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Data transmission

Data transmission. Error correction. Stop and wait error ARQ Continuous ARQ (Automatic Repeat reQuest). Protocols (p. 147). Asynchronous transmission FTPs Xmodem, ymodem, zmodem and kermit Synchronous Protocols SDLC, HDLC, Token ring Ethernet SLIP, PPP. Asynchronous transmission.

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Data transmission

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  1. Data transmission

  2. Error correction • Stop and wait error ARQ • Continuous ARQ • (Automatic Repeat reQuest)

  3. Protocols (p. 147) • Asynchronous transmission • FTPs • Xmodem, ymodem, zmodem and kermit • Synchronous Protocols • SDLC, HDLC, Token ring • Ethernet • SLIP, PPP

  4. Asynchronous transmission • One byte per time • Parity • Full duplex • Continuous ARQ

  5. FTPs (p. 149) • STX (ASCII: start of text) • Packet # • Packet # complimet • Message • Checksum or CRC

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