In the name of Allah, the merciful the most beneficent
Mansoor Shaheed Khawar
What Is Internet?
The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide.
It is a network of networks that consists of millions of private and public, academic, business, and government networks of local to global scope that are linked by a broad array of electronic and optical networking technologies.
The terms Internet and World Wide Web are often used in everyday speech without much distinction.
The Internet is a global data communications system
It is a hardware and software infrastructure that provides connectivity between computers
Web is one of the services communicated via the Internet .
It is a collection of interconnected documents and other resources , linked by hyperlinks and URLs .
The USSR 's launch of Sputnik spurred the United States to create the Advanced Research Projects Agency, known as ARPA, in February 1958 to regain a technological lead. ARPA created the Information Processing Technology Office (IPTO) to further the research of the Semi Automatic Ground Environment (SAGE) program, which had networked country-wide radar systems together for the first time. J. C. R. Licklider was selected to head the IPTO .
The opening of the network to commercial interests began in 1988 .
Other commercial electronic e-mail services were soon connected, including OnTyme, Telemail and Compuserve. In that same year, three commercial Internet service providers (ISPs) were created.
The complex communications infrastructure of the Internet consists of its hardware components and a system of software layers that control various aspects of the architecture.
the hardware can often be used to support other software systems
it is the design and the rigorous standardization process of the software architecture that characterizes the Internet and provides the foundation for its scalability and success.
The Internet structure and its usage characteristics have been studied extensively
Internet IP routing structure and hypertext links of the World Wide Web are examples of scale-free networks .
Governance ICANN headquarters in Marina Del Rey , California , United States
What Is Governance?
The Internet is a globally distributed network comprising many voluntarily interconnected autonomous networks.
It operates without a central governing body.
ICANN is the authority that coordinates the assignment of unique identifiers for use on the Internet,
The Internet is allowing greater flexibility in working hours and location, especially with the spread of unmetered high-speed connections and web applications
The Internet can now be accessed almost anywhere by numerous means, especially through mobile Internet devices .
The Internet has also become a large market for companies.
INTERNET SESVICE PROVIDER
What Is ISP ?
An Internet service provider ( ISP ),
is a company that offers its customers access to the Internet .
ISP connects to its customers using a data transmission technology appropriate for delivering Internet Protocol datagrams , such as dial-up , DSL , cable modem , wireless or dedicated high-speed interconnects.
ISPs employ a range of technologies to enable consumers to connect to their network.
For users and small businesses , the most popular options include dial-up , DSL (typically Asymmetric Digital Subscriber Line ,
For customers with more demanding requirements, such as medium-to-large businesses, or other ISPs, DSL (often SHDSL or ADSL ), Ethernet , Metro Ethernet , Gigabit Ethernet , Frame Relay , ISDN ( BRI or PRI ), ATM , satellite Internet access and synchronous optical networking (SONET) are more likely to be used.
Typical home user connection
Broadband wireless access
Typical business-type connection
Function of ISP
When using a dial-up or ISDN connection method, the ISP cannot determine the caller's physical location
Broadband Internet access
Fixed wireless access
Internet hosting service
Web hosting service
E-mail hosting service
DNS hosting service
Internet Service Provider List of Pakistan
There are 38 Internet Service Providers in Pakistan.