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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判斷題

X.25作為國際通用標(biāo)準(zhǔn)的廣域網(wǎng)協(xié)議，內(nèi)置的差錯糾正，流量控制和丟包重傳機(jī)制使之具有高度的可靠性，由于數(shù)據(jù)吞吐率很低，包時(shí)延較大，故不適于在質(zhì)量差的信道上傳輸數(shù)據(jù)。

答案：錯誤

單項(xiàng)選擇題

What is the difference between a CSU/DSU and a modem?（）

A.A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line
B.A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line
C.A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line
D.A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line

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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？（）

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What is the difference between a CSU/DSU and a modem?（）

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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？（）