In 8011 terminology．all communication was to go through the base station, called an(75)A．Access ChannelB．Access SystemC．Access PointD．Network Access Point
In 8011 terminology．all communication was to go through the base station, called an(75)
A．Access Channel
B．Access System
C．Access Point
D．Network Access Point
相关考题：
An informal communication network on a project and within an organization is called a(n):A free upward flowB free horizontal flowC unrestricted communication flowD grapevineE open network
4 An informal communication network on a project and within an organization is called a(n):A. free upward flowB. free horizontal flowC. unrestricted communication flowD. grapevineE. open network
Where shall I go through the formalities if I want to store my luggage here?A.You can store your luggage in the reception desk over thereB.You can store your luggage in the information room.C.You can store your luggage in the safe box of the bank.D.Luggage can be stored in the railway station and airport.
After reading the story, you can probably tell which of the following is NOT true?A. Mr. Green didn't go to the police station until the man got off his car and ran away.B. Mr. Green would go to the police station as soon as possible.C. The robber got out of Mr. Green's car at the outskirts of London safely.D. Mr. Green might not go to the police station unless he was wanted.
【An overall cellular network contains a number of different elements from the base transceiver station (BTS) itself with its antenna back through a base station controller (BSC), and a mobile switching centre (MSC) to the location registers (HLR and VLR) and the link to the public switched telephone network (PSTN). Of the units within the cellular network, the BTS provides the direct communication with the mobile phones. There may be a small number of base stations then linked to a base station controller. This unit acts as a small centre to route calls to the required base station, and it also makes some decisions about which of the base station is best suited to a particular call. The links between the BTS and the BSC may use either land lines of even microwave links. Often the BTS antenna towers also support a small microwave dish antenna used for the link to the BSC. The BSC is often co-located with a BTS. The BSC interfaces with the mobile switching centre. This makes more widespread choices about the routing of calls and interfaces to the land line based PSTN as well as the HLR and VLR.】 From the paragraph above, in a cellular network, the （98） can provide direct communication with a mobile phone, the （99） acts as a small centre to route calls to the required base station, and it also makes some decisions about which of the base station is best suited to a particular call.（100） can be used to link the BSC with related BTS。A. BSC B. BTS C. MSC D. VLR A. BSC B. BTS C. MSC D. HLR A. Land lines B. Microwave links C. Microwave dish antenna D. Land lines or microwave links
● （75） means the conducting of business communication and transaction over network and through computers.（75）A. E-Mail B. E-Government C. E-text D. E-Commerce
Irish broadcasting began in ______ in a small studio called Dublin Broadcasting Station. A.1906B.1916C.1926D.1936
The data station usually means a(71)unit that provides data for transmission, that accepts transmitted data, and that performs all functions necessary for communication with another functional unit. Data stations may be divided into two kinds, the primary stations and the secondary stations, (72)control functions.In(73)data link control, the primary station is the data station that supports the primary control functions of the data link, generates commands to be transmitted, and interprets received responses. Specific responsibilities assigned to the primary station include initialization of control signal interchange, organization of data flow and actions regarding error control and error recovery functions. The secondary station executes data link control functions as (74)by the primary station, interprets received commands and (75) responses to be transmitted.A．performanceB．functionalC．capacityD．quality
In data communication, data link is those parts of two data terminal equipments that are controlled by a protocol along with the(71) data circuit, which together enable data(72). So-called protocol means, in short, a set of rules that determines the behavior. of functional units in achieving communication.Data circuit, however, consists of a pair of(73) transmission channels that provides a means of two-way data transmission. Between data switching exchanges, the data circuit may or may not include data circuit-terminating equipment (DCE), depending on the type of(74) used at the data switching exchange. Between a data station and a data switching exchange or data concentrator, the data circuit includes the DCE at the data station end, and may include equipment(75) to a DCE at the data switching exchange or dam concentrator location.A．handshakingB．interconnectingC．linkageD．joining
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.wareB.signalC.bandwidthD.domain
（75） ● means the conducting of business communication and transaction over network and through computers.（75）A. E-MailB. E-GovernmentC. E-textD. E-Commerce
The line connecting the Loran-C master station with a secondary station is called the ______．A.Focus lineB.Base lineC.Side lineD.Center line
work performance information is circulated through（）processes.A.planningB.changeC.improvementD.communication
CDMA for cellular systems can be described as follows.As with FDMA，each cell is allocated a frequency（ ），which is split into two parts,half for reverse（mobile unit to base station）and half for（ ）（base station to mobile unit）.For full-duplex（本题）.a mobile unit uses both reverse and forwardchannels.Transmission is in the form of direct-sequence spread（ ）,which uses a chipping code to increase the data rate of the transmission,resulting inan increased signal bandwidth.Multiple access is provided by assigning（ ）chipping codes to multiple users,so that the receiver can recover the transmission of an individual unit from multiple transmissions.A.connectionB.transmissionC.compromiseD.communication
单选题A radio link between a transmitting earth station and a receiving earth station through one satellite is named a（）.ARadio linkBSpace segmentCSatellite linkDupper link
单选题Barely able to speak because of the cold, the communication among the two explorers had to be done through gestures.Athe communication among the two explorers had to be done through gesturesBthe communication between the two explorers had to be done through gesturesCthe two explorers had to communicate through gesturesDthe two explorers had to communicate between themselves from gesturesEgestures were used to communicate between the two explorers
单选题A mobile earth station in the maritime mobile-satellite service,which is located on board ship,is called（）.Aan LESBan SESCa ship stationDa Land Mobile Station
单选题The line connecting the Loran-C master station with a secondary station is called the（）.AFocus lineBBase lineCSide lineDCenter line
单选题A ship station on receiving a shore-to-ship distress alert should（）.Akeep silenceBinterfere with such communicationCestablish communication as directed and render such assistance as is required and appropriateDrefuse communication as directed and render such assistance as it required and appropriate
单选题If I _____ you, I wound go now and wait for them at the station.AamBwasCwereDhave been