OVERVIEW OF THE INTERNET

DIFFERENT TYPES OF INTERNET CONNECTION

Dial-up Connection
Conventional Dial-up	To connect to the computer,computer dials its modem,and connect to a modem attached to to a computer belonging to your ISP. PC has to dial via telephone line to connect. Exm : TMNet
ISDN (Integrated Services Digital Network)	Transfer data using ordianary telephone line & use two phone lines to transfer data. ISDN require a special ISDN modem.

Direct Connection / Broadband Internet Connection
DSL	Broadband delivered through telephone line. Transmites over telephone line but not tie up the line. Fast,direct Internet access via standard telephone line. Requires DSL modem,available in urban area. Exm : Streamyx without WiFi
Fiber To The Premise	Also known as Broadband over Fiber. Delivers over fibre optic all teh way over building.(Available in limited area & fast but expensive ) Use fibre optic,provide high speed Internet access to house and business user. Exm : YES,P1
Fixed Wireless	Uses radion transmission towers rather than satellite. Not available in all areas,expected to use WiMAX. Provides high speed Internet connections using a dish shaped antenna to communicate via radio signals. Exm : YES,P1
Cellular Radio Network	Also known as Mobile wireless,access via mobile phone or devices. Offers high speed Internet connections to devices with built in compatible technology or computers with wireless modems. Exm : Celcom,Maxis,DiGi
Cable Internet Service	Most widely used home broadcast connection. Provides high speed Internet access through the cable television network via cable modem. Exm : Telekom
Wi-Fi (Wireless Fidelity)	Data transmitted through radio waves. Provides high speed Internet connection to compatible or properly equipped wireless computers and devices. Exm : Streamyx with WiFi
Satellite Internet Service	Broadband option for rural area. More expensive than cable or DSL & available in many areas other broadband options are not. Provides high speed Internet connection via satellite. A satellite dish communicates with a satellite modem. Exm : Telekom

INTERNET SERVICE PROVIDER

Internet Service Provider :

A company that provides Internet connections and services to individuals and organizations.

Access Provider : 

A business that provides individuals and organizations access to the Internet for free or for a fee.

PICTURE 1 : ISP IN MALAYSIA

PICTURE 2 ; ISP IN MALAYSIA

THE INTERNET ADDRESS

IP Address ;

• A number that uniquely identifies eac computer or device connected to the Internet.
• IP address are also referred to as IP numbers and Internet addresses.
• IP addresses sometimes is called a dotted decimal number or dotted quad.

IP Usage ;

• A way to find specific server or computer on the Internet or a network.
• Provide identity to a computer in a network.
• Identify for a particular device/machine on a particular network.
• Allows transfers or files and e-mail.

IP Structure :

• IP addresses usually consists of four groups of number each separated by a period.
• The number in each group is between 0 and 225.
• It is 32 bit long,each group is 8 bits long.
• Commonlu written in decimal.
• Written for exm : 128.35.0.72
• The four sections represent the machine itself and the network it is on.
• The network portion is assigned.The hosdt section is determined by the network administrator.

5 classes of IP address A,B,C,D and E :

• Class A : reserved for governments/large companies.
• Class B : reserved for medium companies
• Class C ; reserved for small companies
• Class D : reserved for multicasting
• Class E : reserved for future use

Domain names and IP address:

• Domain names are alphanumeric names for IP addresses.
• The domain name system (DSN) is an Internet -wide distributed database that translates between domain names and IP address.