第55題： 某寫字樓無線網(wǎng)絡(luò)采用相鄰兩間辦公室共用1個無線AP的設(shè)計(jì)方案，該方案可能會造成無線信號衰減，造成信號衰減的主要原因是（）。
A．傳輸距離太長
B．障礙物阻擋
C．天線太少
D．信道間互相干擾
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第56題： 下列Wifi認(rèn)證方式中，（）使用了AES加密算法，安全性更高。
A．開放式
B．WPA
C．WPA2
D．WEP
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第57題： （）存儲方式常使用多副本技術(shù)實(shí)現(xiàn)數(shù)據(jù)冗余。
A．DAS
B．NAS
C．SAN
D．分布式
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第59題： 以下關(guān)于網(wǎng)絡(luò)需求分析的說法中，錯誤的是（）。
A．應(yīng)收集不用用戶的業(yè)務(wù)需求
B．根據(jù)不同類型應(yīng)用的業(yè)務(wù)特性，歸納和梳理出各自的網(wǎng)絡(luò)需求
C．應(yīng)撰寫輸出網(wǎng)絡(luò)系統(tǒng)規(guī)劃與設(shè)計(jì)報(bào)告
D．應(yīng)充分考慮數(shù)據(jù)備份的網(wǎng)絡(luò)需求
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第60題： 下列屬于網(wǎng)絡(luò)安全等級保護(hù)第三級且是在上一級基礎(chǔ)上增加的安全要求是（）。
A．應(yīng)對登錄的用戶分配賬號和設(shè)置權(quán)限
B．應(yīng)在關(guān)鍵網(wǎng)絡(luò)節(jié)點(diǎn)處監(jiān)視網(wǎng)絡(luò)攻擊行為
C．應(yīng)具有登錄失敗處理功能限制非法登錄次數(shù)
D．應(yīng)對關(guān)鍵設(shè)備實(shí)施電磁屏蔽
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第61題： Network firewalls are security devices used to stolo or mitigate() access to private networks connected to the lnternet, especially intranets. The only traffic allowed on the network is defined via firewall ()-any other traffic attempting to access the network is blocked. Networkfirewalls sit at the () line of a network, acting as a communications liaison between intenal and extenal devices, When properly configured, a firewall allows users to access any of the resources they need while simultaneously keeping out unwanted accesses. In addition to limiting access to a protected computer and network, a firewall can () all traffic coming into or leaving a network, and manage remote access to a private network through seccure authentication certificates and logins. () firewalls examine every packet that passes through the network and then accept or deny it as defined by rules set by the user.
A．Unauthorized
B．a(chǎn)uthorized
C．normal
D．frequent
A．Ports
B．policies
C．commands
D．status
A．Front
B．back
C．second
D．last
A．Reply
B．block
C．log
D．encrypt
A．Application-layer
B．Packet filtering
C．Circuit-level
D．Proxy server

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