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Articles by Satish Kumar
Page 15 of 94
Ethernet Frame Format
Ethernet is a widely used local area networking technology that enables devices to communicate with each other. Ethernet frames are the basic units of data that are transmitted over Ethernet networks. In this article, we will explore the Ethernet frame format in detail, including the various fields that make up the frame and the purpose of each field. Introduction to Ethernet Frames An Ethernet frame is a packet of data that is transmitted over an Ethernet network. The frame is composed of a header, a payload, and a trailer. The header and trailer contain information about the frame, ...
Read MoreEthernet Transmitter Algorithm
The Ethernet Transmitter Algorithm is a comprehensive set of protocols and mechanisms that govern how data packets are transmitted over Ethernet networks. This algorithm ensures efficient data transmission while minimizing packet loss and maximizing network performance across local area networks (LANs). The algorithm encompasses multiple components working together to manage carrier sensing, collision detection, frame formatting, flow control, and quality of service. Understanding these mechanisms is essential for network administrators optimizing Ethernet network performance. Carrier Sense Multiple Access with Collision Detection (CSMA/CD) CSMA/CD is the fundamental access control mechanism in traditional Ethernet networks. Before transmitting, devices must ...
Read Moreifconfig vs ip What\'s Difference and Comparing Network Configuration?
As network administrators or anyone working with network troubleshooting, you will often encounter the commands ifconfig and ip. Both these commands are used in Unix-based operating systems for network interface configuration, but they have significant differences in capabilities, syntax, and maintenance status. Introduction to Ifconfig Ifconfig (Interface Configuration) is a system administration utility in Unix and Unix-like operating systems to configure, control, and query TCP/IP network interface parameters. It is part of the net-tools package which has been present since the early days of Linux. Let's examine a basic ifconfig command: $ ifconfig ...
Read MoreBerkeley's Algorithm
Berkeley's Algorithm is a distributed algorithm for computing the correct time in a network of computers. The algorithm is designed to work in a network where clocks may be running at slightly different rates, and some computers may experience intermittent communication failures. The basic idea behind Berkeley's Algorithm is that each computer in the network periodically sends its local time to a designated master computer, which then computes the correct time for the network based on the received timestamps. The master computer then sends the correct time back to all the computers in the network, and each computer adjusts ...
Read MoreBifid Cipher in Cryptography
The Bifid Cipher is a polygraphic substitution cipher invented by French amateur cryptographer Felix Delastelle in the late 19th century. Unlike monoalphabetic ciphers such as the Caesar Cipher, it encrypts pairs of letters at a time, making it significantly more secure. The cipher is based on a Polybius square, a 5×5 grid containing the alphabet (usually combining I and J into one cell). The grid is typically filled using a keyword first, followed by the remaining letters of the alphabet in order. Polybius Square with Keyword "CRYPTO" ...
Read MoreBinary Synchronous Communication (BISYNC)
Binary Synchronous Communication (BISYNC) is a character-oriented communication protocol developed by IBM that uses synchronous transmission to transfer data between devices. In BISYNC, data is transmitted in structured blocks called frames, which include control characters for synchronization and error detection. BISYNC was designed to provide reliable data communication by using a complex set of control characters to manage data flow and maintain synchronization between sender and receiver. The protocol uses either EBCDIC or ASCII encoding for character representation and was commonly used with 3270 terminals for mainframe communication. BISYNC Frame Structure ...
Read MoreBirman Schiper Stephenson Protocol
The Birman-Schiper-Stephenson (BSS) Protocol is a distributed computing protocol designed to maintain consistent shared state across a group of computers despite potential failures. First described by Michael Birman, Roger Schiper, and Tom Stephenson in 1985, this protocol provides a robust foundation for distributed systems requiring fault tolerance and consistency guarantees. In the BSS Protocol, each computer acts as a replica maintaining a copy of the shared state. The replicas communicate through message passing operations, coordinated by a circulating token that serves as a marker for the current state. This token-based approach ensures orderly state updates and maintains consistency across ...
Read MoreBootstrap Protocol (BOOTP)
The Bootstrap Protocol (BOOTP) is a legacy computer networking protocol used to automatically assign IP addresses to devices on a network. BOOTP was developed in the 1980s as a way to assign IP addresses to diskless workstations without the need for manual configuration. BOOTP operates by allowing a device to broadcast a request for an IP address on the network. The BOOTP server, which is typically a router or a dedicated server, receives the request and assigns a static IP address to the device based on its MAC address. The device then uses the assigned IP address to communicate ...
Read MorePost Office Protocol, Version 3 (POP3)
Post Office Protocol version 3 (POP3) is a standard email protocol used by email clients to retrieve messages from a mail server. It operates as a simple, text-based protocol that downloads emails from the server to the client device for local storage and management. POP3 follows a straightforward client-server model where the email client connects to the server, authenticates the user, downloads available messages, and then typically deletes them from the server. This makes it ideal for single-device email access scenarios. How POP3 Works POP3 operates through a series of commands exchanged between the email client and ...
Read MoreBreaking Cryptography
Breaking cryptography refers to the process of attempting to decrypt encrypted data without authorized access to the secret key. This involves exploiting weaknesses in cryptographic algorithms, implementations, or systems to recover plaintext from ciphertext. Cryptanalysis encompasses various attack methods, each targeting different aspects of cryptographic systems. Understanding these techniques is crucial for both security professionals and system administrators to implement robust encryption practices. Common Cryptographic Attack Methods Brute Force Attack − Systematically trying all possible secret keys until the correct one is found. The effectiveness depends on key length and computational resources. Ciphertext-Only ...
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