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單項(xiàng)選擇題OSI代表（）。

A.Organization for Standards Institute
B.Organization for Internet Standards
C.Open Standards Institute
D.Open Systems Interconnection

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1.單項(xiàng)選擇題What is the purpose of the inverse ARP？（）

A.to map a known DLCI to an IP address
B.to mapa known IP address to a MAC address
C.to map known SPID toa MAC address
D.to map a known DLCI to a MAC address
E.to map a known IP address to a SPID
F.to mapa known MAC address to an IP address

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2.單項(xiàng)選擇題X.25協(xié)議提供給用戶的可用的邏輯信道最多為（）條。

A.16
B.32
C.4095
D.4096

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3.單項(xiàng)選擇題The network administrator is asked to configure 113 point-to-point links.Which IP addressing scheme best defines the address range and subnet mask that meet the requirement and waste the fewest subnet and host addresses?（）

A.10.10.0.0/18 subnetted with mask 255.255.255.252
B.10.10.0.0/25 subnetted with mask 255.255.255.252
C.10.10.0.0/24 subnetted with mask 255.255.255.252
D.10.10.0.0/23 subnetted with mask 255.255.255.252
E.10.10.0.0/16 subnetted with mask 255.255.255.252

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4.單項(xiàng)選擇題X.25使用映射的作用是（）。

A.映射本地IP到對端端口值，以便路由器發(fā)送數(shù)據(jù)時(shí)確認(rèn)發(fā)送端口
B.映射本地IP到本地端口值，以便路由器發(fā)送數(shù)據(jù)時(shí)確認(rèn)發(fā)送端口
C.映射對端IP到本地端口值，以便X.25交換網(wǎng)絡(luò)查找數(shù)據(jù)發(fā)送路徑
D.映射對端IP到對端端口值，以便X.25交換網(wǎng)絡(luò)查找數(shù)據(jù)發(fā)送路徑

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5.填空題衡量網(wǎng)絡(luò)性能的主要標(biāo)準(zhǔn)是（）、（）。

參考答案：帶寬；延遲