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Proxy server – This is a server that all computers on the local network have to go through before accessing information on the Internet. By using a proxy server you can filter what users connected to the network can access – it is also help speed up browsing by caching site data I want to access the Internet or send an email To preview web pages and communicate safely on the net you will need the following software: Web browser to display the pages such as - Explorer, Safari, Firefox etc.. Email software to send and receive emails such as Outlook or Live mail etc.. Anti virus software to check for viruses and prevent them running or installing on your pc Modem – this decodes the binary data from the Internet so that the pc can display the page in graphical format Router – this sends the data to the correct pc by reading the IP address. There is also generally a built in Firewall to prevent unauthorised access to your machine – this is via secure password which needs to be entered on installation Mail server – this is the server which connects to the email service and then routes the mail to the correct user – like a digital postman. Mail is stored, accessed and sent through this server – virus checks can be done at this point before reaching the recipient TCP/IP when a request is sent out to the Internet – the TCP/IP protocol breaks down and packets this request into smaller chunks. This protocol will assign an IP address to the request and also direct it to the correct IP address of the server which holds the information. ISP – this is a company/service that controls your internet access – this will include the speed of the service and the infrastructure to enable the communications. Eg: Talktalk, BT, Plusnet etc.. They may also act as a mail server for your emails. When a link is clicked or a web address typed into a browser – the TCP/IP deals with the request. Pop – point of presence Place where your ISP hardware enables transfer of data TCP – this packets up the request of a page into smaller chunks to be sent over the Internet or reassembles the page from the web server once received. Laksdjflk ;aslkjalsjdf ;laksdj fl;kasjdf ;lkajdsfsl kjdalks jdfajsf;lkj sa;dfj ;asldkjf;alksdj f kj hlijhjh ih ihiihpiuhpiuhpiuh piuh piuh Any site IP – This is a unique number assigned to your router and other routers around the world. Web address URL’s are really IP addresses used to find the correct site or person. Eg: (www.somesite.com) could be 192.168.1.68 Web servers know where to send the page to when requested. Your router attaches your IP address to your request for a page (when a link is clicked on the search page of Google for example) and also sends the request to the correct server via the sites IP address NAP - Network access point Allows ISP’s to communicate & send data between each other