01 LCD Slide Handout 1
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Transcript of 01 LCD Slide Handout 1
Introduction to Computer Networking
Computer Networking and Data Communication
Rationale: Why Network Computers Using a PC on a Network Network Math
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Computer Networking and Data Communication
Internet
It refers to global computernetwork that linksinformation and people
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Computer Networking and Data Communication
Network
It refers to a system consisting of computers and devices connectedtogether via communications devices and media that allow users toelectronic communications, share resources or exchange files
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Computer Networking and Data Communication
Data Communications
It refers to the process oftransferring of digitalinformation from computersand components of computersystems via wired or wirelesstransmission medium whichinclude:
For Electricity For Light For Electromagnetic
Radiation
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Computer Networking and Data Communication
Telecommunications
It refers to any process that permits exchange of information overgreat distances, in the form of electromagnetic signals, throughelectromagnetic system
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Rationale: Why Network Computers
Advantages of Computer Network
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Rationale: Why Network Computers
Requirements for Internet connection
Physical Connection
Logical connection
Application that interpret the data and display the information
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Rationale: Why Network Computers
“Ping” command utility
Types of ping tests
ping 127.0.0.1
ping IP address of host computer
ping default-gateway IP address
ping remote destination IP address
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Rationale: Why Network Computers
“Ping” command utility
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Using a PC on a Network
PC Components
Motherboard
Central Processing Unit (CPU)
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Using a PC on a Network
PC Components Bus Random Access Memory
(RAM)
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Using a PC on a Network
PC Components
Read Only Memory (ROM)
Power supply
Hard Disk Drive
Operating system
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Using a PC on a Network
PC Components External Ports
Serial Port
Video port
Ethernet port
Universal Serial Bus (USB) Port
PS/2 port
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Using a PC on a Network
PC Components
Compact disc read – only memory (CD-ROM) Drive
Compact disc read – write memory (CD-RW) drive
Floppy Disk Drive
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Using a PC on a Network
An Idealized Computer: Information Flow
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Using a PC on a Network
Information that flows in an Idealized Computer
Boot instructions
Software applications
RAM and ROM
Application information
Saved information
Exported information
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Using a PC on a Network
Network Interface Card
It is an expansion board thatprovides networkcommunication capabilitiesto and from a computersystem
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Using a PC on a Network
Network Interface Card
It is plug into a motherboardor PCMCIA slot
It communicates to thenetwork via serial connectionwhile it communicates to thePC via a parallel connection,I/O address and IRQ
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Using a PC on a Network
Factors to be considered in choosing the NIC
Bus type
Network topology
Medium type
Transport speed
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Using a PC on a Network
Types of network administration software
Network Operating System (NOS)
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Using a PC on a Network
Types of network administration software
Network Operating System (NOS)
Peer – to – peer networking operating system
Cient/server networking operating system
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Using a PC on a Network
Types of network administration software
NOS Remote Services
Access to remote printers
Access to files on remote systems
Access to remote applications and resources
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Using a PC on a Network
Types of network administration software
NOS Remote Services
Routing services (including support for major networking protocols)
System and security monitoring
Basic network administration utilities
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Using a PC on a Network
Types of network administration software
Network monitoring software
Protocol analyzers
Sniffing software (a.k.a. packet sniffers)
Network management software
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Network Math
Decimal Number System
It is the number system that we are all familiar with
It is used by our forefathers basically for the simple reason that theystarted to learn to count with their ten fingers
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Network Math
Binary Number System
It is the number system thatis the basic foundation of anycomputer machine
A computer circuit representsthe 0 or the 1 electronicallyby the presence or absence ofan electrical charge
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Network Math
ASCII (American StandardCode for InformationInterchange)
It displays the binary numberrepresentation of manykeyboard and controlcharacters.
It is one of several character-encoding systems used inLANs.
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Network Math
Practice Exercises
Convert the following decimal numbers into binary
216
119
41
255
188
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Network Math
Practice Exercises
Convert the following binary numbers into decimal
01101011
10010110
11101001
00011011
01111111
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