多項選擇題Which two values are used by Spanning Tree Protocol to elect a root bridge? (Choose two.)()。

A.amount of RAM
B.bridge priority
C.IOS version
D.IP address
E.MAC address
F.speed of the links


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4.單項選擇題A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?()

A.This is a 10 Mb/s switch port.
B.This is a 100 Mb/s switch port.
C.This is an Ethernet port operating at half duplex.
D.This is an Ethernet port operating at full duplex.
E.This is a port on a network interface card in a PC

5.單項選擇題Which spread spectrum technology does the 802.11b standard define for operation?()

A.IR
B.DSSS
C.FHSS
D.DSSS and FHSS
E.IR, FHSS, and DSSS