NetComm NB9 User Giude page 72

Filtering
filtering rule
Firewall
FTP
GGP
Gbps
GRE
hop
hop count
host
HTTP
ICMP
IGMP
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YML790 Rev1
To screen out selected types of data, based on filtering
rules. Filtering can be applied in one direction (upstream
or downstream), or in both directions.
A rule that specifies what kinds of data a routing device
will accept and/or reject. Filtering rules are defined to
operate on an interface (or multiple interfaces) and in a
particular direction (upstream, downstream, or both).
Any method of protecting a computer or LAN connected
to the Internet from intrusion or attack from the outside.
Some firewall protection can be provided by packet filter-
ing and Network Address Translation services.
File Transfer Protocol - A program used to transfer files
between computers connected to the Internet. Common
uses include uploading new or updated files to a web
server, and downloading files from a web server.
Gateway to Gateway Protocol. An Internet protocol that
specifies how gateway routers communicate with each
other.
Abbreviation for Gigabits (GIG-uh-bits) per second, or
one billion bits per second. Internet data rates are often
expressed in Gbps.
Generic Routing Encapsulation. TCP/IP protocol suite,
transport layer encapsulation protocol.
When you send data through the Internet, it is sent first
from your computer to a router, and then from one router
to another until it finally reaches a router that is directly
connected to the recipient. Each individual "leg" of the
data's journey is called a hop.
The number of hops that data has taken on its route to its
destination. Alternatively, the maximum number of hops
that a packet is allowed to take before being discarded ,
See also TTL.
A device (usually a computer) connected to a network.
Hyper-Text Transfer Protocol HTTP is the main protocol
used to transfer data from web sites so that it can be
displayed by web browsers. See also web browser
Internet Control Message Protocol An Internet protocol
used to report errors and other network-related informa-
tion. The ping command makes use of ICMP.
Internet Group Management Protocol An Internet protocol
that enables a computer to share information about its
membership in multicast groups with adjacent routers.
A multicast group of computers is one whose members
have designated as interested in receiving specific con-
tent from the others. Multicasting to an IGMP group can
be used to simultaneously update the address books of
a group of mobile computer users or to send company
newsletters to a distribution list.
NB9/NB9W ADSL2+ VoIP Router