62 Glossary
• 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).
• VPN — Virtual Private Network. A secure private network that
runs over the public Internet. Commonly used to connect to
an office network from elsewhere.
• WCDMA — Wideband Code Division Multiple Access. An air
interface standard found in 3G mobile telecommunications
networks. The most-commonly used member of the UMTS
family.
• WWAN — Wireless 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).
• WEP — Wired Equivalent Privacy. An IEEE standard security
protocol for 802.11 networks. Superseded by WPA and WPA2.
• WPA/WPA2 — Wi-Fi Protected Access. A security protocol for
wireless 802.11 networks from the Wi-Fi Alliance.
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