第62題： 配置路由器默認(rèn)路由的命令是（ ）。
A.iproute220.117.15.0255.255.255.00.0.0.0
B.iproute220.117.15.0255.255.255.0220.117.15.1
C.iproute0.0.0.0255.255.255.0220.117.15.1
D.iproute0.0.0.00.0.0.0220.117.15.
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第63題： 路由表如下圖所示，如果一個(gè)分組的目標(biāo)地址是220.117.5.65，則會發(fā)送給那個(gè)端口？

（ ）。

A.220.117.1.2
B.220.117.2.2
C.220.117.3.3
D.220117.4.4
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第64題： 一家連鎖店需要設(shè)計(jì)一種編址方案來支持全國各個(gè)門店銷售網(wǎng)絡(luò)，門店有300家左右，每個(gè)門店一個(gè)子網(wǎng)，每個(gè)子網(wǎng)終端最多50臺電腦，該連鎖店從ISP處得到一個(gè)B類地址，應(yīng)該采用的子網(wǎng)掩碼是（ ）。
A.255.255.255.128
B.255.255.252.0
C.255.255.248.0
D.255.255.255.224
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第66題： Traditional IP packet forwarding analyzes the （ 1）IP address contained in then network layee header of each packet as the 　packet rravels from its sourse to its final destination. A router analyzes the destination IP address independently at each hop in the network. Dynamic （ 2） protocols or staitic configuration builds the database needed to analyze the destination IP address(the routing table). The process of implementing traditional IP routing also is called hop-by-hop destination-based （ 3）routing. Although successful,and obviously widely deployed,certain restrictions,which have been realized for some time,exist for this method of packet forwarding that diminish its （ 4）.New techniques are therefore required to address and expand the functionality of an IP-based network infrastructure. This first chapter concertrates on idenfifying these restrictions.and presents a new architecture,known as multiprotocol（ 5）switching,that provides solutions to some of this restrictions.

( 1).A.datagram
B.destination
C.connection
D.service
( 2).A.routing
B.forwarding
C.transmission
D.managerment
( 3).A.anycast
B.multicast
C.broadcast
D.unicast
( 4).A.reliability
B.flexibility
C.stability
D.capability
( 5).A.cost
B.cast
C.mark
D.label

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