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Transmission error传输差错
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调度请求用于请求新传输的『____』资源。(Scheduling request is used to request 『____』resource for new transmission.)
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对于ICMP协议,以下描述正确的是( )
A、ICMP只能用于传输差错报文。B、ICMP只能用于传输控制报文。C、ICMP既不能传输差错报文，也不能传输控制报文。D、ICMP不仅用于传输差错报文，而且用于传输控制报文。
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On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously,resulting in a collision. Following this collision, what will the hosts do?（）A、The destination host sends a request to the source for retransmission.B、The jam signal indicates that the collision has been cleared.C、The hosts will attempt to resume transmission after a time delay has expired.D、An electrical pulse indicates that the collision has cleared.E、The router on the segment will signal that the collision has cleared.F、The hosts will do nothing, as the higher layers are responsible for data error correction and re-transmission.
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传输协议HTTP是（）的缩写。A、Hit That ProfessionB、Happy Text Thanks PensilC、High Ten PackageD、Hyper Text Transmission Protocol
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接入网的功能结构是以ITU-T建议G.803的分层模型为基础的，以下哪项不属于G.803的分层模型（）。A、电路层（CircuitLayer，CL）B、路控制子层（LogicalLink Control，LLC.C、传输通道层（Transmission Path layer，TP）D、传输介质层（Transmission Media layer，TM）
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TD-LTE路测中，从路测系统软件中看见的Transmission Mode下列表述错误的是（）。A、天线传输模式；B、上下行有不同天线传输模式；C、不统天线传输模式与速率有较大影响；D、证实或非证实传输模式。
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TCP/IP协议中的传输层协议主要完成（）A、在端与端之间提供无差错、可靠的、透明的数据传输B、在点与点之间提供无差错、可靠的、透明的数据传输C、提供端到端的差错恢复和流量控制D、提供点到点的差错恢复和流量控制
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单选题If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens? （）A
The transmission is aborted and an alarm sounds to indicate this data must be provided by the operatorB
The transmission is not initiated and ERROR is indicated on the display readoutC
The transmission will be made with default information provided automaticallyD
The receiving station will poll the DSC unit of the vessel in distress to download the necessary information
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多选题Which three statements describe the User Datagram Protocol (UDP)?（）AUDP provides delivery notification and error checking mechanisms.BUDP is faster than the Transmission Control Protocol (TCP).CUDP application examples include DNS and VoIP.DUDP is an application layer protocol.EUDP uses a best effort delivery approach.
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