A gateway is a network point that acts as an entrance to
another network. On the Internet, a node or stopping point can be either a
gateway node or a host (end-point) node. Both the computers of Internet users
and the computers that serve pages to users are host nodes. The computers that
control traffic within your company's network or at your local Internet service
provider (ISP) are gateway nodes.
A network
gateway is an inter networking system capable of joining together two
networks that use different base protocols. A network gateway can be
implemented completely in software, completely in hardware, or as a combination
of both. Depending on the types of protocols they support, network gateways can
operate at any level of the OSI model.
Because a network gateway, by definition, appears at the
edge of a network, related capabilities like firewalls tend to be integrated
with it. On home networks, a broadband router typically serves as the network
gateway although ordinary computers can also be configured to perform
equivalent functions.
How Gateways Works
A gateway is a network point
that works as an access to another network. Generally in intranet a node can be
either a gateway node or the nodes that join the network are gateways. In large
organization where the computers control the traffic between organization
networks are gateway nodes. Like that the computers used by ISP to connect
different user with each other at a time to the internet are gateway nodes. In
a project of any business company computer server work as a gateway nodes and
it may be proxy server or firewall some time. A gateway may connected to a
router because a router exactly known where to through a given packet of data
that appears at the gateway then a switch finalize the actual in and out path
of the gateway for the specified packet .A gateway is a compulsory features of
routes even though other devices can perform as a gateway. The operating system
mostly used this term and internet connection sharing act as a gateway and creating
a connection among internal network.
Gateway Devices
A
gateway is full of various types of devices which are essential to make
available system interoperability as signal translators. The other devices are
protocol translators, impedance matching devices, rate converters, and fault
isolators. Some time gateway attached with both router and switch to perform
action. When a user using home network with gateway has a transceiver used to
set up a wireless connection..
Gateway Usage, Uses of Gateways
There are many kind of usage of gateway in a
network as listed below.
· A
gateway can be implemented in software, hardware and some time as a mixture of
together. There are lots of equipments and techniques which are being processed
such as voice and data communication.
· The
gateways are the best option to achieve the multimedia communications between
dissimilar networks because every network has different protocol and
characteristics.
· Gateways
are also a key mechanism of any telephony communications. Gateway is offering
bridge between telephone network and internet.
· For real
time communication gateway supporting audio conversion and carry out extinction
and call setup. Gateway also controls the processing information across the
network which contains information about to set up the actual end to end call.
· A
gateway may also install on a standalone device. A gateway performs as the
interface between local and wide area protocols such as TCP/IP on the Internet.
· Gateway
is also offering on-line services exclusive of having a preceding service
agreement or a continuing association with the service supplier.
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