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Computer Engineering Articles
Page 28 of 36
Multiple Access Protocols in Computer Networks
Multiple access protocols are a set of protocols operating in the Medium Access Control sublayer (MAC sublayer) of the Open Systems Interconnection (OSI) model. These protocols allow multiple nodes or users to access a shared network channel efficiently, enabling several data streams originating from different nodes to be transferred through a multi-point transmission medium. The primary objectives of multiple access protocols are optimization of transmission time, minimization of collisions, and avoidance of interference between transmissions. These protocols solve the fundamental problem of how multiple devices can share a single communication channel without data corruption. Categories of Multiple Access ...
Read MoreWhat is Hamming Distance?
Hamming distance is a metric for comparing two binary data strings of equal length. It measures the number of bit positions in which the two bits are different, providing a quantitative way to assess how "close" or "far apart" two binary sequences are. The Hamming distance between two strings a and b is denoted as d(a, b). This distance metric is fundamental in computer networks for error detection and correction, as well as in coding theory for comparing equal-length data words. How It Works To calculate the Hamming distance between two binary strings, we perform an XOR ...
Read MoreDifference between Router and Switch
Both Routers and Switches are network connecting devices that serve different purposes in network infrastructure. Routers work at the network layer and are responsible for finding the shortest path for packets across multiple networks, whereas switches operate at the data link layer to connect various devices within a single network. Understanding the differences between these two critical network devices is essential for anyone working with computer networks, as they perform complementary but distinct functions in data communication. Router vs Switch in Network Architecture ...
Read MoreWhat is ad-hoc network?
An ad hoc network is a spontaneously formed network where devices connect and communicate with each other directly without requiring a central infrastructure. The term "ad hoc" is Latin for "for this, " implying an improvised or temporary arrangement. Ad hoc networks are primarily wireless local area networks (WLANs) where devices communicate peer-to-peer instead of relying on base stations or access points. Each device participates in routing by determining optimal paths using routing algorithms and forwarding data to other devices through these routes. Ad Hoc Network: Direct Device Communication ...
Read MoreIEEE 802.3 and Ethernet
Ethernet is a set of technologies and protocols that are used primarily in LANs. It was first standardized in the 1980s by IEEE 802.3 standard. IEEE 802.3 defines the physical layer and the medium access control (MAC) sub-layer of the data link layer for wired Ethernet networks. Ethernet is classified into two main categories: classic Ethernet and switched Ethernet. Classic Ethernet is the original form providing data rates between 3 to 10 Mbps, commonly referred to as 10BASE-X variants. Switched Ethernet uses switches to connect stations in the LAN, replacing repeaters and allowing full bandwidth utilization. IEEE 802.3 ...
Read MoreMulti-access Channels and Random Access Channels
Multi-access channels are network channels that allow several transmitters to communicate with a common receiver via a shared channel. These channels are also called multiple access (MAC) channels. The network channel may be a single cable or optical fiber connecting multiple nodes, or a portion of the wireless spectrum. In multi-access environments, efficient coordination is essential to prevent data collisions and ensure all users can transmit their information successfully without interference. Random Access Channels Random-access channels (RACH) are shared channels used in wireless communication systems to allow mobile devices for call set-up. RACH also handles bursty data ...
Read MoreMedium Access Control Sublayer (MAC sublayer)
The Medium Access Control (MAC) sublayer is a critical component of the data link layer in the OSI reference model. It manages how devices access and share transmission media, controlling data flow and preventing collisions in shared network environments. The MAC sublayer acts as an intermediary between the upper layers and the physical transmission medium, ensuring orderly and efficient data transmission across networks like Ethernet, Wi-Fi, and other shared media technologies. MAC Layer in the OSI Model The data link layer (Layer 2) of the OSI model is divided into two distinct sublayers: Logical ...
Read MoreNetwork Software
Network software encompasses a broad range of software used for the design, implementation, operation, and monitoring of computer networks. Traditional networks were hardware-based with software embedded directly into the devices. With the advent of Software-Defined Networking (SDN), software is separated from the hardware, making it more adaptable to the ever-changing nature of computer networks. Functions of Network Software Network software performs several critical roles in managing and maintaining a computer network − Network setup and installation − Helps to set up and install computer networks by configuring devices, assigning IP addresses, and establishing connectivity. ...
Read MoreHome Networks
A home network is a small-sized LAN that is used to connect devices within the small area of a home. It facilitates sharing of files, peripheral devices, programs, and Internet access among the computers in a home. Home networks may be wired, i.e., connections within devices are done with cables; or wireless, i.e., connections are provided using Wi-Fi and Bluetooth. Most modern home networks use a combination of both wired and wireless connections. A typical setup involves an Internet Service Provider (ISP) connection coming into a modem, which connects to a wireless router that distributes the network to all ...
Read MoreWide Area Network (WAN)
A Wide Area Network (WAN) is a computer network that covers a large geographical area comprising a region, a country, a continent, or even the whole world. WAN includes the technologies to transmit data, image, audio, and video information over long distances and among different LANs and MANs. The Internet is the largest and most well-known example of a WAN. Organizations use WANs to connect their branch offices, data centers, and cloud services spread across different cities or countries. Distinguishing Features of WAN Large capacity and scalability − WANs connect a large number of computers ...
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