA
- D. The combination of LS TYPE linke state id and LS sequence number together identify an LSA
Answer: B
NEW QUESTION 261
About the advantages of IGMP snooping, which of the following description is correct? (Multiple choice)
- A. IGMP consumes a large number of CPUs of Layer 2 switches and is not recommended.
- B. Provides convenience for individual billing for each user host.
- C. Reduce broadcast packets on Layer 2 networks and save bandwidth.
- D. The security of multicast information is enhanced.
Answer: B,C,D
NEW QUESTION 262
In the network shown in the figure, three switches run RSTP. The configuration is as shown in the figure.
According to the configuration in the figure, determine the root switch as:
- A. SWB
- B. SWC
- C. Unable to determine
- D. SWA
Answer: D
NEW QUESTION 263
Which of the following descriptions are correct about the preemption mechanism in the static LACP mode? (Multiple Choice)
- A. If the preemption delay configuration on the two ends is different, the system selects the value with the larger preemption delay on both sides as the preemption delay.
- B. The preemption mechanism of the static LACP mode is enabled by default.
- C. When a high-priority interface recovers due to failover and then resumes, if the preemption is enabled, the restored high-priority interface will become active again after a delay; if it is not enabled, Preemption, the interface does not automatically become an active interface.
- D. To prevent the entire link from being unstable due to frequent link status changes, set the preemption delay.
Answer: C,D
NEW QUESTION 264
IGMP Snooping operates at the data link layer to manage and control multicast groups and solves the problem of multicast messages broadcast at Layer 3.
- A. False
- B. True
Answer: A
NEW QUESTION 265
About multicast RPF check, which of the following statements is wrong? (Multiple Choice)
- A. Multicast RPF check is not rely on unicast routing.
- B. The router receives the multicast packet but fails the RPF check and discards the received multicast packet.
- C. All multicast protocols use RPF check.
- D. There are two RPF check functions. One is to prevent loops in multicast routes, the other is to prevent forwarding of redundant multicast data packets.
Answer: A,C
NEW QUESTION 266
The following is a section on the configuration of the master VLAN and the slave VLAN in the MUX VLAN. Which of the following about this configuration is correct? (Multiple Choice)
- A. VLAN 12 is an isolated slave VLAN
- B. VLAN 11 is the host VLAN
- C. Both VLAN 10 and VLAN 11 are MUX VLANs.
- D. VLAN 10 is the host VLAN
- E. Both VLAN 11 and VLAN 12 are slave VLANs
Answer: A,D,E
NEW QUESTION 267
A switch runs MSTP. The relevant configuration information is shown in the figure. According to the configuration of the command, it indicates that for Instance 1, the role of the switch is:
- A. Root switch
- B. Slave switch
- C. Cannot judge
- D. Non-root switch
Answer: A
NEW QUESTION 268
Which of the following parameters are not required when configuring BGP peers? (Multiple Choice)
- A. description
- B. IP Address
- C. password
- D. as-number
Answer: A,C
NEW QUESTION 269
When the BGP Notification packet Error Code is 2, it indicates that the OPEN message is incorrect. Which of the following error codes is included?
- A. 2 - Wrong peer AS number
- B. 4 - Wrong attribute list
- C. 3 - Bad BGP RID
- D. 1 - Unsupported version number
Answer: A,C,D
NEW QUESTION 270
When two routers establish a logical BGP peer through multiple physical links, you must use the peer connect-interface command.
- A. False
- B. True
Answer: B
NEW QUESTION 271
When the Hold Time parameter negotiated by the two BGP neighbors is 0, no Keeplive packet is sent.
- A. False
- B. True
Answer: B
NEW QUESTION 272
224.0.0.6 is the listening address of ALLD Router, 240.0.0.5 is the listening address of ALLSPFRouters.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 273
<Quidway>display current-configuration
#
multicast routing- enble
# interface Ethernet6/1/0
ip address 10.1.1.1 255.255.255.0
igmp timer query 40
#
igmp
#
return
The above information is a partial multicast configuration intercepted from a router. After the igmp enable command is configured on interface Ethernet6/1/0, the igmp transmission interval is () seconds after the querier is started.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 274
One of the features of OSPF is that it only supports MD5 authentication.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 275
IGMPv1 contains only two message types: membership query and membership report.
- A. False
- B. True
Answer: B
NEW QUESTION 276
In a company network environment, there are two switches SWA and SWB. The link aggregation LACP mode is adopted between the SWA and the SWB. There are three links added to the link aggregation, and the maximum number of active links is set to two. The system priority of the SWA is 4096. The system priority of the SWB is 32768. The interfaces of the three SWA links are G0/0/1, G0/0/2, and G0/0/3. The priority of the interface is 10, 20, 30. The interfaces of the three SWB links are G0/0/1, G0/0/2, and G0/0/3. The priority of the interface is 30, 20, and 10 respectively.
Which of the following conclusions are correct? (Multiple choice)
- A. SWB G0/0/2 and G0/0/3 are active interfaces
- B. SWA G0/0/1 and G0/0/2 are active interfaces
- C. SWA is active
- D. SWB is active
Answer: B,C
NEW QUESTION 277
As shown in the figure, the router ASBR1 (Router ID: 100.0.0.22) imports a RIP route 10.0.0.0/24. The LSDB of the router RT1 has the ASE LSA with the LS IS of 10.0.0.0 generated by ASBR1. However, the routing table of RT1 does not have a corresponding route. What are the possible reasons for the error? (Multiple Choice)
- A. Router RT1 does not have an OSPF External (ASE) route to the forwarding address 100.1.1.9.
- B. Router ASBR3 does not generate ASBR SUMMARY LSA with LSID 100.0.0.22 to Area 1.
- C. Router RT1 does not have an OSPF inter-area route to the forwarding address 100.1.1.9.
- D. Router ASBR2 does not generate ASBR SUMMARY LSA with LSID 100.0.0.22 to area 0.
- E. Router ASBR1 does not generate ASBR SUMMARY LSA with LSID 100.0.0.22 to Area 2.
- F. Router ASBR1 does not generate ASBR SUMMARY LSA with LSID 100.0.0.22 to Area 0.
Answer: B,C,F
NEW QUESTION 278
The authentication modes supported by the AR2200 are classified according to the encryption algorithm: no authentication, simple plain text verification, and MD5 authentication.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 279
Which of the following routes meet the following ACL conditions? (Multiple choices)
- A. 10.1.2.1/32
- B. 10.1.1.1/32
- C. 10.1.3.1/32
- D. 10.1.4.1/32
Answer: B,C
NEW QUESTION 280
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