A.Designated Root Cost
B.bridge ID priority
C.max age
D.bridge ID MAC address
E.Designated Root Priority
F.forward delay
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A.VTP updates are ignored and forwarded out all ports
B.VTP updates are ignored and forwarded out trunks only
C.VTP updates are made to the VLAN database and are forwarded out trunks only
D.VTP updates are ignored and are not forwarded
A.8192
B.16384
C.49152
D.65535
A.enforce the placement of the root bridge in the network
B.ensure that a port is transitioned to a forwarding state quickly if a BPDU is received
C.enforce the borders of an STP domain
D.ensure that any BPDUs received are forwarded into the STP domain
Which picture is Traffic Shape， why ？
A.learning state
B.listening state
C.forwarding state
D.root-inconsistent state
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Refer to the exhibit.Which statement describes DLCI 17?（）
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As a CCNA candidate,you must have a firm understanding of the IPv6 address structure.Refer to IPv6 address,could you tell me how many bits are included in each filed?（）
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four switches， which one will be root switch.（no pic）.
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如何實(shí)現(xiàn)擁塞避免？