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試卷年份2013年下半年
試題題型【單選題】
試題內(nèi)容

IEEE 802.11標(biāo)準(zhǔn)采用的工作頻段是 (1) ,下列標(biāo)準(zhǔn)中采用雙頻工作模式的是 (2) 。
(1)
A.900MHz和800MHz
B.900MHz和2.4GHz
C.5GHz和800MHz
D.2.4GHz和5GHz
(2)
A.IEEE802.11a
B.IEEE802.11b
C.IEEE802.11g
D.IEEE802.11n

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A.多個邏輯鏈路聚合成一個物理鏈路
B.多個邏輯鏈路聚合成一個邏輯鏈路
C.多個物理鏈路聚合成一個物理鏈路
D.多個物理鏈路聚合成一個邏輯鏈路
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48題: POP3協(xié)議采用(1)模式進(jìn)行通信,當(dāng)客戶機(jī)需要服務(wù)時,客戶端軟件與POP3服務(wù)器建立 (2) 連接。
(1)
A.Browser
B.Client/Server
C.Peer to Peer
D.peer to Server
(2)
A.TCP
B.UDP
C.PHP
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49題: TCP協(xié)議使用(1)次握手過程建立連接,這中方法可以防止 (2) ,TCP使用的流量控制協(xié)議是 (3)。
(1)
A.一
B.二
C.三
D.四
(2)
A.出現(xiàn)半連接
B.出現(xiàn)錯誤連接
C.假冒的連接
D.無法連接
(3)
A.固定大小的滑動窗口協(xié)議
B.可變大小的滑動窗口協(xié)議
C.后退N幀ARQ協(xié)議
D.選擇性重發(fā)ARQ協(xié)議
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51題:

PC機(jī)不能接入因特網(wǎng),這時采用抓包工具捕獲的以太網(wǎng)接口發(fā)出的信息如下:

可以看出該P(yáng)C機(jī)的IP地址為(1),默認(rèn)網(wǎng)關(guān)的IP地址為 (2) ,PC不能接入Internet的原因可能是 (3) 。
(1)A.213.127.115.31
B.213.127.115.255
C.213.127.115.254
D.224.1.1.1
(2)A.213.127.115.31
B.213.127.115.255
C.213.127.115.254
D.224.1.1.1
(3)A.DNS解析錯誤
B.TCP/IP協(xié)議安裝錯誤
C.不能連接到網(wǎng)關(guān)
D.DHCP服務(wù)器工作不正常


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B.Linux
C.Unix
D.DOS
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B.networks
C.protocols
D.systems
(3)A.portability
B.a(chǎn)vailability
C.calability
D.reliability
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B.protocols
C.networks
D.a(chǎn)ddress
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B.compatibility
C.capability
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