A.data link
B.network
C.physical
D.transport

A.RSTP significantly reduces topology reconverging time after a link failure.
B.RSTP expends the STP port roles by adding the alternate and backup roles.
C.RSTP port states are blocking，discarding，learing，or forwarding.
D.RSTP also uses the STP proprsal-agreement sequence.
E.RSTP use the same timer-baseed process as STP on point-to-point links.
F.RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.

A. 32768： 11-22-33-44-55-66
B. 32768： 22-33-44-55-66-77
C. 32769： 11-22-33-44-55-65
D. 32769： 22-33-44-55-66-78

A.PSK
B.AH
C.MD5
D.ESP

A. 802.1d
B. VTP
C. 802.1q
D. STP
E. SAP

A.telnet access does not require a password
B.nat
C.no broadcast
D.chanage of destination address in the ipv6 header
E.chanage of source address in the ipv6 header
F.autoconfiguration

A.to map a known DLCI to an IP address
B.to map a known IP address to a MAC address
C.to map known SPID to a MAC address
D.to map a known DLCI to a MAC address
E.to map a known IP address to a SPID
F.to map a known MAC address to an IP address

A.它指定VLAN999转发未做标记的流量。
B.它阻止VLAN999转发主干的流量。
C.它创建了一个VLAN999接口。
D.它指定VLAN999作为默认为所有未知标记的流量。

A.show frame-relay map
B.show frame-relay lmi
C.show inter serial
D.show frame-relay pvc

A.（Switch-1会丢弃该数据，因为它没有该MAC地址条目）
B.（Switch-1会泛洪该数据到所有的接口，除了该数据的源接口）
C.（Switch-1会发送ARP请求到所有的接口，除了该数据的源接口）
D.（Switch-1会往默认网关发送该数据）