Mujtaba Khattak
Mujtaba Khattak is a network solutions architect specializing in SD-WAN, cloud infrastructure, and network optimization. He holds a BS in Artificial Intelligence from SZABIST, an MBA from Virtual University (VU), and Cisco certifications (CCNA and CCNP). As the founder of NetworkUstad.com, Mujtaba authors technical guides and tutorials on networking, cybersecurity, and AI applications, with over 160 published posts. He bridges AI innovation with practical networking solutions to empower IT professionals and enthusiasts.
Master Cisco Borderless Networks (Updated 2025)
Cisco Borderless Networks enable secure, seamless connectivity for any user, device, or location, integrating wired and wireless access with advanced policy and performance management. Designed to address IT challenges like mobility, security, and scalability, this architecture leverages Cisco Catalyst switches, ISR routers, and tools like Cisco DNA Center. For CCNA and CCNP students, understanding Borderless...
Master File Transfer Protocol (FTP) Secure Your FTP Protocol Today (Updadted 2025)
This guide is tailored for network administrators and students using Windows (e.g., versions 10 or 11) and Linux (e.g., Ubuntu 22.04 or CentOS 7) operating systems. FTP operations can be performed using the built-in ftp command on both platforms, accessible via the Command Prompt (cmd) on Windows or the terminal (Ctrl + Alt + T)...
Master HTTP and HTML and Boost Your Skills With Our 2025 Exclusive Guide
HTTP is an abbreviation for HyperText Transfer Protocol, whereas HTML stands for HyperText Markup Language. Learn About HTTP and HTML are the application-layer protocol that governs data exchange between web servers and clients, while HTML is the markup language used to structure and present content on web pages. HTTP facilitates transmission, whereas HTML defines the...
Master Client-Server and Peer-to-Peer and Boost Your Skills (Updated 2025)
Client-server and Peer-to-Peer terms are often used in computer networks. Both are network models that we use in our day-to-day lives. The Client-Server model focuses on information sharing, whereas the Peer-to-Peer network model focuses on connectivity to remote computers. The detailed explanation of both models is the following:- Client-Server Network Model In the client-server model,...
Master Application Layer and Boost Your Skills With this Exclusive Guide (Updated 2025)
This guide applies to Windows (e.g., 10/11) and Linux (e.g., Ubuntu 22.04). Configure application layer services via Command Prompt (cmd) on Windows or terminal (Ctrl + Alt + T) on Linux, as of 2025. It is the topmost OSI Model layer, consolidating the OSI’s application, presentation, and session layers into the TCP/IP model’s single application...
Master User Datagram Protocol (UDP) With Our Exclusive 2025 Guide
The User Datagram Protocol (UDP) is a lightweight communication protocol optimized for low-latency, loss-tolerant data transmission, ideal for Internet applications. Paired with IP (UDP/IP), it sends datagrams—small data packets—alongside TCP, serving CCNA/CCNP learners in 2025 network design. User Datagram Protocol (UDP) Low Overhead vs Reliability UDP provides basic transport layer functions with lower bandwidth overhead...
Mastering Host Address, Network Prefix, Network ID, and Broadcast ID in 2025
This article, “Mastering Prefix, Network ID, Broadcast ID, and Host Address” is the continuation of my previous articles about the IP address, which are the following: IP address Classes- Exclusive Explanation Positional Number System and Examples (Updated 2025) Network and Host Portion of IPv4 Address So, you need to study the above article to understand...
Positional Number System and Examples (Updated 2025)
In a positional number system, each symbol represents a different value depending on the position it occupies in a number, and each system has a value that relates to the number directly next to it. The total value of a positional number is the total of the resultant value of all positions. The decimal number...
Cisco IOS Command Modes Explained: User EXEC, Privileged EXEC, and Global Configuration Modes
Cisco IOS devices use hierarchical command modes to control access and prevent accidental misconfigurations. Whether you’re managing a router, switch, or preparing for the CCNA exam, understanding these modes is fundamental: Global configuration mode contains a number of sub-configuration modes (also called specific or extended configuration modes). The table below lists common configuration modes and...
How to Connect and Access a Cisco Router: The Ultimate 2025 Guide for CCNA Students
Connecting to a Cisco router is the first step toward mastering network configuration, a critical skill for CCNA students and aspiring network engineers. Understanding physical console access and remote SSH management is essential, whether setting up a home lab or troubleshooting enterprise networks. In 2025, mastering Cisco router connections is vital for CCNA certification and...