Astak R4020A - User Manual - Manual (Page 79)

78
Glossary
MIMO - Multiple-input and multiple-output (MIMO) is the use of multiple antennas
at both the transmitter and receiver to improve communication performance.
802.11b - 802.11b is used in a point-to-multipoint configuration, wherein an access
point communicates via an omnidirectional antenna with one or more nomadic or
mobile clients that are located in a coverage area around the access point. 802.11b
has a maximum raw data rate of 11 Mbit/s and uses the same CSMA/CA media
access method defined in the original standard.
802.11g - 802.11g is the third modulation standard for wireless LANs. It works in the
2.4 GHz band (like 802.11b) but operates at a maximum raw data rate of 54 Mbit/s,
or about 19 Mbit/s net throughputs.
802.11n - 802.11n has a significant increase in the maximum net data rate from 54
Mbit/s to 600 Mbit/s with the use of four spatial streams at a channel width of 40
MHz. 802.11n standardized support for multiple-input multiple-output and frame
aggregation, and security improvements, among other features.
802.1d Spanning Tree - The Spanning Tree Protocol (STP) is a network protocol that
ensures a loop-free topology for any bridged Ethernet local area network. The basic
function of STP is to prevent bridge loops and the broadcast radiation that results
from them. Spanning Tree Protocol (STP) is standardized as IEEE 802.1d.
802.1x Authentication - IEEE 802.1x is part of the IEEE 802.1 group of networking
protocols. It provides an authentication for wireless local area networks (WLANs),
which allowing a user to be authenticated by a central authority.
LAN - Local Area Network (LAN) is a local computer network for communication
between computers.
WAN - Wide Area Network (WAN) is a network that covers a broad area (i.e., any
telecommunications network that links across metropolitan, regional, or national
boundaries) using private or public network transports.
WLAN - Virtual Local Area Network (WLAN) is a technology which combines
computer network and wireless communication system.
VLAN - Wireless Local Area Network (VLAN) provides different domains which are
mutually isolated so that packets can only pass between them via one or more
routers.
DSL - Digital Subscriber Line (DSL) is a family of technologies that provide internet
access by transmitting digital data over the wires of a local telephone network.
DHCP - The Dynamic Host Configuration Protocol (DHCP) is a network protocol that is
used to configure network devices so that they can communicate on an IP network.
DNS - The Domain Name System (DNS) is a hierarchical distributed naming system for
computers, services, or any resource connected to the Internet or a private network.