第55題： 某寫字樓無線網絡采用相鄰兩間辦公室共用1個無線AP的設計方案，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
答案解析與討論：www.shc2b.com/st/53743693.html

第56題： 下列Wifi認證方式中，（）使用了AES加密算法，安全性更高。
A．開放式
B．WPA
C．WPA2
D．WEP
答案解析與討論：www.shc2b.com/st/5374411409.html

第57題： （）存儲方式常使用多副本技術實現(xiàn)數(shù)據(jù)冗余。
A．DAS
B．NAS
C．SAN
D．分布式
答案解析與討論：www.shc2b.com/st/5374525700.html

第59題： 以下關于網絡需求分析的說法中，錯誤的是（）。
A．應收集不用用戶的業(yè)務需求
B．根據(jù)不同類型應用的業(yè)務特性，歸納和梳理出各自的網絡需求
C．應撰寫輸出網絡系統(tǒng)規(guī)劃與設計報告
D．應充分考慮數(shù)據(jù)備份的網絡需求
答案解析與討論：www.shc2b.com/st/5374721428.html

第60題： 下列屬于網絡安全等級保護第三級且是在上一級基礎上增加的安全要求是（）。
A．應對登錄的用戶分配賬號和設置權限
B．應在關鍵網絡節(jié)點處監(jiān)視網絡攻擊行為
C．應具有登錄失敗處理功能限制非法登錄次數(shù)
D．應對關鍵設備實施電磁屏蔽
答案解析與討論：www.shc2b.com/st/537482268.html

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．authorized
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

答案解析與討論：www.shc2b.com/st/5374921435.html