1. CCNA 1 v3.0 Module 1 Introduction to Networking

2. Objectives

3. Requirements for Internet Connection

4. PC Basics

7. AGP Expansion Slot PCI Expansion Slots

8. Network Interface Cards

9. NIC and Modem Installation

10. High-Speed and Dialup Connectivity

11. IRQ, I/O port channels and Base Memory Addresses. IRQ is an acronym for Interrupt ReQuest. An IRQ is a piece of circuitry built into the motherboard that connects one device/part to the CPU (Central Processing Unit). It lets the device interrupt the CPU so that jobs can be allocated and problems dealt with. Devices connect to CPU when: A task is finished The device needs more instructions Faults are developed

12. IRQs

14. TCP/IP Description and Configuration

15. Testing Connectivity with Ping

16. Web Browser and Plug-Ins

17. Troubleshooting Internet Connections

18. Data Representation Character coding schemes ASCII, Unicode Unicode – International 16-bit coding system which can represent 65536 different characters Binary number system Binary Coded Decimal (BCD) each decimal digit has its own 4-bit binary code Boolean values only True or False Digitised sound MIDI Bit-mapped graphics

19. Binary number system Numbers can be represented in a computer in a number of different ways, e.g. 25 in ASCII would be: 0011 0010 0011 0101 Alternatively in pure binary draw a table of powers of 2. Then find the largest power of 2<=25 (16). Subtract 16 from 25 and repeat Value 128 64 32 16 8 4 2 1 0 0 0 1 1 0 0 1 16 + 8 + 1 = 25 To translate from binary to decimal perform same process backwards Value 128 64 32 16 8 4 2 1 0 1 0 0 0 1 0 1 64 + 4 + 1 = 69

20. Binary Example The yable shows numbers 0 1- in 4-bit binary code. DecimalBinaryDecimalBinary 0000050101 1000160110 2001070111 3001181000 4010091001

21. Boolean Values A Boolean variable can only have one of two values, true or false Represented by a 1 or a 0 Useful to be able to use a binary bit to show if something is true or false, e.g: To show whether a disk drive is connected To show if the ‘break’ key is pressed’ Single bits used in this way are called Flags

22. Binary Number System

23. Bits and Bytes

24. Main Memory Computer Memory 2 50 bytes = 1 Petabyte Pb 2 60 bytes = 1 Exabyte Ex 2 70 bytes = 1 Zettabyte Zb 2 80 bytes = 1 Yottabye Yb

25. Base 10 Numbers

26. Base 2 (Binary) Numbers

27. Converting Decimal numbers to 8-bit Binary Numbers

28. Converting 8-bit Binary Numbers to Decimal Numbers

29. Four-Octet Dotted-decimal Representation of 32-Bit Binary Numbers

30. Hexadecimal

31. Boolean or Binary Logic

32. IP Addresses and Network Masks

33. Summary