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Articles by Pranav Bhardwaj
Page 6 of 40
What is a Shielded Twisted Pair (STP) cable?
A Shielded Twisted Pair (STP) cable is a type of network cable that includes two independent wires wrapped in a protective foil or braided metal shielding. Originally developed by IBM for token ring networks, STP cables prevent electromagnetic interference and enable faster, more reliable data transmission. The key distinguishing feature of STP cables is their additional protective layer that surrounds the twisted wire pairs, providing superior electromagnetic interference (EMI) protection compared to unshielded twisted pair (UTP) cables. STP Cable Structure Outer Jacket ...
Read MoreAlias/Secondary IP Address
IP aliasing is the process of assigning multiple IP addresses to a single network interface. This technique allows one physical network adapter to handle traffic for several different IP addresses, each potentially serving different purposes or applications. Multiple network addresses can be configured on a single physical interface using IP aliasing. One common use case is to make a single computer appear as multiple systems on the network, enabling better resource utilization and service separation. IP Aliasing on Single Interface eth0 Interface 192.168.1.10 192.168.1.11 (eth0:1) ...
Read MoreWhat is AAA (Authentication, Authorization, and Accounting)?
Authentication, Authorization, and Accounting (AAA) is a comprehensive security framework that controls access to computer resources, enforces policies, and tracks user activities. This three-step process ensures that only authorized users can access network resources while maintaining detailed logs of their activities. AAA is commonly implemented with network protocols like RADIUS (Remote Authentication Dial-In User Service) and is typically deployed as a dedicated server to centrally manage network security policies across an organization. AAA Framework Process Flow Authentication Who are you? Authorization ...
Read MoreDynamic Domain Name System (DDNS) in Application Layer
The Dynamic Domain Name System (DDNS) is a protocol that provides DNS extensions allowing DNS servers to accept requests to dynamically add, update, and delete entries in the DNS database. Unlike traditional DNS, DDNS automatically updates DNS records when IP addresses change, making it essential for networks with dynamic IP addressing. Dynamic DNS was created to address the problem of frequent IP changes. When an ISP assigns dynamic IP addresses from a pool, the same domain may receive different IP addresses over time. DDNS automatically refreshes the DNS database to maintain accurate domain-to-IP mappings. How DDNS Works ...
Read MoreDifference between Amazon S3 and Mediafire
Amazon S3 (Simple Storage Service) and MediaFire are two distinct cloud storage solutions designed for different use cases. Amazon S3 targets enterprise applications and developers, while MediaFire focuses on personal file storage and sharing for individual users. Amazon S3 Amazon Simple Storage Service (Amazon S3) is a scalable, enterprise-grade cloud storage service launched by AWS in March 2006. It provides object-based storage designed for web-scale computing and commercial applications. Target use cases − Data lakes, website hosting, mobile applications, enterprise applications, IoT devices, and big data analytics Storage capacity − Virtually unlimited storage ...
Read MoreWhat is Digital Service Unit (DSU)?
A Digital Service Unit (DSU) is a hardware device that connects a Local Area Network (LAN) to an external digital communication carrier service. The DSU works in conjunction with a Channel Service Unit (CSU) to provide the interface between customer premises equipment and the telecommunications provider's digital network. The DSU serves as a critical component in WAN connectivity, converting digital signals between different formats and providing necessary timing and control functions for reliable data transmission over long distances. How DSU Works A DSU typically features multiple ports including a WAN port (connecting to the digital circuit) and ...
Read MoreDifference between Dropbox and Backblaze B2
Dropbox is a cloud storage and file synchronization service that allows users to store, sync, and share files across multiple devices and platforms. Founded in 2007 by MIT students Drew Houston and Arash Ferdowsi, Dropbox has become one of the most popular cloud storage solutions for both personal and business use. Dropbox operates on a freemium model, offering 2 GB of free storage that can be expanded through referrals and paid plans. The service is designed with user-friendly interfaces and seamless synchronization capabilities across Windows, macOS, iOS, Android, and web browsers. Dropbox Features Storage Options ...
Read MoreWhat is Winternitz One Time Signature Scheme?
The Winternitz One-Time Signature (W-OTS) scheme is a quantum-resistant digital signature algorithm proposed by Robert Winternitz. It is considered post-quantum secure because it relies on the security of cryptographic hash functions rather than mathematical problems that quantum computers can solve efficiently. W-OTS uses a parameter W to determine the trade-off between signature size and computation time. The most common implementation uses W = 256, which provides a good balance between security and efficiency. Winternitz One-Time Signature Scheme Private Key 32 random values ...
Read MoreCapacity of a channel in Computer Networks
The capacity of a channel in computer networks refers to the maximum amount of data that can be transmitted through a communication medium. It is a fundamental concept in network design and performance analysis, determining the theoretical upper limit of data throughput for any given channel. Channel capacity analysis helps network engineers evaluate system performance, identify bottlenecks, and optimize network infrastructure. Whether dealing with fiber-optic cables, wireless connections, or wide area networks (WANs), understanding capacity limitations is crucial for effective network planning. Types of Communication Channels Communication channels are classified based on their directional capabilities: ...
Read MoreDifference between Cloud Computing and Virtualization
Cloud Computing and Virtualization are two fundamental technologies that revolutionized modern IT infrastructure, yet they serve different purposes and operate at different scales. Understanding their distinctions is crucial for making informed technology decisions. What is Virtualization? Virtualization is a technology that creates software-based replicas of physical hardware resources, allowing multiple virtual environments to run on a single physical machine. It uses a thin software layer called a hypervisor to manage and allocate hardware resources among virtual machines (VMs). Each VM operates as an independent computer with its own operating system, applications, and allocated resources, while sharing the ...
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