SDLC was invented by IBM to replace the older Bisynchronous protocol for wide area connections be...

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a primary station one or more primary stations a secondary station one or more secondary stations

half duplex full duplex half or full duplex half and full duplex

Waterfall ExtremeProgramming Spiral RapidPrototyping

a peer to peer a point-to-point not a peer to peer a peer to peers

HDLC Frame Relay X.25 X.21

HDSL HDLC SDLC ADSL

a primary station one or more primary stations a secondary station one or more secondary stations

halfduplex full duplex half or full duplex half and full duplex

a peer to peer a point-to-point not a peer to peer a peer to peers

a primary station one or more primary stations a secondary station one or more secondary stations

SDLC HDLC Cisco ANSI

Waterfall Extreme Programming Spiral Rapid Frototyping

Waterfall Extreme Programming Spiral Rapid Prototyping

LARF HDLC LAPB SDLC

half duplex full duplex half or full duplex half and full duplex

HDLC Frame Relay X.25 X.21

a primary station one or more primary stations a secondary station one or more secondary stations

HDLC Frame Relay X.25 X.21

a peer to peer a point-to-point not a peer to peer a peer to peers