Appendix
B.1 Terms
SCALANCE W1750D UI
Configuration Manual, 02/2018, C79000-G8976-C451-02
555
VPN A Virtual Private Network (VPN) network that uses a public telecommunication infrastructure, such as
the Internet, to provide remote offices or individual users with secure access to their organization's
network. A VPN ensures privacy through security procedures and tunneling protocols such as the Lay-
er Two Tunneling Protocol ( L2TP ). Data is encrypted at the sending end and decrypted at the receiv-
W-CDMA Officially known as IMT-2000 direct spread; ITU standard derived from Code-Division Multiple Access
(CDMA). Wideband code-division multiple access (W-CDMA) is a third-generation (3G) mobile wireless
technology that promises much higher data speeds to mobile and portable wireless devices than com-
monly offered in today's market.
Wi-Fi A term for certain types of WLANs. Wi-Fi can apply to products that use any 802.11 standard. Wi-Fi
has gained acceptance in many businesses, agencies, schools, and homes as an alternative to a wired
LAN. Many airports, hotels, and fast-food facilities offer public access to Wi-Fi networks.
WEP Wired equivalent privacy (WEP) is a security protocol specified in 802.11b, designed to provide a
WLAN with a level of security and privacy comparable to what is usually expected of a wired LAN. Data
encryption protects the vulnerable wireless link between clients and access points; once this measure
has been taken, other typical LAN security mechanisms such as password protection, end-to-end en-
cryption,
virtual private networks (VPNs), and authentication can be put in place to ensure privacy.
wireless Describes telecommunications in which electromagnetic waves (rather than some form of wire) carry
the signal over part or all of the communication path.
wireless network In a Wireless LAN (WLAN), laptops, desktops, PDAs, and other computer peripherals are connected to
each other without any network cables.
These network elements or clients use radio signals to communicate with each other. Wireless net-
works are set up based on the IEEE 802.11 standards.
WISP Wireless ISP (WISP) refers to an internet service provider (ISP) that allows subscribers to connect to a
server at designated hot spots (access points) using a wireless connection such as Wi-Fi. This type of
ISP offers broadband service and allows subscriber computers, called stations, to access the Internet
and the web from anywhere within the zone of coverage provided by the server antenna, usually a
region with a radius of several kilometers.
wireless service
provider
A company that offers transmission services to users of wireless
devices through radio frequency (RF) signals rather than through end-to- end wire communication.
WLAN Wireless local area network (WLAN) is a local area network (LAN) that the users access through a
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