User's Manual

Octopus G Series Wireless AP
TwinMOS
Page 25
LAN(Local Area Network): A group of computers and peripheral devices connected to share
resources.
MAC (Medium Access Control) Address: A unique number that distinguishes network cards.
MTU: MTU (Maximum Transmission/Transfer Unit) is the largest packet size that can be sent over a
network. Messages larger than the MTU are divided into smaller packets.
NAT: NAT (Network Address Translation - also known as IP masquerading) enables an organization to
present itself to the Internet with one address. NAT converts the address of each LAN node into one IP
address for the Internet (and vice versa). NAT also provides a certain amount of security by acting as a
firewall by keeping individual IP addresses hidden from the WAN.
Preamble: Preamble refers to the length of a CRC (Cyclic Redundancy Check) block that monitors’
communications between roaming wireless enabled devices and access points.
Protocol: A standard way of exchanging information between computers.
RADIUS (Remote Authentication Dial In User Service): A server that issues authentication key to
clients.
RAM (Random Access Memory): Non-permanent memory.
RIP: RIP (Routing Information Protocol) is a routing protocol that is integrated in the TCP/IP protocol.
RIP finds a route that is based on the smallest number of hops between the source of a packet and its
destination.
Router: Device that can connect individual LANs and remote sites to a server.
Roaming: The ability to use a wireless device while moving from one access point to another without
losing the connection.
RTS: RTS (Request To Send) is a signal sent from the transmitting station to the receiving station
requesting permission to transmit data.
Server: Servers are typically powerful and fast machines that store programs and data. The programs
and data are shared by client machines (workstations) on the network.
Static IP Address: A permanent IP address is assigned to a node in a TCP/IP network. Also known as
global IP.
Subnet Mask: Subnet Masks (SUBNET work masks) are used by IP protocol to direct messages into a
specified network segment (i.e., subnet). A subnet mask is stored in the client machine, server or router
and is compared with an incoming IP ad-dress to determine whether to accept or reject the packet.
SSID: SSID (Service Set Identifier) is a security measure used in WLANs. The SSID is a unique
identifier attached to packets sent over WLANs. This identifier emulates a password when a wireless
device attempts communication on the WLAN. Because an SSID distinguishes WLANS from each other,