第60題： ( )存儲方式常使用NFS協(xié)議為Linux操作系統(tǒng)提供文件共享服務。
A.DAS
B.NAS
C.IP-SAN
D.FC-SAN
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第61題： 在網(wǎng)絡系統(tǒng)設計時，不可能使所有設計目標都能達到最優(yōu)，下列措施中較為合理的是( )。
A.盡量讓最低建設成本目標達到最優(yōu)
B.盡量讓最短的故障時間目標達到最優(yōu)
C.盡量讓最大的安全性目標達到最優(yōu)
D.盡量讓優(yōu)先級較高的目標達到最優(yōu)
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第62題： 在結(jié)構(gòu)化布線系統(tǒng)設計時，配線間到工作區(qū)信息插座的雙絞線最大不超過90米，信息插座到終端計算機網(wǎng)卡的雙絞線最大不超過( )米。
A.90
B.60
C.30
D.10
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第64題：

Network Addres Translation(NAT) is an Internet standard that enbles a local-area network to use one set of IP addresses for internet traffic and another set of ( ) IP addresses for external traffic. The main use of NAT is to limit the number of public IP addresses that an organization or company must use, for both economy and ( ) purposes. NAT remaps an IP address space into another by modifying network address information in the ( ) header of packets while they are in transit across a traffic routing device. It has become an essential tool in conserving global address space in the face of ( ) address exhaustion. When a packet traverses outside the local network, NAT converts the private IP address to a public IP address. If NAT runs out of public addresses，the packets will be dropped and ( )"host unreachable"packets will be sent.
(1) A. local
B. private
C. public
D. dynamic
(2) A. political
B. fairness
C. efficiency
D. security
(3) A.MAC
B. IP
C.TCP
D. UDP
(4) A. IPv4
B. IPv6
C. MAC
D. logical
(5) A. BGP
B. IGMP
C. ICMP
D. SNMP

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