单项选择题

Refer to the exhibit A frame on vlan 1 on switch s1 is sent to switch s2 when the frame is received on vlan 2,what causes this behavior?（）

A.trunk mode mismatches
B.vlans that do not correspond to a unique IP subnet
C.native vlan mismatches
D.allowing only vlan 2 on the destination.

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多项选择题

Refer to the topology shown in the exhibit. Which ports will be STP designated ports if all the links are operating at the same bandwidth? （）

A.Switch A - Fa0/0
B.Switch A - Fa0/1
C.Switch B - Fa0/0
D.Switch B - Fa0/1
E.Switch C - Fa0/0
F.Switch C - Fa0/1

单项选择题

Which statement about vlan operation on cisco catalyst switches is true?（）

A.when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table.
B.unkown unicast frames are retransmitted only to the ports that belong to the same vlan
C.ports between switches should be configured in access mode so that vlans can span across the ports
D.broadcast and multicast frames are retransmitted to ports that are configured on different vlan.

单项选择题

assuming the default switch configuration which vlan range can be added modified and removed on a cisco switch?（）

A.2 through 1001
B.1 through 1001
C.1 through 1002
D.2 through 1005