Nomadix AG 5000, User Manual, Page: 272 / 286

AG 5000
268 Glossary of Terms
Mbps
(Megabits per second) A standard measure for data transmission speeds (for example, the rate at which
information travels over the Internet). 1 Mbps denotes one million bits per second. Several factors can
influence how quickly data travels, including modem speed, bandwidth capacity, and Internet traffic levels
at the time of transmission. Not to be confused with MegaBytes per second (MBps). See also,
Throughput .
MIB
(Management Information Base) A set of parameters an SNMP management station can query or establish
in the SNMP agent of a network device (for example, a router). Standard minimal MIBs have been defined,
and vendors often have their own private enterprise MIBs. In theory, any SNMP manager can talk to any
SNMP agent with a properly defined MIB. See also,
SNMP .
Misconfigured User
A Nomadix, Inc. term used to describe users who have IP address configurations that are different from the
current network. For example, if the current network is 123.45.67.89 but the user’s IP address is
10.10.10.15, then this user is considered to be “misconfigured.”
NAT
(Network Address Translation) An Internet standard that enables a Local Area Network (LAN) to use one
set of IP addresses for internal traffic and a second set of IP addresses for external traffic. A NAT box
located where the LAN meets the Internet performs all the necessary IP address translations. NAT provides
a type of firewall by hiding its internal IP addresses. Additionally, NAT enables companies to use more
internal IP addresses (because the addresses are only used internally and there’s no possibility of
conflicting with IP addresses used by other companies). NAT also allows companies to combine multiple
ISDN connections into a single Internet connection. See also,
ISDN .
Node
An addressable point on a network. A node can connect a computer system, a terminal, or various
peripheral devices to the network. Each node on a network has a distinct name. On the Internet, a node is a
host computer with a unique domain name and IP address. See also,
Domain Name and IP Address .
NTP
(Network Time Protocol) An Internet standard protocol (built on top of TCP/IP) that assures accurate
synchronization (to the millisecond) of computer clock times in a network of computers. Based on
UTC ,
NTP synchronizes client workstation clocks to the U.S. Naval Observatory master clocks. Running as a
continuous background client program on a computer, NTP sends periodic time requests to servers,
obtaining server time stamps and using them to adjust the client's clock.
OFDM
(Orthogonal Frequency Division Multiplexing) An FDM modulation technique for transmitting large
amounts of digital data over a radio wave. OFDM works by splitting the radio signal into multiple smaller
sub-signals that are then transmitted simultaneously at different frequencies to the receiver. OFDM reduces
the amount of crosstalk in signal transmissions. 802.11a WLAN technology uses OFDM.
ag5000_userguide.book Page 268 Friday, March 4, 2005 3:05 PM