Glossary | SMC Networks SMC2670W manual

Section 12 Glossary

802.11- 802.11 refers to a family of specifications developed by the IEEE for wireless LAN technology. 802.11 specifies an over-the-air interface between a wireless client and a base sta- tion or between two wireless clients. The IEEE accepted the specification in 1997.

802.11b - An extension to 802.11 that applies to wireless LANS and provides 11 Mbps transmission (with a fallback to 5.5, 2 and 1 Mbps) in the 2.4 GHz band. 802.11b uses only DSSS.

DHCP (Dynamic Host Configuration Protocol) - A protocol for assigning dynamic IP addresses to devices on a network. With dynamic addressing, a device can have a different IP address every time it connects to the network. In some systems, the device's IP address can even change while it is still connected. DHCP also supports a mix of static and dynamic IP addresses.

DNS (Domain Name System) - Is the system that is used to translate Internet domain names into Internet Protocol (IP) addresses. A domain name is a meaningful and easy-to- remember “handle” for an Internet address.

DSSS (Direct-Sequence Spread Spectrum) - Is a transmission technology used in wireless transmissions where a data signal at the sending station is combined with a higher data rate bit sequence, or chipping code, that divides the user data accord- ing to a spreading ratio. The chipping code is a redundant bit pattern for each bit that is transmitted, which increases the sig- nal's resistance to interference. If one or more bits in the pat- tern are damaged during transmission, the original data can be recovered due to the redundancy of the transmission.

Dynamic IP Address - An IP address that is automatically assigned to a client station in a TCP/IP network, typically by a DHCP server. Network devices that serve multiple users, such as servers and printers, are usually assigned static IP addresses.