ccna 1 v3.0 module 1 introduction to networking
DESCRIPTION
CCNA 1 v3.0 Module 1 Introduction to Networking. Objectives. Requirements for Internet Connection. PC Basics. PC Basics. PC Basics. PCI Expansion Slots. AGP Expansion Slot. PC Basics. Network Interface Cards. NIC and Modem Installation. High-Speed and Dialup Connectivity. - PowerPoint PPT PresentationTRANSCRIPT
CCNA 1 v3.0 Module 1 Introduction to Networking
Objectives
Requirements for Internet Connection
PC Basics
PC Basics
PC Basics
PC Basics
AGP Expansion Slot
PCI Expansion Slots
Network Interface Cards
NIC and Modem Installation
High-Speed and Dialup Connectivity
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 finishedThe device needs more instructionsFaults are developed
IRQs
IRQs
TCP/IP Description and Configuration
Testing Connectivity with Ping
Web Browser and Plug-Ins
Troubleshooting Internet Connections
Data RepresentationCharacter coding schemesASCII, UnicodeUnicode – International 16-bit coding system which can represent 65536 different charactersBinary number systemBinary Coded Decimal (BCD)each decimal digit has its own 4-bit binary codeBoolean valuesonly True or FalseDigitised soundMIDIBit-mapped graphics
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 0101Alternatively in pure binary draw a table of powers of 2. Then find the largest power of 2<=25 (16). Subtract 16 from 25 and repeatValue 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 backwardsValue 128 64 32 16 8 4 2 1
0 1 0 0 0 1 0 1 64 + 4 + 1 = 69
Binary
Example The yable shows numbers 0 1- in 4-bit binary code.
Decimal Binary Decimal Binary
0 0000 5 0101
1 0001 6 0110
2 0010 7 0111
3 0011 8 1000
4 0100 9 1001
Boolean Values
A Boolean variable can only have one of two values, true or falseRepresented by a 1 or a 0Useful 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
Binary Number System
Bits and Bytes
Main Memory Computer Memory
250 bytes = 1 Petabyte Pb 260 bytes = 1 Exabyte Ex
270 bytes = 1 Zettabyte Zb 280 bytes = 1 Yottabye Yb
Base 10 Numbers
Base 2 (Binary) Numbers
Converting Decimal numbers to 8-bit Binary Numbers
Converting 8-bit Binary Numbers to Decimal Numbers
Four-Octet Dotted-decimal Representation of 32-Bit Binary Numbers
Hexadecimal
Boolean or Binary Logic
IP Addresses and Network Masks
Summary