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單項(xiàng)選擇題 Refer to the exhibit. What does the (*) represent in the output?（）

A.Packet is destined for a local interface to the router.
B.Packet was translated, but no response was received from the distant device.
C.Packet was not translated, because no additional ports are available.
D.Packet was translated and fast switched to the destination.

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1.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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2.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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3.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)來說，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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4.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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5.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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