Chapter 1. Before You Start
Air Live IAS-2000 User’s Manual V1.0
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TFTP
Trivial File Transfer Protocol. A version of the TCP/IP FTP protocol that uses UDP and has no directory or password
capability.
UDP
User Datagram Protocol. A network protocol for transmitting data that does not require acknowledgement from the
recipient of the data that is sent.
Upgrade
To replace existing software or firmware with a newer version.
Upload
To transmit a file over a network.
URL
Uniform Resource Locator. The address of a file located on the Internet.
VoIP
Voice transmission using Internet Protocol to create digital packets distributed over the Internet. VoIP can be less
expensive than voice transmission using standard analog packets over POTS (Plain Old Telephone Service).
VPN
Virtual Private Network. A type of technology designed to increase the security of information transferred over the
Internet. VPN can work with either wired or wireless networks, as well as with dial-up connections over POTS. VPN
creates a private encrypted tunnel from the end user's computer, through the local wireless network, through the
Internet, all the way to the corporate servers and database.
Walled Garden
On the Internet, a walled garden refers to a browsing environment that controls the information and Web sites the
user is able to access. This is a popular method used by ISPs in order to keep the user navigating only specific
areas of the Web, whether for the purpose of shielding users from information -- such as restricting children's access
to pornography -- or directing users to paid content that the ISP supports. America Online is a good example of an
ISP that places users in a walled garden.
Schools are increasingly using the walled garden approach in creating browsing environments in their networks.
Students have access to only limited Web sites, and teachers need a password in order to leave the walled garden
and browse the Internet in its entirety.
The term walled garden also commonly refers to the content that wireless devices such as mobile phones have
access to if the content provided by the wireless carrier is limited.