未分类题

●下列拓扑结构中，全属于广播式网络的拓扑结构的是 (65) 。
①星型②网状型③环型④总线型
⑤卫星通信型⑥树型
(65)
D.②④⑤⑥

A.①②④⑥
B.①③⑤⑥
C.③④⑤⑥

【参考答案】

C
【解析】网络拓扑可以根据通信子网中通信信道的类型分为两类。
（1）点-点线路通信子网的拓扑。......

(↓↓↓ 点击下方‘点击查看答案’看完整答案 ↓↓↓)

<上一题目录下一题>

热门试题

未分类题

●In the following essay, each blank has four choices.Choose the best answer and write down on the answer sheet.Communicating via Email is by far the most common Internet activity.You can (71) with anyone in the world who has an Internet address or Email (72) with a system connection to the Internet.All you need is (73) the Internet and an Email program.Two of the most widely used Email programs are Microsoft's (74) and Netscape's Navigator.A typical Email message has three basic (75) : header, message, and signaturE.(71) A.connectB.exchangeC.communicateD.game(72) A.accountB.No.C.userD.administrator(73) A.attach withB.graspC.possessD.access to(74) A.YahooB.ExplorerC.FoxmailD.Outlook Express(75) A.packetsB.elementsC.framesD.cells

A.Choose
B.
Communicating
C.You
D.All
E.Two
F.A
G.
(71)
H.connect
I.exchange
J.communicate
K.game
(72)
L.account
M.No.
N.user
O.administrator
(73)
P.attach
Q.grasp
R.possess
S.access
T.Yahoo
U.Explorer
V.Foxmail
W.Outlook
X.packets
Y.elements
Z.frames
[.cells

单项选择题

某企业四月的营业额比三月的营业额多三分之一，五月的营业额比四月多三分之一，则三月的营业额比五月的营业额少:

A.1/6
B.2/3
C.7/9
D.7/16

相关试题