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signal of Data communication

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 In data communication, signals are used to represent and transmit data over a communication channel. These signals carry the information from the sender to the receiver. Here are some common types of signals used in data communication: Analog Signals: Analog signals are continuous and vary in amplitude and frequency. They are used to represent continuous data, such as voice or audio signals. Analog signals can be transmitted over analog communication channels, such as traditional telephone lines, using modulation techniques like amplitude modulation (AM) or frequency modulation (FM). Digital Signals: Digital signals represent discrete data using a series of discrete values, typically binary digits (0s and 1s). Digital signals are commonly used in modern data communication systems. They can be transmitted over digital communication channels, such as Ethernet or optical fibers. Digital signals are less susceptible to noise and interference compared to analog signals.
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Advantage of Data Communication

  Data communication offers several advantages that facilitate efficient and reliable transmission of information. Here are some key advantages of data communication: Speed and Efficiency: Data communication enables fast and efficient transmission of data over long distances. With high-speed communication channels and advanced protocols, large volumes of data can be transmitted quickly, allowing for faster decision-making, real-time collaboration, and efficient data sharing. Global Connectivity: Data communication provides global connectivity, allowing individuals and organizations to communicate and exchange data across geographical boundaries. The internet, in particular, has revolutionized data communication by enabling worldwide connectivity, facilitating global trade, information sharing, and international collaboration. Data Sharing and Collaboration: Data communication allows for seamless sharing and collaboration of data among multiple users, devices, and systems. It enable...
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Data Communication

 Introduction Data communication refers to the transmission and reception of digital or analog data between two or more devices or systems. It involves the exchange of information in the form of bits or bytes over a communication medium such as cables, fiber optics, wireless channels, or satellites. The purpose of data communication is to enable the sharing and transfer of data, voice, video, or any other form of information between different entities, including computers, smartphones, servers, routers, and other network devices. Data communication typically involves the following components: Sender: The device or system that initiates the data transmission and converts the information into a suitable format for transmission. Receiver: The device or system that receives the transmitted data and converts it back into a usable form. Medium: The physical channel or transmission path through which the data is transmitted. It can be wired (e.g., copper cables, fiber optics) or wireless ...
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Use of Computer Network.

   Use of Computer Network. Information and Resource Sharing/computer network device and software − Computer networks allow organizations having units which are placed apart from each other, to share information in a very effective manner. Programs and software in any computer can be accessed by other computers linked to the network. It also allows sharing of hardware equipment, like printers and scanners among varied users. Retrieving Remote Information − through computer networks, users can retrieve remote information on a variety of topics. The information is stored in remote databases to which the user gains access through information systems like the World Wide Web. Communication − Computer networks have increased the speed and volume of communication like never before. Electronic Mail (email) is extensively used for sending texts, documents, images, and videos across the globe. Online communications have increased by manifold times through social networking se...
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Advantage and Disadvantage of Computer Network.

  Advantage and Disadvantage of Computer Network.   The computer network is defined as a set of interconnected autonomous systems that facilitate distributed processing of information. It results in better performance with a high speed of processing.  Advantages of Network:   These are the main advantages of Computer Networks:    Central Storage of Data –   Files can be stored on a central node (the file server) that can be shared and made available to each and every user in an organization.    Anyone can connect to a computer network –   There is a negligible range of abilities required to connect to a modern computer network. The effortlessness of joining makes it workable for even youthful kids to start exploiting the data.    Faster Problem-solving –   Since an extensive procedure is disintegrated into a few littler procedures and each is taken care of by all the associated gadgets, an explicit iss...
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Computer Network-Introduction

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Computer Network               A computer network is a set of devices connected through links. A node can be computer, printer, or any other device capable of sending or receiving the data. The links connecting the nodes are known as communication channels.                         Computer Network uses distributed processing in which task is divided among several computers. Instead, a single computer handles an entire task, each separate computer handles a subset.
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