Baseband transmission : A
technique in which bits are transmitted without any modulation.
Cable modem : A modem used
for connecting home computer to television cable.
Classed IP address :
Structured IP address with three classes A, B and C.
Classless IP address :
Unstructured IP address with no class definition and of variable length.
Client : A human being or a
computer that accesses the services of a server.
Datagram : A unit of data
usually transmitted in an independent manner.
End-to-end : A connection
between peer entities in two end systems that run applications.
Entities : Hardware or
software modules that implement functions of a layer.
Flow control : A technique
for regulating the speed of despatch of data units matching the capabilities of
the source and the destination computers. Traversal of a signal from a ground
station to a satellite and back to another ground station.
Host : Any computer
connected to Internet.
Hub : In satellite
communication, hub is the master earth station. In LANs, hub is a device to
which computers are connected in a star fashion.
Internet protocol : The
protocol that runs on the Internet layer and is used for delivering datagrams
on best of efforts basis.
Internetworking : Connecting
two or more networks.
IP' address : Unique address
assigned to a host on Internet.
IP datagram : Data unit
transported by IP protocol.
Layered architecture :
Communication architecture in which functions are performed in a stacked manner.
Link-to-link : Connection
between peer entities in adjacent systems.
Low earth orbit : Orbits at
around 1000-3000 km altitude.
Multiple access : Access to
a shared medium by a number of stations.
Open system : A system that
follows IS0 standards.
Peer entities : Entities at
the same level on different systems.
Port : An interface point
between to adjacent layers.
Port binding : Allocation of
a port number to an application.
Protocol : Procedure for
exchange of data units.
Protocol data unit : Data
unit carrying both protocol control information and user data.
Protocol Suite : A set of
protocols in all layers of a communication architecture selected for a
particular app location area.
Scalability : Ability to
increase the capacity of a system without affecting the operations.
Server : A system that
provides a set of specified services.
Set top box : A unit that
allows a TV set to function as a low - end computer.
Turn around delay : Time
taken for signal to traverse from one ground station to another and back via
satellite.
Transmission control protocol : A connection oriented protocol used in large data transfers.
User Datagram : A data unit
transmitted independently at the user level.
Bluetooth : Low power radio
technology to enable two or more devices that are located in the near vicinity
of each other to interact.
B -ISDN : Broadband ISDN.
See ISDN below. An ISDN with very large information carrying capacity.
Cell switching : A
convergent switching technique that combines the strengths of circuit and
packet switching.
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