A reference model is a conceptual framework for understanding relationships. Modern data communication networks are characterized by: ... is the coordinating organization for the US' national system of standards. Focus on Test. RS 232 stands for Recommended standard number 232. This will help users to use any workstation in a network to access their data. What. 3. Because data is not stored on workstations locally. The connections of the Computers over a Network are possible through several networking devices like routers, bridges, gateways, cables, Satellites and others. Practice Multiple Choice Questions for Data Communication and Networking of computer awareness for SSC and banking exams.- Page 51 The IP addresses on this network should be reachable only within the data center and is considered the Management Security Domain. The rules and regulations are called protocols and standards in Data Communications. Some common types of data communications technologies include telecommunications, computer networking and radio/satellite communication. The resources such as printers, file servers, scanners, and internet are easily sharable among computers. IEEE 802.11 specifies an over-the-air interface between a wireless client and a base station, such as a wireless laptop and a wireless base unit or between two wireless clients, such as between two wireless laptops. RS 232. standards organization: A standards organization, sometimes referred to as a standards body, is an organization with authority to endorse official standards for given applications. How do standards fit in with regulations at the federal, manufacturing, and organizational levels? Give an example of a standard that fits in at your workplace. SDLC (Synchronous Data Link Control): (SDLC is also an abbreviation for systems development life cycle .) are the advantages and disadvantages of standards? Data communication is said to be local if communicating devices are in the same building or a similarly restricted geographical area. LANs are composed of inexpensive networking and routing equipment. Data Communication is defined as exchange of data between two devices via some form of transmission media such as a cable, wire or it can be air or vacuum also. 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. Data communication refers to the exchange of data between a source and a receiver via form of transmission media such as a wire cable. How do standards fit in with regulations at the federal, manufacturing, and organizational levels? 2. RS422 This standard gives a much higher data rate than RS232, ... 2G GSM 3G UMTS 4G LTE 5G WiFi IEEE 802.15.4 DECT cordless phones NFC- Near Field Communication Networking fundamentals What is the Cloud Ethernet Serial data USB SigFox LoRa VoIP SDN NFV SD-WAN Return to Wireless & Wired Connectivity. OSI reference model (Open Systems Interconnection): OSI (Open Systems Interconnection) is reference model for how applications can communicate over a network . Explain different Data flow directions. For occurrence of data communication, communicating devices must be a part of communication system made up of a combination of hardware or software devices and programs. The figure shows a particular example of communication between a workstation and a server through a public telephone network. For data communication to occur, the communicating devices must be part of a communication system made up of a combination of hardware and software. In this blog, I have shared selective important questions of Data Communications and Networking for IT Officer and Competitive Exams.

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