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Principles of Computer Architecture Miles Murdocca and Vincent Heuring Chapter 9: Communication. Chapter Contents. 9.1 Modems 9.2 Transmission Media 9.3 Network Architecture: Local Area Networks 9.4 Communication Errors and Error Correcting Codes 9.5 Network Architecture: The Internet

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principles of computer architecture miles murdocca and vincent heuring chapter 9 communication
Principles of Computer ArchitectureMiles Murdocca and Vincent HeuringChapter 9: Communication
chapter contents
Chapter Contents
  • 9.1 Modems
  • 9.2 Transmission Media
  • 9.3 Network Architecture: Local Area Networks
  • 9.4 Communication Errors and Error Correcting Codes
  • 9.5 Network Architecture: The Internet
  • 9.6 Case Study: Asynchronous Transfer Mode
modem communication
Modem Communication
  • • Communication over a telephone line with modems:
modulation schemes
Modulation Schemes
  • • Three common forms of modulation:
pulse code modulation
Pulse Code Modulation
  • • Conversion of an analog signal into a PCM binary sequence:
transmission media
Transmission Media
  • • Transmisson media. (a) Two-wire open lines; (b) twisted-pair lines; (c) coaxial cable; (d) optical fiber; (e)satellites.
a few network topologies
A Few Network Topologies
  • • (a) Bus; (b) ring; and (c) star network topologies.
parity
Parity
  • • Even parity bits are assigned to a few ASCII characters:
check bits
Check Bits
  • • Check bits for a single error correcting ASCII code:
sec coded a
SEC coded ‘a’
  • • Format for a single error correcting ASCII code:
sec coded d
SEC Coded ‘d’
  • • Parity computation for an ASCII character in an SEC code:
3 bit sec hypercube
3-Bit SEC Hypercube
  • • Hamming distance relationships among three-bit codewords. Valid codewords are 000 and 111. The remaining codewords represent errors.
lrc and vrc checking
LRC and VRC Checking
  • • Combined LRC and VRC checking. Checksum bits form even parity for each column.
internet protocol stack
Internet Protocol Stack
  • • Layering in the TCP/IP protocol suite:
encapsulation
Encapsulation
  • • Encapsulation in the TCP/IP protocol suite:
hub vs router vs switch
Hub vs. Router vs. Switch
  • • Configurations shown for (a) a hub; (b) a router; and (c) a switch.
self routing switch
Self-Routing Switch
  • • A 4´4 self-routing switch based on the bubblesort algorithm:
tdm vs atm
TDM vs. ATM
  • • (a) Time division multiplexing vs. (b) asynchronous transfer mode.
format of an atm packet
Format of an ATM Packet
  • • Format of an ATM packet. (a) User-to-network interface (UNI) format; and (b) network-to-network interface (NNI) format.