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NEW QUESTION 55
Regarding root bridge protection, the following statements are correct:
- A. Root bridge protection is configured in port view
- B. The port will undergo a transition from the Listening state to the Forwarding state. During this period, if the port does not receive a better BPDU, the port will resume its original forwarding state.
- C. After the root bridge protection is configured, the ports receive high-priority BPDUs, and the status of these ports will be set to Listening and no longer forward packets
- D. When root bridge protection is not configured, the root bridge will lose its status as the root bridge if it receives a higher priority BPDU
Answer: A,B,C,D
NEW QUESTION 56
Regarding the configuration of Isolate-user-vlan and Super VLAN, the following description is correct
- A. After the local proxy ARP function is enabled on the Isolate-user-vlan interface, the intercommunication of hosts in different Secondary VLANs can be realized
- B. After the SuperVLAN and Sub VLAN mapping relationship is established, the system will prohibit the operations of adding/deleting ports and deleting VLANs to the Sub VLAN
- C. After enabling the local proxy ARP function on the SuperVLAN interface, the i-machines in different SubVLANs can communicate with each other
- D. After establishing the mapping relationship between Isolate-user-vlan and Secondary VLAN, the system will prohibit the operations of adding/deleting ports and deleting VLANs to the Secondary VLAN
Answer: C,D
NEW QUESTION 57
Among the SNMPv1 messages, the messages sent by the Agent to the NMS include:
- A. SetRequest
- B. GetResponse
- C. GetNextRequest
- D. GetRequest
- E. Trap
Answer: B,E
NEW QUESTION 58
In the networking model shown in the figure, if Accoing is received on RADIUsClient, the following statement may be correct.
- A. This message is a start-accounting response message
- B. The message is a stop-accounting response message
- C. The message is sent by RADIUS Server
- D. The message is sent by Host
Answer: B,C
NEW QUESTION 59
Which of the following aspects should be considered for the security of the campus network?
- A. Effectively identify legal and illegal users
- B. Effective management of network equipment and network topology
- C. Protect the physical circuit
- D. Effective access control
Answer: A,B,C,D
NEW QUESTION 60
Multicast applications are based on UDP, so multicast applications have the following shortcomings
- A. The problem of out-of-sequence arrival of multicast packets can be corrected
- B. No congestion control
- C. Repeated data packet reception
- D. Do your best to deliver, cannot guarantee low-latency application requirements
Answer: B,C,D
NEW QUESTION 61
In the basic AAA implementation structure shown in the figure, if the server group is configured to provide AAA security services to a certain business of the host, which of the following security functions can be implemented and completed by the AAA server group?
- A. Issue the access level of access users
- B. Record access traffic and duration
- C. Approved access user name and password
- D. Distribute the directories accessible to users
Answer: A,B,C,D
NEW QUESTION 62
When the router receives the multicast data, it searches the multicast forwarding table
- A. If the multicast data RPF interface does not match the inbound interface in the (S, G) entry, the router will update the inbound interface of the entry to the checked RPF
- B. If the corresponding (S, G) entry does not exist in the multicast forwarding table, the router discards the multicast data
- C. If there is a corresponding (S, G) entry in the multicast forwarding table, but the interface that the packet actually reaches does not match the inbound interface in the entry, the router discards the multicast data
- D. If there is a corresponding (S, G) entry in the multicast forwarding table, and the interface actually reached by the packet matches the inbound interface in the entry, the router forwards the multicast data
Answer: A,D
NEW QUESTION 63
The ports Ethemet1/0/1, Ethernet1/0/2 and Ethernet1/0/3 of the switch SWA are Access, Trunk and Hybrid ports respectively, and the PVID is VLAN10. After executing the command undo vlan10 on SWA, check the configuration of each port Can you see which of the following-configuration
- A. interfaceEthernet1/0/1
- B. All the above configurations are wrong
- C. interface Ethernet 1/0/2 port link-type trunk port trunk permit vlan 1
- D. interface Ethernet 1/0/2 port link-type trunk port trunk permit vlan 1 port trunk pvid vlan 10
- E. interfaceEthernet1/0/1 port access vlan 10
- F. interfaceEthernet1/0/3 port link-type hybrid port hybrid vlan 1 untagged
- G. interfaceEthernet1/0/3 port link-type hybrid port hybrid vlan 1 untagged port hybrid pvid vlan 10
Answer: A,D,G
NEW QUESTION 64
In the switching network as shown in the figure, all three switches only have the default VLAN1, the interconnection ports of the three switches are trunks, and all VLANs are allowed to pass, and the three switches have the global and port GVRP functions enabled. VLAN 10 is created on the switch SWA, VLAN 20 is created on the SWC, and the GVRP registration mode of the Ethemet1/0/1 port is set to Fixed on the switch SWA, and the status information of each Trunk port is checked on the three switches. The correct one is displayed below (Choose one or more)
- A. [SWA]display interface Ethernet 1/0/1 Ethernet1/0/1 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10, 20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
- B. [SWC]display interface Ethernet 1/0/1 Ethernetl/0/1 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10, 20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
- C. [SWB]display interface Ethernet 1/0/2 Ethernetl/0/2 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10, 20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
- D. [SWB]display interface Ethernet 1/0/1 Ethernetl/0/1 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10, 20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
Answer: B
NEW QUESTION 65
The advantages of modular network architecture include (choose one or more)
- A. Each module can be planned and deployed separately. The function of the network can be added or removed by adding or deleting modules, which is conducive to building a complex network
- B. It replaces the traditional hierarchical network model to facilitate network planning and deployment
- C. It is allowed to dynamically call IT resources through open interfaces to realize a standard, compatible, safe, intelligent and manageable IT application environment
- D. Allow different application functions or application systems to share data, resources and capabilities, and participate in business processes
Answer: A
NEW QUESTION 66
The following statements about RPT and SPT in PIMSM are correct:
- A. When multicast traffic is forwarded along the RPT, devices along the way have established (S, G) entries corresponding to the multicast source
- B. When the device switches from RPT to SPT, it sends a join message to the multicast source
- C. During the process of switching from RPT to SPT, the RP may receive two copies of multicast traffic arriving in the two directions of RPT and SPT. At this time, the RP will send a prune message upstream
- D. Compared with RPT, SPT makes multicast packets reach the receiver through the optimal path, which improves the efficiency of packet forwarding
Answer: B,D
NEW QUESTION 67
As shown in the network, the switches all run RSTP. Initially, SWA, SWB and SWC are interconnected. When the topology is stable, connect SWB and SWD, then the following statements are correct.
- A. After SWA receives the BPDU with TC set, it will clear the MAC address table and send RSTBPDU with TC set from E0/2
- B. SWB will clear the MAC addresses learned by ports E0/1 and E0/2 and send RST BPDUs with TC set from these two ports
- C. After SWC receives the BPDU with TC set, it will clear the MAC address learned by port E0/1 and send RST BPDU with TC set from this port
- D. SWB will send RST BPDU with TC set within twice the HelloTime
Answer: B,C,D
NEW QUESTION 68
In the switching network as shown in the figure, all three switches only have the default VLAN1, the interconnection ports of the three switches are trunks, and all VLANs are allowed to pass, and the three switches have the global and port GVRP functions enabled. VLAN 10 is created on the switch SWA, VLAN 20 is created on the switch SWC, and the GVRP registration mode of the Ethernet1/0/1 port on the switch SWA is set to Fixed, and the VLAN existing on the SWA is executed on the display vlan SWA (select one or Multiple)
- A. VLAN 10
- B. VLAN1
- C. VLAN20
Answer: A,B
NEW QUESTION 69
The host PCA, PCB and PCC are respectively connected to the GigabitEthernet1/0/1 port of the switch SWA UP, Ethernet1/0/2 and Ethernet1/0/3 ports, and their addresses are in the same network segment, i exchange & SWA are configured
[SWA]vlan 10
[SWA-vlan10]port ethernet 1/0/1
[SWA-vlan10]quit
[SWA]vlan 20
[SWA-vlan20]port ethernet 1/0/2
[SWA-vlan20]quit
[SWA]vlan 30
[SWA-vlan30]port ethernet 1/0/3
[SWA-vlan30]quit
[SWA]interface ethernet 1/0/1
[SWA-Ethernet1/0/1]port link-type hybrid
[SWA-Ethernet1 /0/1] port hybrid vlan 10 30 untagged
[SWA-Ethernet1/0/1]quit
[SWA]interface ethernet 1/0/2
[SWA-Ethernet1/0/2]port link-type hybrid
[SWA-Ethernet1 /0/2]port hybrid vlan 20 30 untagged
[SWA-Ethernet1/0/2]quit
[SWA]interface ethernet 1/0/3
[SWA-Ethernet1/0/3]port link-type hybrid
[SWA-Ethernet1 /0/3]port hybrid vlan 10 20 30 untagged
-Can judge __ (choose one or more) based on the above information
- A. PCB and PCC can communicate directly
- B. Two PCs cannot communicate with each other
- C. Intercommunication between PCA and PCC
- D. Intercommunication between PCA and PCB
- E. The configuration command is incorrect
Answer: A,C
NEW QUESTION 70
Regarding the comparison of unicast, multicast and broadcast, there are correct
- A. Compared with unicast, multicast can reduce link load
- B. Compared with broadcast, multicast can improve link utilization
- C. Compared with broadcast, multicast can reduce the burden of the source
- D. Compared with unicast, multicast can reduce the burden of the source
Answer: A,B,D
NEW QUESTION 71
The customer local area network switch SVVA is connected to multiple switches. If it is known that Monitor Link M is configured on the SWA, the switch SWA has the following configuration information:
[SWA]monitor-link group 1
[SWA-mtlk-group1] port gigabitethernet 1/0/1 uplink
[SWA-mtlk-group1] port gigabitethernet 1/0/2 uplink
[SWA-mtlk-group1] port gigabitethernet 1/0/3 uplink
[SWA-mtlk-group1] port gigabitethernet 2/0/1 downlink
It can be known from the above information
- A. GigabitEthernet1/0/1 port is Up, then GigabitEthernet 2/0/1 port will also be Up
- B. GigabitEthernet1/0/1 port is in Down state, then Gigabitethernet 2/0/1 port will also be in Down state
- C. GigabitEthernet1/0/2 port is in Down state, then GigabitEthernet 2/0/1 port will also be in Down state
- D. GigabitEthernet1/0/2 port is in Down state, then Gigabitethernet 2/0/1 port will also be in Down state
Answer: A
NEW QUESTION 72
The switch SWA uses the factory default configuration. Now the Ethernet 1/0/1 port of the switch SWA should be configured as a trunk port, the PVID is VLAN20, and VLAN10 is allowed. The following configuration process is correct.
- A. [SWA]interfaceEthernet 1/0/1 [SWA-Ethernet1/0/1]port link-type trunk [SWA-Ethernet1/0/1]port trunk pvid vlan 20 [SWA-Ethernet1/0/1]port trunk permit vlan 10 [SWA-Ethernet1/0/1]quit [SWA]vlan 10 [SWA-vlan10]quit[SWA]vlan 20
- B. [SWA]vlan10 [SWA-vlan10]quit [SWA]vian 20 [SWA-vlan20]quit [SWA]interface Ethernet 1/0/1 [SWA-Ethernet1/0/1]port link-type trunk [SWA-Ethernet1/0/1]port trunk pvid vlan 20 [SWA-Ethernet1 /0/1 ]port trunk permit vlan 10
- C. [SWA]vlan10 [SWA-vlan10]quit [SWA]vlan 20 [SWA-vlan20]quit [SWA]interface Ethernet 1/0/1 [SWA-Ethernet1/0/1]port access vlan 20 [SWA-Ethernet1/0/1]port link-type trunk [SWA-Ethernet1/0/1]port trunk permit vlan 10
- D. [SWA]vlan10 [SWA-vlan10]quit [SWA]vlan 20 [SWA-vlan20]port Ethernet 1/0/1 [SWA-vlan20]quit [SWA]interface Ethernet 1/0/1 [SWA-Ethernet1/0/1]port link-type trunk [SWA-Ethernet1/0/1]port trunk permit vlan 10
Answer: A,B
NEW QUESTION 73
Regarding the generation of TCN BPDUs, which of the following statements are correct
- A. When a port of the switch is selected as the designated port or root port, the switch will immediately send TCNBPDU
- B. If the Alternate port link of a switch in the network is broken, the switch will not generate TCN BPDUs
- C. If the designated port link of a switch in the network is broken, the switch must generate TCN BPDUs
- D. STP-enabled non-root bridge switch If a port is connected to a PC, when the port enters the Forwarding switch, no TCN BPDU will be generated
Answer: B
NEW QUESTION 74
In the networking shown in the figure, the interconnection lines between RT1, RT2, RT3 and RT4 are all 1000Mbps links except for the 10Mbps link sharing the Ethernet part, and the four routers run OSPF protocol to make the routing interoperable. The PIMSM protocol is running between them, and the RP is 1.1.1.1. There are receivers on the downstream interfaces of RT1 and RT2, and IGMP is enabled on the corresponding interfaces. Then, when the receiver (Received) sends a group join request, which of the following routers exist (*, G) table entry
- A. RT2
- B. RT3
- C. RT1
- D. RT4
Answer: A,B,C,D
NEW QUESTION 75
For the multicast distribution tree model, the correct statement below is ______.
- A. Each router on the RPT will maintain (*, G) entries
- B. Each router on the SPT will maintain (S, G) entries
- C. Different multicast sources take themselves as the root and independently establish RPTs
- D. Multicast distribution tree models are divided into SPT and RPT
Answer: A,B,D
NEW QUESTION 76
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