the internet

the internet

1. point of presence (PoP)

   • an access point to the internet that normaly is located in an area tat contains all hardware that is needed to allow internet users to access the internet.

2. transmission controle protocal (TCP)

   • the protocol which takes data from a user's aplication program and passes it to ip for transferacross the internet. the reverse operation is performed at the destination computer, i.e. the TCP reassembles the data (from individual packets) and forwards them to the user’s application program. The close relation with the IP means that the terms are usually used in combination, i.e. TCP/IP.

3. isp pervices

   • In addition to providing a gateway to the internet, ISPs normally provide additional services such as email. Many also provide web space for the development of websites, technical support and troubleshooting.

4. internet service provider (ISP)

   • Direct connection to the internet would be very costly and so ISPs provide a cost-effective gateway for people and organisations to get onto the internet. In the UK there are many ISPs, with some of the most popular ones being BT (British Telecom), Virgin Media and Sky.

5. network access point (NAP)

   • allows ISPs to interconnect with eachother

6. internet protocol (IP)

   • a unit of data is sent across a network, including the internet. It is made up of a header which identifi es the packet and a body which is the actual data message. It is one of the functions of the Transmission Control Protocol (TCP) to organise an internet message packet

7. File Transfer protocol (FTP)

   • A standard protocol which allows fi les to be transferred between two computers on a TCP-based network. It is commonly used to download programs to your computer from other servers and to upload web pages that you have created to the server that is hosting them on the internet.