Glossary
179
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 caches the results of all requests
for a certain amount of 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).
Summary of Contents for SGH E310
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