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Tech Tutorials | App Reviews & Android Fixes | Fintech Shield Blog
Welcome to the Fintech Shield Blog | Your go-to hub for insightful Tech Tutorials, Unbiased App Reviews, Android Solutions, Windows Solutions and Digital innovation tips. Whether you're a curious user or a seasoned tech pro, we’ve got something valuable for you. Stay ahead in the digital era with our expert-driven guides and updates.
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What Is a Dynamic IP Address? Everything You Need to Know
Wondering why your IP keeps changing? This beginner’s guide explains what dynamic IP addresses are, how they work, and why most ISPs use them.
Kalyan Bhattacharjee
Jul 104 min read


How to Reset Network Settings in Windows | CMD & GUI Steps
Resetting your network settings can fix most internet problems on Windows. This step-by-step guide shows how to do it using CMD and the built-in GUI, making your connection smooth again in 2025.
Kalyan Bhattacharjee
Jun 232 min read


Bus Topology in Networking: Simple Yet Foundational
Learn what Bus Topology is, how it works, its pros & cons, and where it's still used today in this beginner-friendly networking guide.
Kalyan Bhattacharjee
Apr 163 min read


ncpa.cpl Command: What It Is and How to Use It
Learn what the ncpa.cpl command is, how to use it in Windows, and quickly manage your network connections with this simple shortcut!
Kalyan Bhattacharjee
Apr 72 min read


Star Topology Diagram: Structure, Functionality & Benefits
Star topology is a network setup where devices connect to a central hub or switch, ensuring easy management and high reliability.
Kalyan Bhattacharjee
Apr 23 min read


Network Security Key | What It Is and Why It Matters (2025 Guide)
A Network Security Key is more than just a Wi-Fi password. It's your first line of defense against unauthorized access to your private network. In this blog, we explore what a network security key is, the different types (WEP, WPA, WPA2/WPA3), and why understanding it is crucial for protecting your digital footprint. Whether you're a home user or managing a business network, knowing how this key works can help you secure your data and prevent cyber threats.
Kalyan Bhattacharjee
Aug 26, 20245 min read


What is a Subnet Mask? The Key to Efficient Networking
A subnet mask is a crucial component in IP networking that helps divide large networks into smaller, more manageable sub-networks or subnets. It works by identifying which portion of an IP address refers to the network and which part refers to the host. By using subnet masks, organizations can improve network performance, enhance security, and efficiently allocate IP addresses.
Kalyan Bhattacharjee
Aug 22, 20245 min read


Hybrid Topology | Network Solution for Modern Businesses
Hybrid topology blends star, bus & ring networks offering flexibility, scalability & reliability for modern business needs.
Kalyan Bhattacharjee
Apr 7, 20243 min read


DHCP vs Static IP | Choosing the Right Network Configuration
When setting up a network, choosing between DHCP and Static IP addresses can significantly impact performance, security, and management. DHCP offers dynamic, automatic IP assignment—ideal for convenience and scalability—while Static IP provides consistent addressing, often preferred for servers and critical devices. In this blog, we break down the differences, pros, and cons of each configuration to help you make the right choice for your network.
Kalyan Bhattacharjee
Apr 1, 20243 min read


Network Security - A Deep Dive into Firewall Authentication
Explore the critical role of firewall authentication in network security, and learn how step-by-step implementation safeguards systems, controls access, and protects sensitive data from cyber threats.
Kalyan Bhattacharjee
Mar 22, 20243 min read


DHCP Lookup Failed: Understanding the Issue and Solutions
Facing a "DHCP Lookup Failed" error? Learn what it means, why it happens, and how to fix it for a seamless internet connection!
Kalyan Bhattacharjee
Mar 20, 20243 min read


NAT Explained: Simplifying Network Address Translation
Network Address Translation (NAT) is the silent workhorse of modern networking, enabling private devices to communicate with the wider internet securely and efficiently. From conserving IPv4 addresses to enhancing security, NAT plays a vital role in keeping networks smooth, scalable, and connected.
Kalyan Bhattacharjee
Jun 23, 20233 min read


IPv4 vs IPv6: Key Differences Explained | Evolution of Internet Protocol
IPv4 and IPv6 are the backbone of internet communication, but they differ in address formats, scalability, and efficiency. This blog explores how IPv6 improves upon IPv4, ensuring faster connectivity, enhanced security, and support for the ever-growing number of devices in the digital age.
Kalyan Bhattacharjee
Jun 4, 20233 min read


IP Address: The Backbone of Internet Communication
An IP address is the cornerstone of internet communication, serving as a unique identifier for every device connected to a network. Whether it's browsing websites, sending emails, or streaming content, IP addresses ensure that data finds its correct destination. In this blog, we break down what IP addresses are, how they work, and why they are vital for seamless online connectivity.
Kalyan Bhattacharjee
May 23, 20234 min read


Network Topology in Computer Networks | Complete Guide (2025)
Network topology forms the foundation of modern connectivity, defining how devices and nodes are arranged and interact within a network. From star and mesh to bus and ring configurations, each topology offers unique advantages in terms of speed, reliability, and scalability. In this blog, we break down the most common network topologies and explain how they shape the efficiency and performance of today’s digital infrastructure.
Kalyan Bhattacharjee
May 15, 20234 min read


DNS Explained | How It Works and Why Security Matters in 2025
The Domain Name System (DNS) is often called the "phonebook of the internet," translating user-friendly domain names into machine-readable IP addresses. While it plays a critical role in internet navigation, DNS is also a common target for cyber threats like spoofing and cache poisoning. This blog offers a brief yet insightful overview of how DNS works and explores essential security measures to protect it from exploitation.
Kalyan Bhattacharjee
Apr 9, 20234 min read
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