作者steter ()
看板TransCSI
标题问几个问题
时间Sat Jul 2 02:27:19 2005
1.True or False(12%)
a.A decimal computer is more powerful than a binary computer.
b.Selectors on a CD-ROM are wider at the edge than they are near the middle.
c.Aflash memory is nonvolatile.
d.If a host in the Internet receives an IP datagram that is not delivered for it, it simply discards the
datagram.
e.The IP address of the client and the server determine a TCP connection.
f.A programming language is a context-free language.
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f.O, Production rule限制左侧只能有一个nonterminal symbol:
α→β,α N且β (N∪T)*-λ.
完全不懂context-free是什麽意思
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9._____is a LAN technology that allows computers to contend for access to the network.
A.Ethernet B.WAP C.IP D.TCP E.Token ring
【解答】A
介质存取(medium access)技术
CSMA/CD:carrier sense multiple access with collision detection‧
使用於汇流排(bus)网路与树状(tree)网路‧
自由竞争(free contention),listen-before-talk‧
侦测到collision,发出jam讯号,退出,隔一段时间後再抢介质‧
以太(ethernet)网路‧
解答也完全看不懂,Ethernet不是一种架构吗,怎麽变一种技术
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12.To divide a network of class B into 256 subnet, the subnet mask(in dotted decimal) should be
_____.
A.255.255.255.192 B.255.255.192.0 C.255.255.255.0 D.255.192.0.0 E.255.0.0.0
【解答】C
28 = 256.
子网路遮罩(subnet mask):将IP网路位址分割成多个IP子网路,俾能对应多个实体网路。
在B类IP网路中使用子网路遮罩技术:
1 0 网路位址:
14位元 子网路位址:
8位元 主电脑位址:
8位元
则子网路位址的mask为:11111111.11111111.11111111.00000000(255.255.255.0)‧
遮罩的问题我一向不会
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一.解释名词(21%)
1.ARP 2.ICMP 3.RARP 4.CDMA/CA 5.Tunneling 6.TCP/IP 7.RS-232
5.Tunneling:
VPN(Virtual Private Network虚拟私人网路)客户端在本地端系统以及VPN Concentrator建立
一个加密的通讯通道(tunnel),这个通讯通道(tunnel)对於传送的资料保证其私密性
(confidentiality)以及完整性(integrity),准许使用者在本地端系统利用公用网路却可以安全
的连到该公司的网路。
Tunneling是什麽东西啊,从来没读到过
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◆ From: 140.119.195.4
※ 编辑: steter 来自: 140.119.195.4 (07/02 02:27)
※ 编辑: steter 来自: 140.119.195.4 (07/02 02:28)
1F:推 flyfound:这解答...来自补习班讲义是吧...218.166.203.245 07/02
2F:推 steter:对啊...是来自补习班 140.119.195.4 07/04
3F:→ flyfound:这老师特点是解答写一写忘了写正解 = = 要上课218.166.221.123 07/04