Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Computer Network Articles
Page 82 of 122
What is NTP?
Network Time Protocol (NTP) is a TCP/IP protocol designed to synchronize computer clocks across data networks. Developed in the 1980s by D.L. Mills at the University of Delaware, NTP achieves highly accurate time synchronization while managing the effects of variable latency over packet-switched networks through sophisticated timing algorithms. NTP enables distributed computer clocks to synchronize with reference time sources on the Internet. The protocol operates using the User Datagram Protocol (UDP) on port 123, providing efficient and lightweight time synchronization services. NTP Hierarchical Structure ...
Read MoreWhat are the SSL Certificates?
An SSL certificate is a digital certificate that verifies a website's identity and enables an encrypted connection. SSL stands for Secure Sockets Layer, a security protocol that creates an encrypted link between a web server and a web browser. Companies and organizations need to install SSL certificates on their websites to secure online transactions and keep user data private and secure. SSL protects internet connections and prevents criminals from reading or modifying data shared between two systems. SSL works by ensuring that any data shared between users and websites, or between two systems, remains unreadable to unauthorized parties. ...
Read MoreWhat is the difference between Domain Name and URL?
A domain name and a URL are fundamental components of web navigation, but they serve different purposes. Understanding their distinction is crucial for anyone working with websites and web technologies. Domain Name A domain name is a human-readable address that represents an IP address on the internet. It serves as a memorable alternative to numeric IP addresses, making it easier for users to access websites without remembering complex numbers like 192.168.1.1. Domain names consist of multiple parts separated by dots, read from right to left. For example, in www.example.com: .com − Top-level domain (TLD) ...
Read MoreWhat is the difference between SHA1 and SHA256?
Secure Hash Algorithms (SHA) are cryptographic hash functions that convert input data into fixed-length hash values. SHA-1 and SHA-256 are two widely used versions of SHA, with SHA-256 being the more secure and recommended successor to SHA-1. SHA-1 SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function developed by NIST and the NSA in 1995 as an upgrade to the original SHA algorithm from 1993. It was widely adopted as a federal standard and became one of the most commonly used hash functions in SSL certificate authorities and security protocols. SHA-1 processes input data and produces ...
Read MoreWhat is the difference between GSM and UMTS?
Let us begin by understanding the key differences between GSM and UMTS, two fundamental mobile communication technologies that represent different generations of cellular networks. GSM (Global System for Mobile Communications) GSM is a standard developed by the European Telecommunications Standards Institute (ETSI) for second-generation (2G) digital mobile systems. It uses Time Division Multiple Access (TDMA) technology to divide radio frequencies into time slots, allowing multiple users to share the same frequency band. GSM phones are characterized by the Subscriber Identity Module (SIM) card, a removable smart card containing user subscription data and contact information. This SIM card ...
Read MoreWhat is the difference between URL and Link?
Let us begin by understanding what URL is and how it differs from a link. URL URL stands for Uniform Resource Locator. It indicates the complete address of a web resource, specifying its exact location on the internet to access web pages, videos, documents, or other online resources. When you search for content on Google, it displays various URLs that are hyperlinked to relevant web pages matching your query. Anatomy of a URL https:// www.example.com /path/page.html ?query=value Protocol ...
Read MoreWhat is the difference between SONET and DWDM?
Synchronous Optical Network (SONET) and Dense Wavelength Division Multiplexing (DWDM) are two fundamental technologies in optical networking, each serving different but complementary roles in modern telecommunications infrastructure. SONET (Synchronous Optical Network) SONET is a standardized digital communication protocol that transmits large volumes of data over long distances using fiber optic cables. It multiplexes multiple digital data streams simultaneously over optical fiber using LEDs and laser beams at precisely synchronized timing intervals. The key innovation of SONET lies in its frame structure. Unlike traditional packet networks where headers precede payloads, SONET defines headers as overhead that is interspersed ...
Read MoreWhat is ADSL?
ADSL stands for Asymmetric Digital Subscriber Line. It is a type of DSL (Digital Subscriber Line) technology that transmits data over existing copper telephone lines. Unlike Symmetric DSL (SDSL) which provides equal upload and download speeds, ADSL offers different maximum data rates for uploading and downloading data. The term "asymmetric" refers to the unequal bandwidth allocation, with significantly higher speeds for downstream (download) traffic compared to upstream (upload) traffic. This design suits most residential users who typically download more data than they upload. How ADSL Works ADSL uses Frequency Division Multiplexing (FDM) to separate voice and data ...
Read MoreWhat is the difference between SONET and SDH?
Let us understand what Synchronous Optical Networking (SONET) and Synchronous Digital Hierarchy (SDH) are, and explore their key differences. SONET SONET (Synchronous Optical Networking) is a standardized digital communication protocol developed in North America that transmits large volumes of data over long distances using fiber optic medium. SONET uses LEDs and laser beams to simultaneously share multiple digital data streams over optical fiber. SONET provides concurrent data streams and supports efficient telecommunications services. It uses standardized line rates, enabling interconnection between different types of organizations. The network architecture is designed to maintain data transmission even if a ...
Read MoreWhat is the difference between WEP and WPA?
WEP (Wired Equivalent Privacy) and WPA (Wi-Fi Protected Access) are two wireless security protocols that protect Wi-Fi networks from unauthorized access. Understanding their differences is crucial for implementing proper network security. What is WEP? WEP stands for Wired Equivalent Privacy and was the first wireless security protocol introduced in September 1999. It was designed to provide security equivalent to wired networks by encrypting data transmitted over wireless connections. WEP uses static encryption keys of either 64-bit or 128-bit length (with 40-bit and 104-bit effective key lengths respectively). The protocol was initially limited to 64-bit encryption due to ...
Read More