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Articles by Pranav Bhardwaj
Page 12 of 40
What is Layer 2 Forwarding (L2F)?
Layer 2 Forwarding (L2F) is a tunneling protocol developed by Cisco Systems for creating Virtual Private Networks (VPNs) over public networks like the Internet. L2F operates at the data-link layer and tunnels Layer 2 protocols such as Point-to-Point Protocol (PPP) and Serial Line Internet Protocol (SLIP) across IP networks. Unlike IP-dependent protocols, L2F is media-independent and can operate over various network infrastructures including Frame Relay and ATM. The protocol enables server-side capabilities like user authentication via RADIUS, dynamic address allocation, and Quality of Service (QoS) management. How L2F Works L2F creates an end-to-end tunnel between a client ...
Read MorePacket Queuing and Dropping in Routers
Routers are critical networking equipment that control data flow across networks. They contain limited buffer memory for temporarily storing packets before forwarding them to their destinations. When the arrival rate of packets exceeds the rate at which packets can be processed and transmitted, packet queuing and potentially packet dropping occurs. This situation arises because routers must balance finite memory resources with varying traffic loads. Effective queuing disciplines are essential for managing packet flow, minimizing delays, and ensuring fair resource allocation among different traffic types. Router Packet Queuing Process ...
Read MoreWhat is a CDN? (Functions, How does it work, Advantages)
A Content Delivery Network (CDN) is a geographically distributed network of servers that work together to provide fast delivery of Internet content. CDNs cache web content at multiple locations worldwide, bringing data closer to end users to reduce latency and improve performance. CDNs serve various types of content including web pages, images, videos, applications, and downloadable files. Major companies like Netflix, Amazon, and Facebook rely on CDNs to deliver content to millions of users efficiently across the globe. CDN Architecture Origin Server ...
Read MoreWhat is IP Blacklisting? (Challenges, How to Stay off the Blacklist)
IP Blacklisting is a network security mechanism that blocks traffic from specific IP addresses or ranges known to be malicious or unwanted. When an IP address is blacklisted, it is denied access to servers, websites, or email systems to prevent spam, cyberattacks, and other harmful activities. Organizations maintain blacklists containing IP addresses associated with suspicious behavior such as sending spam emails, conducting brute force attacks, or hosting malware. These lists are regularly updated and shared across security platforms. What is an IP Address? An IP address (Internet Protocol address) is a numerical identifier assigned to each device ...
Read MoreWhat is Network Mapping or Nmap?
One of the most common challenges with modern network systems is their inherent complexity. Even a simple home network can be difficult to understand, while enterprise networks with hundreds or thousands of connected devices present exponentially greater complexity. Network Mapper (Nmap) is a powerful, free network discovery and security auditing tool that helps administrators understand their network infrastructure. It scans networks to identify active hosts, open ports, running services, operating systems, and other network characteristics, creating a comprehensive map of network topology and security posture. While Nmap can be misused by malicious actors to identify vulnerabilities, it serves ...
Read MoreWhat are the Essentials of an Effective Cybersecurity Policy?
A security policy is a document outlining how to defend an organization from dangers, such as computer security threats, and address issues when they arise. A security policy must identify all of a company's assets and all potential threats to those assets. Essentials of a Cybersecurity Policy Institutions develop information security policies for several reasons − To create a complete information security plan. To detect and prevent ...
Read MoreWhat is Reverse Engineering Technique in Cybersecurity?
Reverse engineering aka back engineering is a technique for extracting design knowledge from software, equipment, airplanes, architectural structures, and other items. It is the practice of evaluating a piece of software or hardware's functionalities and information flow in order to comprehend its functioning and behavior. In cyber protection, malware is frequently reverse-engineered.Reverse engineering is a technique used in older industries to improve computer hardware and software. The machine code of a program - the string of 0s and 1s transmitted to the logic processor - is the subject of software reverse engineering. To convert the machine code back to the ...
Read MoreWhat is SquirrelWaffle Malware?
SquirrelWaffle, a new malware family, has the potential to be a big commercial disruptor. Once SquirrelWaffle has infiltrated network ecosystems, it can be utilized to cause significant damage. SquirrelWaffle is sometimes used as a delivery system for other malware infections, such as Qakbot and Cobalt Strike. SquirrelWaffle Malware: What Is It? SquirrelWaffle is a new malware loader that spreads via malspam (malicious spam email) with the goal of infecting a device with second-stage malware such as cracked copies of the red teaming tool Cobalt Strike and QakBot, a well-known malware that started out as a simple banking trojan but ...
Read MoreWhat is ProLock Ransomware?
A new ransomware group known as ProLock has created a reputation for itself by getting into large companies and government networks, encrypting files, and demanding massive ransom payments since the beginning of the year. ProLock is the most recent ransomware group to employ a "big-game hunting" strategy in its activities. Big-game hunting refers to pursuing greater prey in order to take significant sums of money from those who can afford it. Attacks from this category are most likely to be seen by system administrators who handle these larger networks. How Does ProLock Ransomware Work? ProLock ransomware encrypts files ...
Read MoreWhat is Domain Fronting?
What is a Content Delivery Network (CDN)? Static web pages were the most common type of material on the early Internet. The site now consists of millions of dynamic web pages, user-generated content (UGC), stylesheets, images, JavaScript files, movies, and, of course, streaming multimedia. Every website resides on a server, and the distance between the server and the user determines how quickly a website loads. The webpage loads faster when the server and the user are closer together and vice versa. Take, for example, Yelp's (crowdsourced company reviews) or Whole Foods' websites (multinational supermarket chain). Although both are accessible from ...
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