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單項(xiàng)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

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1.單項(xiàng)選擇題 Refer to the exhibit. The user at Workstation B reports that Server A cannot be reacheD.What ispreventing Workstation B from reaching Server A?（）

A.The IP address for Server A is a broadcast address.
B.The IP address for Workstation B is a subnet address.
C.The gateway for Workstation B is not on the same subnet.
D.The gateway for Server A is not on the same subnet.

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2.多項(xiàng)選擇題下面對(duì)我國(guó)廣泛使用的DDN網(wǎng)絡(luò)描述正確的是什么？（）

A.DDN線路使用簡(jiǎn)便，覆蓋面廣
B.DDN專線是點(diǎn)到點(diǎn)的鏈路，它給予用戶訪問(wèn)整個(gè)鏈路帶寬的可能性
C.DDN相對(duì)于分組交換網(wǎng)絡(luò)來(lái)說(shuō)，線路費(fèi)用較高
D.DDN專線被廣泛用于企業(yè)網(wǎng)互連，專線internet接入

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3.多項(xiàng)選擇題下列所描述的協(xié)議哪些屬于OSI參考模型表示層協(xié)議（）。

A.ASCII、EBCDIC
B.IP、ARP
C.MAC、LLC
D.MPEG、MIDI
E.NFS、SQL
F.PICT、MPEG

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4.多項(xiàng)選擇題對(duì)全雙工以太網(wǎng)的描述正確的是（）。

A.可以在共享式以太網(wǎng)中實(shí)現(xiàn)全雙工技術(shù)
B.可以在一對(duì)雙絞線上同時(shí)接收和發(fā)送以太網(wǎng)幀
C.僅可以用于點(diǎn)對(duì)點(diǎn)連接
D.可用于點(diǎn)對(duì)點(diǎn)和點(diǎn)對(duì)多點(diǎn)連接

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5.多項(xiàng)選擇題以太網(wǎng)使用的物理介質(zhì)主要有（）。

A.同軸電纜
B.雙絞線
C.電纜
D.V24電纜

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