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CISCO

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TCP/IP - the computers address on the network. Networks - a 'conglomeration' of people or things focused on a common goal. LAN ... – PowerPoint PPT presentation

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Title: CISCO


1
CISCO
2
Computer Networking
3
The Internet
4
The Internet Yesterday
5
Basics of Computing
6
Parts of a Computer
  • CPU - Central Processing Unit
  • Memory - ROM, RAM, etc.
  • Interface - Modem, Video Card, Floppy, etc.
  • All are connected by a bus which is plug in
    slots.

7
NIC
  • Network Interface Card
  • PCs use IDE or PCI
  • Laptops use PCMCIA (credit card)
  • TCP/IP - the computers address on the network

8
Networks - a conglomeration of people or
things focused on a common goal
  • LAN
  • Local Area Network
  • used within or between offices
  • WAN
  • Wide Area Network
  • used between buildings or within a complex

9
How is information stored in computers?
  • By using the binary number system
  • The only possible symbols or "bits", are 1 and 0.
  • The bits represent text, pictures, and sounds
  • A 1 bit is often represented by the presence of
    voltage on a copper conducting cable or light in
    an optical fiber

10
  • Imagine measuring the voltage at one point on the
    cable as time goes on (for a fiber, imagine
    measuring the light intensity versus time).
  • Your measurements would allow you to create a
    graph of voltage versus time (for a fiber, light
    intensity versus time).

11
The numbering system most frequently used is the
decimal numbering system.
A decimal numbering system is based on powers
of 10 100, 101, 102, 103, 104, etc. 100
1 101 10 X 1 or 10 102 10 X 10 or 100 103
10 X 10 X 10, or 1000 104 ?????????
12
When counting in the decimal system when you
reach the number 9 you must add another digit.
Examples
Count 9, 10 Count 99, 100 Count 999, 1000
13
Binary numbering system (Bit - binary digit)
How does a binary number system differ from a
decimal numbering system?
A binary numbering system is based on powers of
2 20, 21, 22, 23, 24, etc. 20 1 21 2 X 1 or
2 22 2 X 2 or 4 23 2 X 2 X 2, or 8 24
?????????
14
Lets count in binary. Remember you can only use
0s and 1s.
0 1 10 11 100 101 110 111
15
Lets take a break and complete a worksheet on
converting decimal to binary and vice versa.
Bonus What would an octet of all ones equal?
16
American Standard Computer Information Interchange
17
Bandwidth
  • Water
  • Hiway System
  • Radio
  • Audio
  • Media
  • Coaxial Cable
  • Category 5 Cable (Cat 5)
  • Fiber Optic
  • Bandwidth determines throughput (because file are
    transferred faster)
  • slow or fast
  • 14.4K or 56K
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