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QUESTION 1
Which statements about QinQ are true? (Choose two.)

A. QinQ saves VLANs on the public network.
B. To avoid VLAN conflict, the customer must negotiate with the service provider before modifying the VLANs on its private network.
C. When the service provider upgrades the network, the configurations on the user network do not need to be modified.
D. All of the above

Correct Answer: AC

QUESTION 2
Which statement about port isolation configuration is false?

A. Port isolation can be used for Layer 2 isolation.
B. In port isolation mode, ports are isolated at Layer 2 but can communicate at Layer 3 by default.
C. Before the port isolation function takes effect on an interface, the port isolation function must be enabled first.
D. The port-isolate enable command can run in the system view.

Correct Answer: D

QUESTION 3
Which statements about MUX VLAN are true? (Choose two.)

A. MUX VLAN contains a principal VLAN and subordinate VLANs. The principal VLAN and subordinate VLANs cannot communicate.
B. MUX VLAN contains a principal VLAN and subordinate VLANs. The subordinate VLANs are classified into subordinate separate VLANs and subordinate group VLANs. The interfaces in the subordinate group VLAN can communicate with each other.
C. The principal VLAN and subordinate VLANs can communicate.
D. The interfaces of different subordinate separate VLANs can communicate with each other, but cannot communicate with the interfaces in the principal VLAN.

Correct Answer: B,C

QUESTION 4
Two switches are directly connected to each other and they are working in full duplex mode. By default, RSTP will consider the link between the switches as point-to-point link.

A. True
B. False

Correct Answer: A

QUESTION 5
On the RSTP network with STP devices, which packets does an RSTP switch use to notify the STP switches of the topology change?

A. RSTP BPDUs with the TC flag
B. STP BPDUs with the TCN flag
C. RSTP BPDUs with the TCA flag
D. STP BPDUs with the TCA flag

Correct Answer: B
 

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