QUICK GLANCE FOR NET EXAM -8



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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