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多項(xiàng)選擇題Which of the following statements are true regarding bridges and switches?（）

A.Switches are primarily software based while bridges are hardware based.
B.Both bridges and switches forward Layer 2 broadcasts.
C.Bridges are frequently faster than switches.
D.Switches have a higher number of ports than most bridges.
E.Bridges define broadcast domains while switches define collision domains.
F.Both bridges and switches make forwarding decisions based on Layer 2 addresses.

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1.單項(xiàng)選擇題In the implementation of VLSM techniques on a network using a single Class C IP address, which subnet mask is the most efficient for point-to-point serial links（）。

A.255.255.255.0
B.255.255.255.240
C.255.255.255.248
D.255.255.255.252
E.255.255.255.254

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2.判斷題OSI中，鏈路層和傳輸層都是面向連接的，但鏈路層建立的是點(diǎn)到點(diǎn)的連接，傳輸層建立的是端到端的連接。

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3.單項(xiàng)選擇題IP地址與它的掩碼取反相與，所得的非零點(diǎn)分十進(jìn)制數(shù)是此IP地址的（）。

A.A類(lèi)
B.主機(jī)地址
C.網(wǎng)絡(luò)地址
D.解析地址

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4.單項(xiàng)選擇題While troubleshooting a connectivity problem, a network administrator notices that a port status LED on a Cisco Catalyst series switch is alternating green and amber. Which condition could this indicate（）。

A.The port is experiencing errors
B.The port is administratively disabled
C.The port is blocked by spanning tree
D.The port has an active link with normal traffic activity

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5.多項(xiàng)選擇題下列哪些接口可作邏輯通道？（）

A.X.25
B.幀中繼
C.dialer
D.同/異步串口

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6.多項(xiàng)選擇題What are some of the advantages of using a router to segment the network?（）

A.Filtering can occur based on Layer 3 information.
B.Broadcasts are eliminated.
C.Routers generally cost less than switches.
D.Broadcasts are not forwarded across the router.
E.Adding a router to the network decreases latency.

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7.單項(xiàng)選擇題OSI中，哪些不是表示層功能？（）

A.數(shù)據(jù)加密
B.數(shù)據(jù)壓縮
C.密碼控制
D.數(shù)據(jù)格式轉(zhuǎn)換

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8.判斷題CSMA/CD網(wǎng)絡(luò)中，所有主機(jī)都可獨(dú)占網(wǎng)絡(luò)帶寬。

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9.多項(xiàng)選擇題Which of the following are true regarding bridges and switches?（）

A.Bridges are faster than switches because they have fewer ports.
B.A switch is a multiport bridge.
C.Bridges and switches learn MAC addresses by examining the source MAC address of each frame received.
D.A bridge will forward a broadcast but a switch will not.
E.Bridges and switches increase the size of a collision domain.

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10.單項(xiàng)選擇題What is the maximum data rate specified for IEEE 802.11b WLANs（）。

A.10Mbps
B.11Mbps
C.54Mbps
D.100Mbps

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