During network congestion, PTN devices provide QoS bandwidth for high advanced servic

●Flow control is a function that prevents network congestion by ensuring that (71) do not overwhelm (72) with datA．There are three commonly used methods for handling network congestion ． (73) is used by network devices to temporarily store bursts of excess data in memory until they can be processed． (74) are used by receiving devices to help prevent their buffers from overflowing ． (75) is a flow-control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted．

(71)~(72)A．transmitting devices

B．transmitted devices

C．receiving devices

D．received devices

(73)~(75) A．Buffer

B．Source-quench messages

C．Buffering

D．Windowing

els，()and()。hey represent two distinct QoS control techniques. One is to reserve resources to avoid congestion while the other to differentiate services during congestion. Ethernet always adopts the latter.

Flow control is a function that prevents network congestion by ensuring that(71)do not overwhelm(72)with data. There are three commonly used methods for handling network congestion.(73)is used by network devices to temporarily store bursts of excess data in memory until they can be processed. (74)are used by receiving devices to help prevent their buffers from overflowing.(75)is a flow -control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted.

A．transmitting devices

B．transmitted devices

C．receiving devices

D．received devices

Flow control is a function that prevents network congestion by ensuring that(66)do not over-whelm(67)with data. There are three commonly used methods for handling network congestion.(68)is used by network devices to temporarily store bursts of excess data in memory until they can be processed.(69)are used by receiving devices to help prevent their buffers from overflowing.(70)is a flow-control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted.

A．transmitting devices

B．transmitted devices

C．receiving devices

D．received devices

Flow control is a function that prevents network congestion by ensuring that(71)do not overwhelm(72)with data.

There are three commonly used methods for handling network congestion.(73)is used by network devices to temporarily store bursts of excess data in memory until they can be processed(74)are used by receiving devices to help prevent their buffers from overflowing.(75)is a flow-control scheme in which the source device requires an acknowledgment from the destination aider a certain number of packets have been transmitted.

A．transmitting devices

B．transmitted devices

C．receiving devices

D．received devices

A. bandwidth efficiency

B. cell-switching

C. congestion notification

D. heterogeneous network

A. provide BITS external clock input/output interface functio

B.support GPS interface function; provide 1PPS+TOD signal

C.support sync Ethernet interface function; support sync Ethernet clock source

D.support network clock sync via E1 interface; provide clock signal as required by ITU-T G.813

A．A.device protection

B．B.wrapping protection

C．C.link protection

D．D.steering protection

overwhelm_（）_ with data．There are three commonly used methods for handling network congestion．_（）_is used by network devices to temporarily store bursts of excess data in memory until they can be processed．_（）_ are used by receiving devices to help prevent their buffers from overflowing．_（）_ is a flow－control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted．

A.transmitting devices

B.transmitted devices

C.receiving devices

D.received devices@@@SXB@@@A.transmitting devices

B.transmitted devices

C.receiving devices

D.received devices@@@SXB@@@A.Buffer

B.Source－quench messages

C.window

D.Windowing

E.Buffering@@@SXB@@@A.Buffer

B.Source－quench messages

C.window

D.Windowing

E.Buffering@@@SXB@@@A.Buffer

B.Source－quench messages

C.window

D.Windowing

E.Buffering