Samsung D410 User Manual - Page 192
PIN Personal Identification Number, Proxy Server, PUK PIN Unblocking Key, Roaming
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Glossary PIN (Personal Identification Number) Security code that protects the phone against unauthorised use. The PIN is supplied by the service provider with the SIM card. It may be a four to eight-digit number and can be changed, as required. Proxy Server A proxy server resides between a Web client, such as a web browser, and a real Web server and acts as an intermediary between them. When some people browse a web site, their browser is not actually connecting to the web server. The request from their browser goes to a proxy server, and the proxy server makes the request to the web server. A proxy server can improve performance for groups of users because it cache the results of all requests for a certain amount of a time. If a user requests a web page that it already loaded for another user, it reloads the page instead of forwarding the request to the Web server, which can be a time-consuming operation. PUK (PIN Unblocking Key) Security code used to unlock the phone when an incorrect PIN has been entered three times in succession. The eight-digit number is supplied by the service provider with the SIM card. Roaming Use of your phone when you are outside your home area (when travelling for example). 192