DATA
COMMUNICATION
Lecture-40
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Asynchronous, Data Link Protocols - Data Communication - Lecture Slides, Slides of Data Communication Systems and Computer Networks
Data Link Protocols, Asynchronous Protocols, Synchronous Protocols, X modem, Character Oriented Protocols, Binary Synchronous Communication, Data Frames are points you can learn these slides.
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DATA
COMMUNICATION
Lecture-
Recap of Lecture 39
Error Control
- Stop-and-Wait ARQ
- Sliding Window ARQ
- Go-back- n
- Selective Reject
Data Link Protocols
Asynchronous Protocols
XMODEM
Synchronous Protocols
Fast transmission for LAN, MAN, and WAN
Synchronous Protocols
- Character(Byte)-oriented protocols
- Bit-oriented protocols
Synchronous Protocols
BSC (Binary Synchronous
Communication)
A popular character-oriented data link protocol
Developed by IBM in 1964
Half-duplex transmission with stop-and-wait ARQ
Usable in both point-to-point and multipoint configuration Docsity.com
BSC (Binary Synchronous
Communication)
Data Frames
BSC frame with a header
Data Frames
A Multiblock Frame
Text in a message is often divided between several blocks ⇒ To increase the likelihood of error detection
Control Frames
Control frames serve three purposes:
- Establishing connections
- Maintaining flow and error control during data transmission
- Terminating connections
Control Frames
Contain control characters but no data