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多項(xiàng)選擇題Which of the following are associated with the application layer of the OSI model (Choose two.)（）。

A.ping
B.Telnet
C.FTP
D.TCP
E.IP

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1.單項(xiàng)選擇題對(duì)于10M以太網(wǎng)（）是目前使用最廣泛的以太網(wǎng)電纜標(biāo)準(zhǔn)，其優(yōu)點(diǎn)為：易于擴(kuò)展，維護(hù)簡(jiǎn)單，價(jià)格低廉。

A.10BASE粗同軸電纜
B.10BASE-T
C.10BASE2細(xì)同軸電纜

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2.單項(xiàng)選擇題數(shù)據(jù)分段是OSI七層模型中的（）完成的

A.物理層
B.網(wǎng)絡(luò)層
C.傳輸層
D.接入層
E.分發(fā)層
F.數(shù)據(jù)鏈路層

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3.單項(xiàng)選擇題ISDN的物理線路是（）。

A.2B+D
B.30B+D
C.同軸電纜
D.普通電纜

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4.單項(xiàng)選擇題下列哪一條命令用于配置DCC的鏈路處于斷開狀態(tài)后，重新建立鏈接等待的時(shí)間？（）

A.dialer time ridle
B.dialer time rcompete
C.dialer time renable
D.dialer time rwait-carrier

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5.單項(xiàng)選擇題A network administrator must configure 200 switch ports to accept traffic from only the currently attached host devices. What would be the most efficient way to configure MAC-level security on all these ports?（）

A.Visually verify the MAC addresses and then telnet to the switches to enter the switchport-port security mac-address command
B.Have end users e-mail their MAC addresses. Telnet to the switch to enter the switchport-port security mac-address command
C.Use the switchport port-security MAC address sticky command on all the switch ports that have end devices connected to them
D.Use show mac-address-table to determine the addresses that are associated with each port and then enter the commands on each switch for MAC address port-security

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