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User:Chotchki/BusDataComm

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"cotrocdron":http://pascletoz.com/roldar.html

Contents

[edit] Thursday 12 January 2006

  • Why study data communications?
  • 802.16 - WiMax
  • IS and Business: Wal-Mart vs. Macy's
  • Went over a brief history of communications
    • Batch Processing
    • ARPANET
    • AOL
  • Datacomm Basics
    • Components
      • Protocol
      • Sender
      • Medium - the link between sender and receiver
      • Receiver
      • Message
  • router and routing
  • GET requests
  • Network Types
    • LAN
    • MAN - Metropolitan Area Networks
    • WAN
  • Intranets and Extranets
  • multi-layer network models

[edit] Tuesday 17 January 2006

Had a sub today

[edit] Layers of programming

He mentioned the OSI in his discussion of the network layer model.

  • Application Layer
  • Presentation
  • Session
  • Transport
  • Network
  • Data Link
  • Physical

Utterly useless, TCP/IP is really used

  • Application Layer
  • Transport
  • Network
  • Hardware

[edit] Tuesday 07 February 2006

TCP knowledge

  • datagrams
  • ports
    • went over common port assignments
  • error correction
  • window

[edit] Network Layer

  • Internet Protocol

[edit] Thursday 09 February

Went over ICANN

binary -> decimal conversion

whois usage

Class A,B,C Networks

Class D is for multicast and Class E is reserved for future use.

Also the current classless scheme ie. 192.168.0.0/16

ipv4/6 NAT

routing

[edit] Tuesday 14 February 2006

talked about routing concerns

interior/exterior routing protocol

subnetting

netmasking User:Chotchki/BusDataComm/Assignment1

[edit] Test Review

OSI Model

4 Different kinds of applications

  • web server

IETF - IEEE

application architecture

socket/port

[edit] Test/Quiz Results

99 for the Test

16.5 for the Quiz

[edit] Tuesday 28 February 2006

LAN Hardware Layers(Ethernet)

  • The wire link from the computer to the router

Ethernet is used by 95% of today's LAN

[edit] Thursday 09 March 2006

Router and Switches

Medium Access Control and Carrier Sense Multiple Access w/ Collision Detect

Cyclic Redundancy Check - error checking and correcting

  1. Take your data
  2. Setup a division problem with the number 7
  3. add 3 zeros to the end of the data
  4. divide and the remander is the crc

To check the crc

  1. take your data
  2. Setup a division problem with the number 7
  3. add the 3 digit crc to the end of the data
  4. divide and if the answer is 0.... the data is most probably error free

Typical computer uses CRC32

[edit] Tuesday 21 March 2006

[edit] Thursday 04 April 2006

FIOS, DSL

Wireless 802.11 convience at the cost of security

  • a
  • b
  • g

unregulated spectrum - 900mhz, 2.4ghz, 5.3ghz, 24ghz

collision detection vs. collision avoidance

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