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NEW QUESTION # 262
Which of the following protocols can generate a multicast distribution tree?
- A. OSPF
- B. PIMv2
- C. BGP
- D. IGMPv2
Answer: B
NEW QUESTION # 263
As shown in the figure, three first-tier switches are interconnected with one HUB, and the STP function is enabled on the switches. Please refer to the figure below for the STP bridge ID settings of the switches. Others are default configurations.
Which option is incorrect in the following description?
- A. SWA is the root bridge in this simple network
- B. Both ports of SWA are designated ports and are in forwarding state.
- C. The G/0/2 port of SWA is blocked.
- D. The go/1 port of SWC is an Alternate port, which is blocked
Answer: B
NEW QUESTION # 264
All single switches in the stacking system are called member switches, which can be divided into different roles according to different functions. Please correspond the roles of the following member switches with their functions. (Drag and drop questions)
Answer:
Explanation:
NEW QUESTION # 265
After the IGMP proxy device receives a report message from a multicast group, if it does not find the corresponding multicast group, the IGMP proxy device will send a report message for the multicast group to the access device, and send it to the access device. Add the multicast group to the forwarding table.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION # 266
Which of the following descriptions about the Cluster List attribute in BGP is wrong?
- A. When RR receives a BGP route carrying the Cluster_List attribute, and the attribute value contains the Cluster_ID of the cluster , RR considers that there is a loop in this route, so it will ignore the update about this route
- B. Cluster_List is generated by the route reflector, which consists of a series of Cluster_ID
- C. When a route is reflected by the reflector, the Cluster_ID of the RR will be added to the Cluster_List attribute of the route
- D. The attribute is an optional transition type
Answer: D
NEW QUESTION # 267
The prefix list (IP-Prefix List) can match the IP address prefix length and mask length at the same time because it has three parameters: less-equal-value, mask-length and greater-equal-value, so which of the following can correctly describe the relationship between these three parameters?
- A. mask-length<=less-equal-value<=greater-equal-value<=32
- B. less-equal-value<=mask-length<=greater-equal-value<=32
- C. mask-length<=greater-equal-value<=less-equal-value<=32
- D. greater-equal-value<=less-equal-value<=mask-length<=32
Answer: C
NEW QUESTION # 268
A certain router runs IS-IS, and its output information is shown in the figure. Which of the following statements is wrong?
- A. The System-ID of the neighbor router is 0002.0200.2002
- B. The area code of this router is 49.0001
- C. The Router System-lD is 0100.0000.1001
- D. This router is DIS
Answer: D
NEW QUESTION # 269
Which of the following description about BGP, OSPF, ISIS is correct?
- A. BGP runs on the basis of UDP sessions, and the port number adopted is 179.
- B. BGP neighbor relationship is established on the basis of TCP session, and the port number adopted is 179.
- C. ISIS runs on the basis of the IF protocol, and the protocol number adopted is 89.
- D. OSPF runs on the basis of IP protocol, and the protocol number adopted is 90.
Answer: B
NEW QUESTION # 270
As shown in the figure, SW1 is the general root in the MSTP network, please configure the following switches with the IST domain root and main bridge.
Answer:
Explanation:
NEW QUESTION # 271
The FIB table is located on the data plane of the router, and each forwarding table entry specifies information such as the outgoing interface and the next-hop IP address to reach a certain destination.
Which of the following meanings does the B field in FLAG represent?
- A. Black hole routing
- B. Gateway routing
- C. Available routes
- D. Static routing
Answer: A
NEW QUESTION # 272
Which of the following attributes may not be included in the Update message of a BGP route?
(Multiple choice)
- A. MED
- B. AS_Path
- C. 0rigin
- D. Local_Preference
Answer: A,D
NEW QUESTION # 273
Which of the following are the advantages of using stacking and clustering technology to build a campus network? (Multiple choice)
- A. Business interruption time is greatly reduced
- B. Improved network equipment and link utilization
- C. Can effectively reduce network power consumption
- D. Simplifies network management and reduces the complexity of network deployment planning
Answer: A,B,D
NEW QUESTION # 274
The four routers run IS-S and have established adjacency. The area numbers and router levels are marked in the figure. Which of the following statements is correct?
- A. Both R2 and R3 will generate Level-1 LSPs with ATT set.
- B. R2 and R3 learn default routes from each other, and a routing loop occurs in the network.
- C. Both R2 and R3 will generate LSPs of Level 1-2 with ATT set.
- D. R1 does not have the LSP generated by R4, so R1 can only communicate with R4 through the default route.
Answer: A
NEW QUESTION # 275
ACL command ac1 [ number ] ac1-number [ match-order{ autol config} ] , where ac1-numnbe is used to specify the number of the access control list, and the value range of ac1-number of the basic access control list is ().
- A. 0~1000
- B. 1000~3999
- C. 2000 ~2999
- D. 3000~3999
Answer: C
NEW QUESTION # 276
Which of the following information is the real-time backup data of HSB business? (Multiple choice)
- A. DHCP address information
- B. User Data Information
- C. CAPWAP tunnel information
- D. AP entry
Answer: A,B,C,D
NEW QUESTION # 277
The BFD control message is encapsulated in a UDP message for transmission, so the destination port number of the multi-hop BFD control message is?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 278
Which of the following descriptions about BGP neighbors is wrong? (Multiple choice)
- A. BGP routers support automatic neighbor discovery
- B. BGP establishes a neighbor relationship and needs to exchange link state information first
- C. BGP needs to establish a UDP connection before establishing a neighbor
- D. BGP must configure MD5 authentication to establish neighbors
Answer: A,B,C,D
NEW QUESTION # 279
The route selection tool route-policy can filter and set BGP attributes based on pre-defined conditions, so it is often used to define policies for BGP Peer, and is often used during route generation.
By default, all unspecified the routes are rejected by the route-policy.
- A. False
- B. True
Answer: B
NEW QUESTION # 280
A socket is composed of a 5-tuple, so which of the following options does not belong to the scope of the 5-tuple?
- A. Source IP
- B. Source MAC
- C. Destination port
- D. Destination IP
Answer: B
NEW QUESTION # 281
By default, which of the following options is the maximum number of area addresses that can be configured in an IS-IS process?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 282
What advantages does the application of jumbo frames bring to communication? (Multiple choice)
- A. Effectively improve forwarding efficiency in Gigabit Ethernet
- B. Reduce the CPU usage of the device and improve the forwarding performance of the device
- C. Reduce delay in video communication transmission, the impact of jitter on business
- D. Ensuring the integrity and reliability of data during network communication
Answer: A,B,C,D
NEW QUESTION # 283
Which of the following descriptions about the router's LSA processing principles are correct? (Multiple choice)
- A. If an LSA already exists in the local LSDB of the router and an updated LSA is received at this time, the local LSDB will be updated and the updated LSA will be flooded out
- B. If the received LSA is damaged, such as Checksum error, the LSA will not be received
- C. If multiple instances of an LSA are received, the priority is to check whether the checksums are the same, if not, the larger one is preferred
- D. If the router receives an LSA that does not exist locally, it updates the LSDB and uses DD packets to flood the LSDB
Answer: A,B
NEW QUESTION # 284
Which of the following default route distribution methods does OSPF support? (Multiple choice)
- A. Can only be issued by force
- B. Can be issued on ABR
- C. Can be issued on ASBR
- D. It can be issued non-mandatory
Answer: B,C,D
NEW QUESTION # 285
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