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Computer Network Articles
Page 101 of 122
SFTP File Transfer Protocol
In the world of cyberattacks, organizations need a trustworthy solution for secure file transfers. The Secure File Transfer Protocol (SFTP) was developed to provide strong protection against hackers by leveraging the SSH (Secure Shell) protocol. SFTP helps prevent man-in-the-middle attacks and ensures file integrity through authentication and encryption, making passwords invisible to potential attackers. What is SFTP? SFTP is a network protocol that provides secure file access, management, and transfer capabilities. It operates over SSH connections using port 22 by default, combining the reliability of file transfer protocols with the security features of SSH encryption. ...
Read MoreRisk Associated with public Wi-Fi
Public Wi-Fi networks provide convenient internet access in airports, restaurants, libraries, and other public spaces. However, these open networks pose significant security risks that users must understand to protect their devices and personal data from cyber attacks. While modern public Wi-Fi has implemented some security measures, it remains inherently less secure than private networks due to its shared nature and open access model. Public Wi-Fi Security Risks Your Device (Vulnerable) Public Wi-Fi (Unsecured) ...
Read MoreDifference between Client-side filter and Server-side filters in Cyber Security
Filtering is the process of validating or screening input data to determine whether it meets predefined standards or security policies. In cybersecurity, content filtering serves as a critical defense mechanism that screens emails, web pages, and other digital content to block malicious, inappropriate, or policy-violating materials. Modern firewalls incorporate filtering as built-in features, operating through predefined patterns that analyze text strings, image data, and network traffic. Organizations deploy content filtering to block malicious websites, prevent access to unauthorized social media platforms, and protect against various cyber threats according to their security policies. Client-side vs ...
Read MoreRPC Message Protocol
Remote Procedure Call (RPC) Message Protocol is a high-level communication protocol that enables a client to execute procedures on a remote server as if they were local function calls. RPC abstracts the complexity of network communication, allowing distributed applications to interact seamlessly across different systems. Unlike low-level protocols such as TCP/IP or UDP that handle basic data transport, RPC provides a more intuitive programming interface. When a client makes an RPC request, it can receive responses from multiple remote systems, making it ideal for distributed computing environments. RPC Message Protocol Flow ...
Read MoreDifference between Bridge and Repeater
Bridges and repeaters are fundamental networking devices used to extend network range, but they operate at different layers and serve distinct purposes. A bridge connects multiple LANs to create a larger network while performing intelligent traffic filtering, whereas a repeater simply amplifies and regenerates signals to overcome distance limitations. Bridge vs Repeater Operation BRIDGE Data Link Layer (Layer 2) LAN A LAN B ...
Read MoreGoogle Cloud Database Services
Google Cloud provides comprehensive database services designed to store data securely and globally across different deployment models. These services support various database types including relational, NoSQL, and in-memory databases, offering organizations flexible options for their data storage and management needs. Google Cloud database services support three main distribution types: hybrid data distribution, regional data distribution, and multi-cloud distribution, each tailored to specific organizational requirements and compliance needs. Database Deployment Models Google Cloud supports three primary deployment strategies: Single Cloud Deployment The simplest deployment model that migrates on-premise database infrastructure entirely to Google Cloud services. This ...
Read MoreSMTP Responses
The Simple Mail Transfer Protocol (SMTP) is an application layer protocol that enables email communication between mail servers. SMTP operates on a request-response model where the client sends commands and the server responds with standardized three-digit status codes accompanied by descriptive text messages. SMTP Communication Model SMTP communication follows a structured approach where the client initiates requests and the server provides responses. Each server response contains a three-digit numeric code that indicates the status of the requested operation, making it easy for clients to programmatically handle different scenarios. SMTP Request-Response Model ...
Read MoreRJ11 Color Code
The RJ11 connector is a standardized telephone interface used primarily for connecting telephone lines, modems, and fax machines to telecommunication networks. Part of the Registered Jack family, RJ11 uses a compact 6-position connector with typically 2 or 4 active contacts for voice and data transmission. RJ11 connectors are most commonly found in Plain Old Telephone Service (POTS) applications, where they connect residential and business telephone equipment to Internet Service Providers and telephone exchanges. The connector's small form factor and reliable connection make it ideal for home and office environments. RJ11 Physical Structure An RJ11 connector features a ...
Read MoreLongest Job First (LJF) CPU Scheduling Algorithm
Longest Job First (LJF) is a CPU scheduling algorithm that prioritizes processes based on their burst time. In LJF, the processes with the largest burst time are given priority over the shorter ones. This algorithm works on a non-preemptive basis, meaning once a process is started, it will continue to run until it completes, and no other process can preempt it. To implement the LJF algorithm, processes are sorted in the ready queue based on their burst times in descending order. The process with the largest burst time among all the processes that have arrived until that time is ...
Read MoreAll about I love you Virus
The I Love You virus, also known as the "ILOVEYOU" worm, was one of the most destructive computer viruses in history. Released in May 2000, this virus spread rapidly through email systems worldwide, causing billions of dollars in damage and infecting millions of computers within just a few days. This virus demonstrated the vulnerability of email systems and highlighted the importance of cybersecurity awareness. It was created by Onel de Guzman, a 24-year-old computer science student from the Philippines, and became a landmark case in cybersecurity history. How the I Love You Virus Works The virus spreads ...
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