HW831 User Guide Rev 1.0
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IEEE 802.11g: A set of standards developed for wireless LAN which allows wireless devices
from different manufacturers to communicate with each other. The IEEE 802.11g standard
operates at a maximum data transfer rate of 54 Mbps at frequency 2.4GHz.
IP: Internet Protocol. IP is the network protocol used for delivering data across the Internet.
IP Address: Internet Protocol Address. An IP address is a unique address used to identify
individual computer connected to an IP network, e.g. the Internet. An IP address is made up
of 32 bits which is normally expressed in 8-bit decimal numbers of the format
xxx.xxx.xxx.xxx.
IPSec: Internet Protocol Security. IPSec is a suite of protocols that provides traffic
encryption, integrity validation, peer authentication and anti-replay. IPSec is widely used to
implement virtual private network (VPN).
LAN: Local Area Network. A LAN is a network formed by a group of computers connected
to each other via cabled or wireless connections. A computer connected to the LAN is able to
access other computers on the network, allowing a convenient way of sharing resources over
the established links.
MAC Address: Media Access Control Address. A MAC address is a unique identifier
attached to each network card which can be used to identify individual computer on a
network. It is made up of 12 hexadecimal digits of the format xx-xx-xx-xx-xx-xx.
NTP Server: Network Time Protocol Server. An NTP server updates the clock times of
computers connected to the network via Network Time Protocol (NTP). This ensures
accurate synchronization of computer clock times of all computers on the network.
PDP: Packet Data Protocol. PDP is a network protocol used for exchanging data between a
packet switching network and a GPRS/3G network.
PPP: Point-to-Point Protocol. PPP is a standard protocol used for dial-up modem
connections to the Internet. PPP provides a link from your computer to a server where your
data packets will be forwarded to the Internet and vice versa.
PPTP: Point-to-Point Tunneling Protocol. PPTP is a protocol used for implementing virtual
private network (VPN). It enables the secure transfer of data between two VPN end points.
SPI Mode: Stateful Packet Inspection Mode. A firewall typically behaves as a filter between
one network to another. A firewall with SPI mode examines the contents of the data packets
instead of just filtering them. All incoming data packets are analyzed to confirm that they are
legitimate replies to outgoing requests made from client computers within the network.
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Subnet Mask: A subnet mask determines which portion of an IP address belongs to the
network and which portion belongs to the client computer.
TCP: Transmission Control Protocol. TCP is a communication protocol used by the Internet.
TCP breaks up the data packets at the sending end and reassembles them at the receiving end.
Received packets are checked and acknowledged, while lost or corrupted packets are resent.
