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The data station usually means a（71)unit that provides data for transmission, that accepts

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．performance

B．functional

C．capacity

D．quality

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更多“The data station usually means…”相关的问题

第1题

In data communication, data link is those parts of two data terminal equipments that are c

ontrolled 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．handshaking

B．interconnecting

C．linkage

D．joining

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第2题

多载频CDMA系统中，换频切换的方式可能是（)。

A.Pilot beacon assisted handoff

B.Data base assisted handoff

C.Mobile Station assisted handoff

D.Roun

E.trip-delay assisted handoff

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第3题

Which of the following descriptions in WRONG about the uses of Wi-Fi().

A.The hardware provides indication to the sender about whether the transmission was delivered

B.All stations share a single radio frequency communication channel.

C.Each station is constantly tuned in on the channel.

D.A carrier wave is used to transmit the data in packets.

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第4题

Both bus and tree topologies are characterized by the use of multipoint（71)．For the bus，al

Both bus and tree topologies are characterized by the use of multipoint (71) ．For the bus，all stations attach，through appropriate hardware (72) known as a tap，directly to a linear transmission medium，or bus．Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the (73) ．A transmission from any station propagates the length of the medium in both directions and can be received by all other (74) ．At each end of the bus is a (75) ，which absorbs any signal，removing it from the bus．

（71）

A．medium

B．connection

C．token

D．resource

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第5题

A transport layer protocol has several responsibilities. One is to create a process-to-pro

cess (program-to-program) communication; TCP uses port (71) to accomplish this. Another responsibility of a transport layer protocol is to create a (72) and error-control mechanism at the transport level. TCP uses a sliding (73) protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve (74) control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends (75) of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.

（71）

A．numbers

B．connections

C．diagrams

D．resources

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第6题

● A transport layer protocol has several responsibilities. One is to create a process-to-p

rocess (program-to-program) communication; TCP uses port （71） to accomplish this. Another responsibility of a transport layer protocol is to create a （72） and error-control mechanism at the transport level. TCP uses a sliding （73） protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve （74） control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends （75） of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.

（71）

A. numbers

B. connections

C. diagrams

D. resources

（72）

A. procedure

B. function

C. route

D. flow

（73）

A. path

B. window

C. frame

D. diagram

（74）

A. packet

B. time

C. error

D. phase

（75）

A. ports

B. streams

C. packets

D. cells

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第7题

A．They are accurate and easy to pull.B．Their shooting range is 40 yards.C．They are usu

A．They are accurate and easy to pull.

B．Their shooting range is 40 yards.

C．They are usually used indoors.

D．They took 100 years to develop.

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第8题

公共汽车站（汉译英）（）

A.us station

B.subway station

C.train station

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第9题

station一词中tion读[sjɔ̃]音。（）

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第10题

Initiation of the paging process for a mobile station is done by （）.

A.MSC over a location area

B.all Base Transceiver Stations in a location area

C.a Base Station Controller over one BSC area

D.a Base Transceiver Station in one cell

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