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The VoIp Solution Workbook is a comprehensive guide to terms and definitions that
are commonly used in reference to understanding VoIP Solutions.
are commonly used in reference to understanding VoIP Solutions.
| Gateway |
In telecommunications, the term gateway has the following meanings:
In a communications network, a network node equipped for interfacing with
another network that uses different protocols. A gateway may contain devices
such as protocol translators, impedance matching devices, rate converters, fault
isolators, or signal translators as necessary to provide system interoperability. It
also requires the establishment of mutually acceptable administrative
procedures between the two networks. A protocol translation/mapping gateway
interconnects networks with different network protocol technologies by
performing the required protocol conversions. Loosely, a computer is configured
to perform the tasks of a gateway. For a specific case, see default gateway.
Routers exemplify special cases of gateways.
Gateways, also called protocol converters, can operate at any layer of the OSI
model. The job of a gateway is much more complex than that of a router or
switch. Typically, a gateway must convert one protocol stack into another.
Gateways that connect two IP-based networks, have two IP addresses, one on
each network. A gateway address like 192.168.1.1 is a Private address, and is
the address to which traffic is sent from the LAN. The other IP address is the
Wide Area Network address, this is the address to which traffic is sent coming
from the WAN. When this is the Internet, that address is usually assigned by an
ISP.
When talking about the gateway IP address, commonly the LAN-address of the
gateway is meant.
If private addressing is used then the addresses of computers connected to the
LAN are hidden behind the WAN gateway. That is, remote computers located
"out there" on the WAN can only communicate with LAN stations via the
gateway's WAN IP address. To regulate traffic between the WAN and the LAN,
the gateway commonly performs Network Address Translation (NAT),
presenting all of the LAN traffic to the WAN as coming from the gateway's WAN
IP address and doing packet sorting and distribution of return WAN traffic to the
local network.
Attributes and Credits
The information and facts supplied on this subject
derive from http://en.wikipedia.org/wiki/Main_Page
In a communications network, a network node equipped for interfacing with
another network that uses different protocols. A gateway may contain devices
such as protocol translators, impedance matching devices, rate converters, fault
isolators, or signal translators as necessary to provide system interoperability. It
also requires the establishment of mutually acceptable administrative
procedures between the two networks. A protocol translation/mapping gateway
interconnects networks with different network protocol technologies by
performing the required protocol conversions. Loosely, a computer is configured
to perform the tasks of a gateway. For a specific case, see default gateway.
Routers exemplify special cases of gateways.
Gateways, also called protocol converters, can operate at any layer of the OSI
model. The job of a gateway is much more complex than that of a router or
switch. Typically, a gateway must convert one protocol stack into another.
Gateways that connect two IP-based networks, have two IP addresses, one on
each network. A gateway address like 192.168.1.1 is a Private address, and is
the address to which traffic is sent from the LAN. The other IP address is the
Wide Area Network address, this is the address to which traffic is sent coming
from the WAN. When this is the Internet, that address is usually assigned by an
ISP.
When talking about the gateway IP address, commonly the LAN-address of the
gateway is meant.
If private addressing is used then the addresses of computers connected to the
LAN are hidden behind the WAN gateway. That is, remote computers located
"out there" on the WAN can only communicate with LAN stations via the
gateway's WAN IP address. To regulate traffic between the WAN and the LAN,
the gateway commonly performs Network Address Translation (NAT),
presenting all of the LAN traffic to the WAN as coming from the gateway's WAN
IP address and doing packet sorting and distribution of return WAN traffic to the
local network.
Attributes and Credits
The information and facts supplied on this subject
derive from http://en.wikipedia.org/wiki/Main_Page