In the network shown in the figure, the network engineer found that the path between PC1 and PC2 is not the optimal path, and the cost value of each link is the same. Based on this analysis, which of the following routers may be the root bridge of this layer 2 network? (Multiple choice)

A. Sw2
B. SW3
C. SW1
D. SW4
正解:C,D
質問 2:
As shown in the figure, VLAN aggregation is deployed in a switching network, where Sub-VLAN
10 and Sub-VLAN 20 are added to Super-VLAN 100. If PC1 and PC2, PC1 and PC3 are to be able to communicate with each other, which of the following descriptions about the L3 Switch interface type and the VLAN that should be allowed is correct?

A. Both GE0/0/1 and GE0/0/2 are Trunk ports, and only VLAN 10 is allowed to pass.
B. GE0/0/1 is a Trunk port, allowing VLAN 10 and VLAN 20 to pass; GE0/0/2 is an Access port, and the PVID is set to VLAN 10
C. GE0/0/1 and GE0/0/2 are both access ports, and the PVID is set to VLAN10.
D. GE0/0/1 is an access port, and its PVID is set to VLAN 10; GE0/0/2 is a trunk port, and VLAN 10 is allowed.
正解:B
質問 3:
When executing a cutover project, network engineers can perform remote operations at the customer's network maintenance center and guide on-site construction personnel to complete hardware-related operations, such as powering on equipment and connecting equipment.
A. False
B. True
正解:B
質問 4:
Trap information is a notification generated by the system when a fault is detected. It mainly records system status information such as faults. If the network administrator wants to view Trap information through the command line, the SNMP agent function must be enabled first.
A. False
B. True
正解:B
質問 5:
The network administrator has deployed the DHCP snooping function on the access switch.
Which of the following solutions can be used to reduce the impact of attackers maliciously applying for IP addresses and causing DHCP Server denial of service? (Multiple choice)
A. Limit the number of MAC addresses learned by the switch interface through DHCP Snooping
B. Enable the device to generate static MAC entries for interfaces based on the DHCP Snooping binding table.
C. Set the interface on the switch that is connected to the legitimate DHCP server as a trusted interface
D. Configure DHCP Snooping to check the CHADDR field in the DHCP Request message
正解:A,B,D
質問 6:
In the Hub&Spoke network shown in the figure, Hub-PE can allow local AS number duplication through manual configuration to achieve correct routing transmission.

A. False
B. True
正解:B
質問 7:
Drag and Drop Question
In the preparation phase of a migration project, the software and hardware need to be checked.
Match the operation objects in the preparation phase with the corresponding operation contents.

正解:

質問 8:
The AS-path attribute is a private attribute of the BGP protocol. The "if-match as- path-filter" command is only valid for BGP routes.
A. False
B. True
正解:B
質問 9:
With the increase of business traffic, an enterprise needs to expand the backbone network transmission bandwidth. Which of the following methods can best meet this demand?
A. Modify the routing protocol related to the network layer and change the number of paths for routing protocol load sharing to the maximum value
B. Increase the number of tunnels between backbone network devices and enable HSB protection for these tunnels
C. Increase the number of interconnected links between backbone network devices and deploy link aggregation between backbone network devices
D. Add a high-performance forwarding switch and connect the ports that were originally directly connected to the backbone network to the same switch.
正解:C
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