As shown in the figure, STP is disabled on both switches, and Host A sends an ARP Request. Which is correct? (Muitiple choice)

• A.The MAC address table of these two switches will frequently jitter
• B.Repeated frames will appear in this network
• C.These two switches can achieve load balancing
• D.The CPU usage of these two switches will be very high.

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In standard STP mode, which of the following ports on non-root switches forward the BPDUs with TC bits set generated by the root switch?

• A.Root port.
• B.Backup port.
• C.Alternate port.
• D.Designated port.

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When two OSPF routers form a TWO-WAY neighbor relationship, the LSDB has completed synchronization, but the SPF algorithm has not been run.

• A.False
• B.True

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If the network shown in the following figure is used to enable loopback 0 communication between Router A and Router B through static routes, which of the following command should be entered in Router A?

• A.ip route-static 10.0.2.2 0 GigabitEthernet 0/0/0
• B.ip route-static 10.0.2.2 255.255.255.25510.0.12.1
• C.ip route-static 10.0.2.2 32 GigabitEthernet 0/0/0
• D.ip route-static 10.0.2.2 255.255.255.25510.0.12.2

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There is a TTL field in the header of the IP packet. Which of the following statement about this field is correct?

• A.This field is used for packet fragmentation.
• B.This field is used to indicate the priority of the packet.
• C.This field is used for packet anti-ring.
• D.The length of this field is 7 digits.

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