第1题:
Circuit-switching technology is used in Publish Switched Telephone Network(PSTN), Global System for Mobile Communications(GSM) and code Division Multiple Access (CMDA) .It is a ( ) information transfer mode.
A.connection oriented
B.connectionless
C.high bandwidth utilization
D.poor real-time
第2题:
A.Global System for Mobile
B.Global Style for Mobile
C.Gold System for Mobile
D.Global System Mobile
第3题:
第4题:
CDMA (Code Division Multiple Access)
第5题:
3G是()英文缩写,GSM的英文表示是Global System for Mobile Communications,汉语意思是全球移动通信系统。
第6题:
GSM(Global System for Mobile Communications)是指()
第7题:
GSM的英文全称是()
第8题:
All client computers on your company network run Windows 7 and are members of an Active Directory Domain Services domain. Your company policy requires that all unnecessary services be disabled on the computers. The Sales department staff has been provided with new mobile broadband adapters that use the Global System for Mobile Communications (GSM) technology. You need to ensure that portable computers can connect to the broadband GSM network. Which service should be enabled on the portable computers?()
第9题:
X.25.
Asynchronous transfer mode (ATM).
VoIP.
Public Switched Telephone Network (PSTN).
第10题:
话音交换技术
数据交换技术
集中交换技术
电路交换技术
第11题:
第12题:
第13题:
CDMA for cellular system can be described as follows. As with FDMA, each cell is allocated a frequency (71) , when is split into two parts, half for reverse (mobile unit to base station) and half for (72) (base station to mobile unit). For full-duplex (73) , a mobile unit both reverse and forward channels. Transmission is in the form. of direct-sequence spread (74) , which used a chipping code to increase the data rate of the transmission, resulting is an increased signal bandwidth. Multiple access is provided by assigning (75) chipping codes to multiple users, so that the receiver can recover the transmission of an individual unit from multiple transmissions.
A.ware
B.signal
C.bandwidth
D.domain
第14题:
第15题:
WCDMA英文全称是Wideband Code Division Multiple Access,其系统带宽、码片速率分别是(),()。
第16题:
GSM是以下哪个的简称()
第17题:
An alternative to plain old telephone service (POTS) would be:()
第18题:
公众电话交换网(PSTN,PuBlic SwitcheD Telephone Network)是承载话音业务的基础网络,其采用的技术是()。
第19题:
In a switched LAN network, what is the Spanning-Tree algorithm used for?()
第20题:
connection oriented
connectionless
high bandwidth utilization
poor real-time
第21题:
第22题:
Cisco IOS gateways provide services such as address translation and network access control for the devices on the networl
Cisco IOS gateways provide services such as bandwidth management and accounting
Cisco IOS gateways provide media termination and signal translation between the public switched telephone network (PSTN) and IP networks
Cisco IOS gateways provide zone management for all registered endpoints in the network
第23题: