Samsung SGH-C207 User Manual (user Manual) (ver.1.0) (English) - Page 212

Proxy Server, PUK PIN Unblocking Key, Roaming, SIM Subscriber Identification Module

Page 212 highlights

Security code that protects the phone/SIM against unauthorized 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 server that 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 time. If a user requests a web page that it already fetched for another user, it returns the page instead of forwarding the request to the Web server, which can be a time-consuming operation. PUK (PIN Unblocking Key) Security code that protects the phone/SIM against unauthorized 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. Roaming Use of your phone when you are outside your home area (when traveling for example). SIM (Subscriber Identification Module) Card containing a chip with all the information required to operate the phone (network and memory information, as well as the subscriber's personal data). The SIM card fits into a Glossary 211

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Glossary
211
Security code that protects the phone/SIM against
unauthorized 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 server that 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 time. If a user requests a web page that
it already fetched for another user, it returns the page
instead of forwarding the request to the Web server, which
can be a time-consuming operation.
PUK (PIN Unblocking Key)
Security code that protects the phone/SIM against
unauthorized 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.
Roaming
Use of your phone when you are outside your home area
(when traveling for example).
SIM (Subscriber Identification Module)
Card containing a chip with all the information required to
operate the phone (network and memory information, as well
as the subscriber’s personal data). The SIM card fits into a