Satellite radio, quite simply, is a non-terrestrial microwave transmission system utilizing a space relay station satellites have proved invaluable in extending the reach of voice, data, and video communications around the globe and into the most remote regions of the world. Computer networks are essentially communications networks that exist to enhance the quantity, quality and speed of communications from one point to another or others. A communication satellite is an artificial satellite stationed in space for the purpose of telecommunications modern communication satellites use a variety of orbits including geostationary orbits, molina orbits, other elliptical orbits and low earth orbits. Further computer communication networks are grouped into three categories based on technology and communication media used, namely, (i) public switched data network (psdn) (ii) public switched telephone network (pstn) and (iii) integrated service data network (isdn. In a network, a communication channel is the physical path the transmission signals travel it is the path information travels from computer to computer how do the computers in a network connect to each other.
Satellite communications architecture • identify requirements • specify architectures • determine link data rates • design & size each link. Computer networks can be classified according to the hardware and software technology that is used to interconnect the individual devices in the network, such as optical fiber, ethernet, wireless lan, homepna, power line communication or ethernet uses physical wiring to connect devices. Contents preface xiii 1 introduction 1 11 background 1 12 uses of computer communications 4 121 computer-oriented communication 4 122 telecommunications 8.
A communications satellite is an artificial satellite that relays and amplifies radio telecommunications signals via a transponder it creates a communication channel between a source transmitter and a receiver at different locations on earth. Communications network features and considerations when selecting a communications system for plant operations, it is common to use only hardwire to connect remote equipment to the scada master given the short distances involved. This mobile satellite communication network diagram was created using the conceptdraw pro diagramming and vector drawing software extended with the telecommunication network diagrams solution from the computer and networks area of conceptdraw solution park. Microwave radio transmission is commonly used in point-to-point communication systems on the surface of the earth, in satellite communications, and in deep space radio communications other parts of the microwave radio band are used for radars , radio navigation systems, sensor systems, and radio astronomy. Ethernet is a network standard that specifies no computer controls when data can be transmitted the token ring standard specifies that computers and devices on the network share or pass a special signal (token) tcp/ip is a network standard that defines how messages are routed from one end of a network to another.
Computer networks: a computer network is an interconnection of various computers to share software, hardware, resources and data through a communication medium between them the connection between the separate computers can be done via a copper wire, fiber optics, microwaves or communication satellite. 81 introduction to computer networks : a computer network, often simply referred to as a network, is a collection of computers and devices interconnected by communications channels that facilitate communication and allows sharing of resources and information among interconnected devices. Computer communications is a peer-reviewed international journal that publishes high-quality scientific articles (both theory and practice) and survey papers covering all aspects of future computer communication networks (on all layers, except the physical layer), with a special attention to the evolution of the internet architecture, protocols. Research in computer communication networks is underway to provide new methods for design, analysis, and optimization of increasingly complex and demanding communication new switch architectures are being developed for high-speed packet-switched networks that integrate video, voice, and data.
Computer networking is the engineering discipline concerned with the communication between computer system or devices while a group of autonomous computers and associated devices connected together by communication channels like cables or telephone lines etc is called a network. The communication of digital data among computers connected by wire, microwave, and satellite circuits is now a major enterprise that has built a strong bond between computer and communications specialists. Data communication & computer network pdf version quick guide resources job search discussion data communications refers to the transmission of this digital data between two or more computers and a computer network or data network is a telecommunications network that allows computers to exchange data.
Satellite networks - satellite networks are offered in a number of configurations telephone operating companies use satellites for data and voice transmission to mobile phones on the ground telephone operating companies use satellites for data and voice transmission to mobile phones on the ground. Communication satellites in computer networks one project addresses topics in satellite communications and the satellite, followed by three more on important examples the. Find computer network stock images in hd and millions of other royalty-free stock photos, illustrations, and vectors in the shutterstock collection thousands of new, high-quality pictures added every day.
Satellite communication: a communication satellite is a space station it receives microwave signals (or messages) from earth stations satellite transmission station that can send and receive messages is known as earth station. Internet, a system architecture that has revolutionized communications and methods of commerce by allowing various computer networks around the world to interconnect sometimes referred to as a network of networks, the internet emerged in the united states in the 1970s but did not become visible to the general public until the early 1990s. Computer networking multiple choice quiz questions and answers pdf, networking exam revision and study guide with practice tests for online exam prep and interviews networking interview questions and answers to ask, to prepare and to study for jobs interviews and career mcqs with answer keys.