TOPIC 3

DATA TRANSMISSION AND NETWORKING

MEDIA

INTERNET SERVICE PROVIDER (ISP)

also known as Internet Access Provider (IAP)

It is a company that offers its customers access to the Internet.

The ISP connects to its customers using a data transmission technology appropriate for delivering IP datagram.

ISPs may provide Internet e-mail accounts to users which allow them to communicate with one another by sending and receiving electronic messages through their ISP's servers.

ISPs may provide other services such as remotely storing data files on behalf of their customers.

Allow organizations & individuals to publish information on the internet.

RELATIONSHIP OF ISP & INTERNETAn ISP supplies Internet connectivity to home

and business customers.

ISPs support one or more forms of Internet access, ranging from traditional modem dial-up to cable modem broadband service.

Wireless Internet service providers or WISPs have emerged that offer Internet access through wireless LAN or wireless broadband networks.

many ISP also offer related Internet services like email, Web hosting and access to software tools.

A few companies also offer free ISP service to those who need occasional Internet connectivity but limited.

ISP COMPANY IN M’SIA

Celcom.net

iDiGi Internet Services

Jaring

Maxis Net

P1 - WiMAX, wireless broadband provider, w1max,

Green Packet, Packet One

TIME dotCom Berhad.

TMnet Streamyx

U-Mobile - Surf With U - 3G wireless broadband

provider

OPTIONS OF ISP CONNECTIONTypical home user connection

Dial-up

Digital Subscriber Line (DSL)

Broadband wireless access

Cable Internet

Fibre to the premises (FTTH)

Integrated Services Digital Network (ISDN)

Wi-Fi

Typical business type connection

Digital Subscriber Line (DSL)

SHDSL

Ethernet technologies

RELATED SERVICES OF ISP

Broadband Internet access

Fixed wireless access

Cable

Internet hosting service

Web hosting service

E-mail hosting service

DNS hosting service

ISP LEVELS OF SERVICE

Most ISPs offer two different contract levels:

- home service

- business class service

Asymmetric

Different upload and download speeds.

Used for home

Symmetric

Same upload & download speeds.

Used for business.

Various services are available

-file storage

-virus scanning

-email accounts

Goods and services. By processing and storing data, and allowing people to access and sort these data, they facilitate the flow of information that has become vital to the economy.

Recent developments. The Internet is constantly expanding and evolving, and so are the industries associated with it. Many firms in the telecommunications and broadcasting industries now provide internet services

Industry organization. ISPs develop and maintain the physical, technical, and contractual connections and agreements needed for the internet to function.

Importance of the Internet Protocol (IP)

Must run Internet Protocol (IP) software to communicate on internet.

IP protocol is one of the TCP/IP (Transmission Control Protocol/Internet Protocol) protocols.

As Ethernet uses Frames , IP uses Packets.

Each IP packet must contain a valid source and destination IP address.

The IP Packet (datagram)

- Has a header which contains the source and destination IP addresses

- IP addresses must be unique on the internet.

- Computers in homes, small businesses and other orgaizations obtain their IP configuration from their ISP

HOW ISP HANDLES PACKETS

The connection of servers and computers within

the ISP forms a LAN (Local Area Network).

A firewall is usually included for security,

which is accomplished by filtering packets

coming in and out of the ISP.

A router connects the ISP to a modem at a

regional network or larger ISP.

The majority of Internet traffics moves along

backbones, which are high-speed fibre-optic

cables.

HOW ISP HANDLES PACKETSMessages are divided into packets – size between 64

to 1500 bytes for Ethernet.

Downloading a single 1 MB song would require over

600 packets or 1500 bytes.

Each individual packet must have a source and

destination IP address.

Packets or datagram contain IP address and control

information.