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Parallel transmission is a method of data communication where multiple data bits are transmitted simultaneously over separate communication channels or wires. Unlike serial transmission, where bits are sent one after another in sequence, parallel transmission sends several bits at the same time, significantly increasing data transfer speed. In parallel transmission systems, each bit of data travels on its own dedicated wire or channel. For example, to transmit an 8-bit byte, eight separate wires are used − one for each bit. This allows all eight bits to be transmitted concurrently rather than sequentially. Parallel Transmission ... Read More
Carrier Sense Multiple Access with Collision Detection (CSMA/CD) is a network protocol for carrier transmission that operates in the Medium Access Control (MAC) layer. It senses or listens whether the shared channel for transmission is busy or not, and defers transmissions until the channel is free. The collision detection technology detects collisions by sensing transmissions from other stations. On detection of a collision, the station stops transmitting, sends a jam signal, and then waits for a random time interval before retransmission. How CSMA/CD Works CSMA/CD Operation Process ... Read More
An IP address (Internet Protocol address) is a numerical identifier, such as 192.0.2.1, that is associated with a computer network that communicates using the Internet Protocol. An IP address serves two primary functions: identifying a host or network interface, and providing location addressing to establish communication paths. IP addresses can be either Public or Private, each serving different networking purposes. Understanding this distinction is crucial for network configuration and security. Public vs Private IP Address Architecture Internet ... Read More
The I Love You virus, also known as the "ILOVEYOU" worm, was one of the most destructive computer viruses in history. Released in May 2000, this virus spread rapidly through email systems worldwide, causing billions of dollars in damage and infecting millions of computers within just a few days. This virus demonstrated the vulnerability of email systems and highlighted the importance of cybersecurity awareness. It was created by Onel de Guzman, a 24-year-old computer science student from the Philippines, and became a landmark case in cybersecurity history. How the I Love You Virus Works The virus spreads ... Read More
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) is a network protocol for carrier transmission that operates in the Medium Access Control (MAC) layer. In contrast to CSMA/CD (Carrier Sense Multiple Access/Collision Detection) that deals with collisions after their occurrence, CSMA/CA prevents collisions prior to their occurrence. CSMA/CA is primarily used in wireless networks where collision detection is difficult or impossible due to the hidden terminal problem and the inability to simultaneously transmit and receive on the same channel. How CSMA/CA Works The algorithm of CSMA/CA follows these steps: When a frame is ready, ... Read More
In computer networks, Gigabit Ethernet (GbE) is the family of Ethernet technologies that achieve theoretical data rates of 1 gigabit per second (1 Gbps). It was introduced in 1999 and represents a significant upgrade from Fast Ethernet's 100 Mbps, providing 10 times faster data transmission speeds. Gigabit Ethernet maintains backward compatibility with existing Ethernet standards while delivering the high-speed connectivity required for modern networks, data centers, and bandwidth-intensive applications. Varieties of Gigabit Ethernet The popular varieties of Gigabit Ethernet are 1000Base-SX, 1000Base-LX, 1000BASE-T, and 1000Base-CX. Each variant uses different physical media and is optimized for specific distance ... Read More
Setting up a wireless internet connection without a router is usually done using an ad-hoc network. This is a peer-to-peer network configuration where devices connect directly to each other without requiring a central access point. Small businesses and home users often establish ad-hoc computer-to-computer networks when they don't have access to a traditional router. What is an Ad-hoc Network An ad-hoc network allows devices with wireless capabilities to connect directly to each other, creating a temporary network without infrastructure. If you have Windows Vista, Windows 7, Windows XP, or newer systems, you can build your own wireless network ... Read More
The process of turning plain text into an encrypted form (cipher text) is known as encryption. Sensitive data is transmitted in an encrypted form so that it can be protected, and a strong encryption mechanism ensures that the data is not misused even if a hacker gets hold of it. Decryption is the reverse mechanism where the encrypted cipher text is converted back into its original form. Understanding the relationship between encryption and decryption is fundamental to modern cybersecurity and data protection. What is Encryption? Encryption is the procedure of encoding data in cryptography. This procedure turns ... Read More
In data communications, cut-through switching is a method of switching data frames or packets where the switching device (bridge or switch) forwards the frames as soon as the destination address is available without waiting for the rest of the data to arrive. Working Principle Cut-through switching is used in packet switching systems. In packet-switching, the message is divided into a number of units called packets that are individually routed from the source to the destination. There is no need to establish a dedicated circuit for communication, since it is a connectionless network switching technique. In cut-through switching, ... Read More
Routers are networking devices operating at layer 3 or a network layer of the OSI model. They are responsible for receiving, analyzing, and forwarding data packets among the connected computer networks. When a data packet arrives, the router inspects the destination address, consults its routing tables to decide the optimal route and then transfers the packet along this route. Router Operating at Network Layer Network A 192.168.1.0/24 ... Read More