Frame. Relay is simplified form. of (71) ，similar in principle to (72) ，in which synchronous，frames of data are routed to different destinations depending on header information．

Packets are routed throught one or more Virtual Circuits known as (73) .Most Virtual Circuits are (74) ，which means that the network provider sets up all DLCI connections at subscription time． (75) are also part of the Frame. Relay specification．They privide a link that only lasts only as long as the session．(71)

A．Datagram Switching

B．Datagram Routing

C．Packet Switching

D．packet Routing(72)

A．X．21

B．X．25

C．X．28

D．X．29(73)

A．DLCIs

B．HDLCs

C．SDLCs

D．DLs(74)

A．Permanent Circuits

B．Permanent Virtual Circuits

C．Switched Virtual Circuits

D．Switching Circuits(75)

A．Permanent Circuits

B．Permanent Virtual Circuits

C．Switched Virtual Circuits

D．Switched Circuits

[单选题]Frame. Relay is simplified form. of (71) ,similar in principle to (72) , in which synchronous, frames of data are routed to different destinations depending on header information ．Packets are routed throught one or more Virtual Circuits known as (73)

[单选题]F．rame. Relay is simplified form. of(71), similar in principle to(72), in which synchronous, frames of data are routed to different destinations depending on header information.Packets are routed throught one or more Virtual Circuits known as(73)Most

[单选题]F．rame. Relay is simplified form. of(71), similar in principle to(72), in which synchronous, frames of data are routed to different destinations depending on header information . Packets are routed throught one or more Virtual Circuits known as(73).

[单选题]F．rame. Relay is simplified form. of(66), similar in principle to(67), in which synchronous, frames of data are routed to different destinations depending on header information.Packets are routed throught one or more Virtual Circuits known as(68). Mo

[单选题]F．rame. Relay is simplified form. of(51), similar in principle to(52), in which synchronous, frames of data are routed to different destinations depending on header information.Packets are routed throught one or more Virtual Circuits known as(53). Mo

[单选题]帧中继(Frame. Relay)交换是以帧为单位进行交换，它是在________上进行的。A．物理层B．数据链路层C．网络层D．运输层

[单选题]帧中继(Frame. Relay)交换是以帧为单位进行交换，它是在 ______ 上进行的。A．物理层B．数据链路层C．网络层D．运输层

[单选题]F．orm. Object表示( )。A．单选按钮B．表单对象C．复选框D．跳转菜单

[单选题]在配置命令frame-relay map ip 192.168.1.1 dlci 101 broadcast中，数字101的含义是(50)。A．本端逻辑通道编号B．本端数据链路编号C．对端物理接口编号D．对端链路节点编号

[判断题] Frame Relay是从ATM协议演变来的。（）A . 正确B . 错误