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Computer Network Articles
Page 42 of 122
Difference Between Multiprocessor and Multicomputer
Both multiprocessors and multicomputers are types of parallel computing systems designed to improve performance through parallel processing. The fundamental difference is that a multiprocessor is a single computer system containing multiple processors sharing common I/O and memory resources, whereas a multicomputer is a system of several autonomous computers connected through a network, with each computer having its own independent I/O, memory, and computing resources. Multiprocessor vs Multicomputer Architecture Multiprocessor CPU1 ...
Read MoreExplain the services of the physical layer
The Physical Layer is the lowest layer in the OSI model, responsible for the actual transmission of raw bits over a physical communication channel. This layer handles the electrical, optical, and mechanical aspects of data transmission between network devices. The Physical Layer converts digital data (0s and 1s) into electrical signals, light pulses, or radio waves depending on the transmission medium used. It establishes, maintains, and terminates physical connections between communicating devices. Physical Layer Data Transmission Device A 1010110 ...
Read MoreWhat is the session layer?
The session layer is the fifth layer in the OSI model that manages sessions or dialogues between applications on different devices. It establishes, controls, and terminates connections between end systems, ensuring proper communication flow throughout the data exchange process. This layer acts as a crucial intermediary between the transport layer (Layer 4) and the presentation layer (Layer 6), handling session management while the transport layer focuses on reliable data delivery and the presentation layer handles data formatting. Session Layer in OSI Model Layer 6: Presentation Layer ...
Read MoreWhat is infrared transmission?
Infrared (IR) transmission is a wireless communication method that uses electromagnetic waves with frequencies ranging from 300 GHz to 400 THz (wavelengths from 1mm to 770 nm). IR transmission employs line-of-sight propagation, meaning the transmitter and receiver must have a clear, unobstructed path between them. A fundamental characteristic of infrared light is its inability to penetrate walls, which makes it naturally confined within rooms or enclosed spaces. This property provides inherent security benefits for indoor communications but limits its range to short-distance applications. Infrared Transmission Characteristics IR Device A ...
Read MoreWhat is Data Switching?
Data switching is the process of forwarding data from one network node to another within a computer network. When data needs to travel from a source device to a destination device across multiple network segments, switching enables this communication by establishing temporary or permanent paths between the communicating devices. A switch is a network device that operates at the data link layer (Layer 2) of the OSI model. Unlike hubs that simply repeat data to all connected devices, switches intelligently forward data only to the intended recipient, creating dedicated communication paths and reducing network congestion. How Data Switching ...
Read MoreDifferentiate between Circuit Switching, Message Switching, and Packet Switching
Circuit switching, message switching, and packet switching are three fundamental approaches used in telecommunications networks to establish communication paths and transfer data between devices. Each method has distinct characteristics regarding how connections are established, data is transmitted, and network resources are utilized. Circuit Switching In circuit switching, a dedicated physical path is established between the sender and receiver before any data transmission begins. This dedicated route remains active throughout the entire communication session and is released only after the connection is terminated. The traditional telephone network (PSTN) is the most common example of circuit switching. When you ...
Read MoreExplain the TCP Services in the Computer Network.
Following are some of the services offered by the Transmission Control Protocol (TCP) to the processes at the application layer: Stream Delivery Service Sending and Receiving Buffers Bytes and Segments Full Duplex Service Connection Oriented Service Reliable Service All the above mentioned TCP services are explained below in detail. Stream Delivery Service TCP is a stream-oriented protocol. It enables the sending process to deliver data as a stream of bytes and the receiving process to acquire data as a stream of bytes. TCP creates a working environment so that the sending and receiving ...
Read MoreWhat is MIME in the Computer Network?
MIME (Multipurpose Internet Mail Extensions) is a standard that extends the capabilities of Internet email beyond simple ASCII text. It enables users to exchange various types of data files over the Internet, including images, audio, video, and text in different character encodings. Originally designed for Simple Mail Transfer Protocol (SMTP), MIME has become essential for modern email communication. Virtually all human-written Internet email and a large proportion of automated email is transmitted via SMTP in MIME format. Beyond email, MIME content types are also crucial in other communication protocols like Hypertext Transfer Protocol (HTTP). How MIME Works ...
Read MoreWhat is the POP Protocol in Computer Network?
POP (Post Office Protocol) is a standard email retrieval protocol that allows email clients to download messages from a remote mail server. It provides a mechanism for users who don't maintain permanent internet connections to receive their emails by pulling them from a centralized server. Consider a scenario where user A connects to the Internet using a dial-up connection. When user B sends an email to A while A is offline, the message gets stored in A's mailbox on the ISP's mail server. When A connects later and opens their email client, the client's POP component contacts the ISP's ...
Read MoreWhat is Network Management?
Network management is the procedure of administering, managing, and operating a data network using a network management system. Modern network management systems use software and hardware to constantly collect and analyze data and push out configuration changes for improving performance, reliability, and security. It involves configuring, monitoring, and possibly reconfiguring components in a network with the goal of providing optimal performance, minimum downtime, proper security, accountability, and flexibility. Network management ensures that network resources are used efficiently and that the network meets the organization's requirements. Network Management System Overview ...
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