User manual

 Telnet — Telecommunication Network. A network protocol used on the Internet or on local area

networks.

 TFTP — Trivial File Transfer Protocol. A ﬁle transfer protocol with a subset of FTP functionality.

 UA — User Agent. Any device or software used to access a web page. A user agent might be a web

browser, a smart phone, or a screen reader.

 UDP — User Datagram Protocol. A simple transport protocol used to transfer information on the

Internet.

 UI — User Interface. The part of a software application or hardware device that a user sees and

interacts with.

 USB — Universal Serial Bus. A connection type for computing device peripherals such as a printer,

mobile modem, etc. USB connectors may be used for data transfer or charging.

 USB Port Types — The USB ports on computers and hubs have a rectangular Type A socket, and

peripheral devices have a cable with a Type A plug. Peripherals that do not have an attached cable

have a square Type B socket on the device and a separate cable with a Type A and Type B plug. Ports

and connectors are available in diﬀerent sizes (for example, standard, mini, and micro).

 VNC — Virtual Network Computing. A graphical desktop sharing system that uses the RFB protocol to

remotely control another computer.

 VPN — Virtual Private Network. A secure private network that runs over the public Internet.

Commonly used to connect to an oﬃce network from elsewhere.

 VPN Passthrough — A feature that allows a client to connect to a VPN server.

 WAN — Wide Area Network. A public network that extends beyond architectural, geographical, or

political boundaries (unlike a LAN, which is usually a private network located within a room, building,

or other limited area).

 WCDMA — Wideband Code-Division Multiple Access. A 3G mobile wireless technology that promises

much higher data speeds to mobile and portable wireless devices. Another name for UMTS.

 WEP — Wired Equivalent Privacy. An IEEE standard security protocol for 802.11 networks. Superseded

by WPA and WPA2.

 Wi-Fi — Wireless Fidelity. Any system that uses the 802.11 standard developed and released in 1997 by

the IEEE.

 Wi-Fi Client — A wireless device that connects to the Internet via Wi-Fi.

 WLAN — Wireless Local Area Network. A typically low-power network that transmits a wireless signal

over a span of a few hundred feet and usually only to stationary devices.

 WPA/WPA2 — Wi-Fi Protected Access. A security protocol for wireless 802.11 networks from the Wi-Fi

Alliance.

 WWAN — Wireless Wide Area Network. Wireless network technologies deployed over a large

geographical area to a large number of users (see WLAN). This service is usually provided through

cellular providers. WWAN connectivity allows a user with a laptop and a WWAN device to surf the

Internet, check email, or connect to a virtual private network (VPN) from anywhere within the

coverage area of the network operator.