Page 162 - DLIS408_INFORMATION_TECHNOLOGY-APPLICATIONSL SCIENCES

Unit 14: Web Portal

14.2 Gateway (Telecommunications) Notes

Juniper SRX210 service gateway

In telecommunications, the term gateway has the following meaning:
1. 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 both networks.
A protocol translation/mapping gateway interconnects networks with different
network protocol technologies by performing the required protocol conversions.
2. Loosely, a computer or computer program configured to perform the tasks of a gateway.
Gateways, also called protocol converters, can operate at any network layer. The activities of a
gateway are more complex than that of the router or switch as it communicates using more than
one protocol.

Internet-to-Orbit Gateway

An Internet to orbit gateway (I2O) is a machine that acts as a connector between computers or
devices connected to the Internet and computer systems orbiting the earth, like satellites or even
manned spacecrafts. Such connection is made when the I2O establishes a stable link between the
spacecraft and a computer or a network of computers on the Internet, such link can be control
signals, audio frequency, or even visible spectrum signals.

Cloud Gateway

A Cloud storage gateway is a network appliance or server which resides at the customer premises
and translates cloud storage APIs such as SOAP or REST to block-based storage protocols such as
iSCSI or Fibre Channel or file-based interfaces such as NFS or CIFS.

Notes Cloud storage gateways enable companies to integrate cloud storage into applications
without moving the applications into the cloud. In addition they simplify data protection.

14.3 Electronic Journal
Electronic journals, also known as e-journals, e-journals, and electronic serials, are scholarly journals
or intellectual magazines that can be accessed via electronic transmission. In practice, this means that
they are usually published on the Web. They are a specialized form of electronic document: they
have the purpose of providing material for academic research and study, and
they are formatted approximately like journal articles in traditional printed journals. Being in electronic
form, articles sometimes contain metadata that can be entered into specialized databases, such as
DOAJ or OACI, as well as the databases and search-engines for the academic discipline concerned.

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