软设天天练第32期(页 1) - 计算机水平考试论坛--- （首席版主：hj20040801） - 软件设计师(原高级程序员） - 考试吧综合考试论坛 - 万人在线第一考试社区

月光族 发表于 2007-9-5 09:23

软设天天练第32期

●Networks can be interconnected by different devices in the physical layer networks can be connected by _(66)_ or hubs .which just move the bits from one network to an identical network. One layer up we find bridges and switches which operate at data link layer. They can accept _(67)_ examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process in me network layer ,we have routers that can connect two networks, If two networks have _(68)_ network layer, the router may be able to translate between the packer formats. In the transport layer we find transport gateway, which can interface between two transport connections Finally, in the application layer, application gateways translate message _(69)_ .As an example, gateways between Internet e-mail and X.400 e-mail must _(70)_ the e-mail message and change various header fields. 　　（66）A．reapers　　　B．relays　　  C．packages　　　D．modems 　　（67）A．frimes              B．packets　　C．packages　　　D．cells 　　（68）A．special　　　B．dependent　C．similar　　　  D．dissimilar 　　（69）A．syntax　　　 B．semantics　C．language　　　D．format 　　（70）A．analyze　　　B．parse　　　C．delete　　　　D．create

月光族 发表于 2007-9-5 09:23

答案：**** Hidden Message *****

liugmwx 发表于 2007-9-5 22:38

fjutjw 发表于 2007-9-6 22:44

D

fscience 发表于 2007-9-8 12:12

看下．

loveyoumm 发表于 2007-9-15 22:42

tre

loveyoumm 发表于 2007-9-15 23:01

最怕英语拉

25933911 发表于 2007-9-25 15:07

A?ACD?BB错的稀里哗啦
[align=right][color=#000066][此贴子已经被作者于2007-9-25 15:08:07编辑过][/color][/align]

cjcww 发表于 2007-10-12 17:04

看看

lazio536 发表于 2007-10-13 19:57

AACDA

yhxman 发表于 2008-4-29 07:34

A
A
d
Db

purplebolt 发表于 2008-5-7 16:45

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我还需要学习我还需要学习

atomorrow 发表于 2008-9-3 14:33

D

C

C

D

A

suxc1982 发表于 2008-9-5 18:11

wo ding ding ing ddddddddddddddd

kitty322@ 发表于 2008-9-21 16:50

C A B C A(love03) (love03) (love03) (love03)

dzq1943 发表于 2008-10-14 17:44

过来练练英文我···:84)

herrylioi 发表于 2008-10-24 08:43

(love00) (love00) (love00) ddddddd

一张白纸 发表于 2008-10-24 09:00

(love04) (love04) (love04) (love04) (love04) (love04) (love04)

3642078 发表于 2008-11-2 14:04

放弃英文题了(love10)

liangfangfang 发表于 2008-11-3 19:59

(love00) (love00)

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软设天天练第32期

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