ZyXEL Communications 400, User Manual

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Gateway 400 User Guide | Glossary
64
Type of Internet
connection A flat rate or a time-based tariff rate can be used for the Internet connection.
When using a time-based tariff, the connection should be manually or auto-
matically disconnected after a specified time of inactivity to avoid unneces-
sary connection charges.
U
UDP With the UDP protocol, the data information is sent continuously. No check is
performed to verify that the received data information is either complete or
error-free. This procedure ensures fast data transfer, but can also result in
malformed data packets. This setting is recommended for real-time applica-
tions, such as online games.
USB The Universal Serial Bus (USB) is a serial bus system for connecting your Gate-
way 400 with external devices. USB storage devices and printers can be con-
nected to running systems (hot plugging), and their properties can be
detected automatically.
User Guide This User Guide provides you with detailed information. The latest edition of
this User Guide can be found on the Internet at
www.zyxel.com in the Service
Area.
V
VoIP Voice over Internet Protocol. With Internet telephony (VoIP), the information
required for telephony (i.e., to control the connection setup) and voice can be
transmitted over a network that is also used for data transmissions (e.g., In-
ternet). The equipment used for this purpose may include computers, special
IP telephony devices and classical phones connected via adapters.
VoIP Provider Voice-over-IP provider, also referred to as Internet telephony provider or SIP
provider.
W
WANoE WANoE (Wide Area Network over Ethernet) refers to the use of a separate mo-
dem (e.g., a cable modem) to establish a connection to the Internet.
WPA WPA (Wi-Fi Protected Access) is an encryption method for a wireless network
(WLAN). Ever since WEP has proved to be unsafe, WPA has been established
as the new standard. The successor is WPA2, which implements the basic fea-
tures of the new IEEE 802.11i security standard.