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Computer Network Articles
Page 100 of 122
Domain Name System (DNS) Zones
The Domain Name System (DNS) Zones are partitions of the DNS namespace that enable distributed administration of domain names. A DNS zone represents a portion of the DNS tree structure that is managed by a specific administrator or organization, allowing for decentralized control over different parts of the global DNS infrastructure. DNS zones solve the scalability problem that would arise if the entire DNS system were managed by a single authority. By dividing the DNS namespace into manageable zones, administrative responsibilities are distributed, and the workload on individual nameservers is reduced. Multiple zones can exist on the same physical ...
Read MoreError Detection Code-Checksum
In networking systems, data transmission faces challenges from interference, noise, and other disturbances that can corrupt transmitted signals. This corruption can lead to significant problems like data misinterpretation and communication failures. To ensure data reliability, error detection codes like CRC (Cyclic Redundancy Check) and Checksum are employed. Error detection codes are added to data packet headers, allowing both sender and receiver to perform calculations that verify data integrity. Among these techniques, checksum stands out as one of the most widely used methods due to its simplicity and effectiveness. How Checksum Works A checksum is a computed value ...
Read MoreDifference between IGRP and EIGRP
The distance-vector routing protocols IGRP (Interior Gateway Routing Protocol) and EIGRP (Enhanced Interior Gateway Routing Protocol) are both proprietary Cisco protocols used in enterprise networks. While IGRP was widely deployed in the 1980s and 1990s, EIGRP serves as its modern successor with significant improvements in performance and functionality. Understanding the differences between these protocols is essential for network engineers working with Cisco infrastructure, as EIGRP has largely replaced IGRP in contemporary network deployments. What is IGRP? Interior Gateway Routing Protocol (IGRP) is a distance-vector routing protocol developed by Cisco Systems in the 1980s. It was designed to ...
Read MoreDifference between SFTP and SCP
The file transfer protocols SFTP and SCP are used to safely send files between computers over a network. While these protocols provide comparable functions, there are some key differences between them. SCP (Secure Copy) is a simple file transfer protocol that is commonly seen on UNIX systems. SFTP (SSH File Transfer Protocol) is a more advanced SSH-based file transfer protocol that offers additional features for remote file management. SFTP vs SCP — Secure File Transfer Protocols SFTP • Interactive file management • ...
Read MoreDifference between SLIP and PPP
SLIP (Serial Line Internet Protocol) and PPP (Point-to-Point Protocol) are both data link layer protocols used for serial communication between computers and network devices. While they serve similar purposes in establishing point-to-point connections, they differ significantly in features, security, and reliability. SLIP is a simple protocol designed for basic IP packet encapsulation over serial lines, whereas PPP is a more sophisticated protocol offering advanced features like error detection, authentication, and support for multiple network protocols. What is SLIP? Serial Line Internet Protocol (SLIP) is a basic protocol for encapsulating Internet Protocol (IP) packets over serial communication lines. ...
Read MoreClassification of MAC Protocols
In OSI layers, the Data Link Layer is crucial for reliable data transmission. This layer contains the Medium Access Control (MAC) sublayer, which manages how multiple devices access a shared communication medium without causing data collisions. The MAC layer controls access to shared network resources and ensures that when multiple nodes want to transmit data simultaneously, they do so in an organized manner that minimizes conflicts and maximizes network efficiency. MAC Layer in OSI Model Context Network Layer Data Link Layer (includes ...
Read MoreFiber Optics and its Types
Fiber optics is a technology that transmits data through thin glass or plastic fibers using light signals. It is widely used in communication channels such as telephone networks, television systems, and the Internet. The technology works by converting electrical signals into light at the input side and then converting them back to electrical signals at the output side. Fiber optic cables consist of three main components: a core that carries light signals, cladding that reflects light back to the core preventing signal loss, and a protective coating that shields the cable from environmental damage. Structure of Fiber Optic ...
Read MoreEfficiency of CSMA/CD
CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is a medium access control protocol standardized as IEEE 802.3, widely used in Ethernet networks. It allows multiple stations to share a broadcast medium by sensing the channel before transmission and detecting collisions when they occur. The efficiency of CSMA/CD is crucial in determining its suitability for different network environments and directly impacts overall network performance. How CSMA/CD Works CSMA/CD operates using a simple but effective mechanism: Carrier Sensing − Stations listen to the channel before transmitting to check if it's idle Multiple Access − ...
Read MoreEncryption, its Algorithms and its Future
Encryption is a method to protect data by transforming plain text into an encoded format called cipher text. The main purpose of encryption is to secure data transmission and storage from unauthorized access and attacks. There are two primary types of encryption: symmetric encryption (using a single shared key) and asymmetric encryption (using a pair of public and private keys). Encryption Process Plain Text "Hello World" Encryption Algorithm + Key Cipher Text ...
Read MoreDifference between BSS and ESS
BSS and ESS are fundamental terms in wireless networking that describe different types of wireless network architectures. A Basic Service Set (BSS) is a wireless network consisting of a single access point and all devices within its range, while an Extended Service Set (ESS) is a larger network comprising multiple interconnected BSSs that enable seamless roaming and extended coverage. BSS vs ESS Architecture BSS (Basic Service Set) AP ...
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