Welcome to the Networking Fundamentals Interview Questions & Answers – Complete Series on CloudNet0365. Whether you are starting your networking career, preparing for your first IT support interview, strengthening your system administration skills, or building a foundation for CCNA and advanced networking, this series will help you understand essential networking concepts step by step. Computer … Read more

Layer 2 redundancy is essential in enterprise networks, but redundant Ethernet paths can create Layer 2 loops. A Layer 2 loop can cause broadcast storms, duplicate frames, MAC-address instability and severe network disruption. Spanning Tree Protocol (STP) was designed to allow redundant physical paths while logically preventing Layer 2 forwarding loops. In this final Networking … Read more

Ethernet switching is one of the most important foundations for Network Engineers and System Administrators. A switch operates primarily at Layer 2 and uses MAC addresses to make forwarding decisions. VLANs then allow a physical switch infrastructure to be logically divided into separate Layer 2 networks. In this article, we will cover: Ethernet switching MAC … Read more

Understanding IP addressing is only the beginning of networking. Once a packet reaches its destination network, applications still need protocols to communicate. This part covers the major protocols and services that every Network Engineer and System Administrator should understand: TCP UDP Ports Sockets TCP three-way handshake TCP connection termination TCP retransmission Flow and congestion control … Read more

IP addressing is one of the most fundamental concepts in networking. Every network engineer and senior system administrator should understand how IPv4 and IPv6 addresses identify network interfaces, how hosts determine whether a destination is local or remote, and how subnet masks and prefixes define network boundaries. This article establishes the IP addressing foundation that … Read more

In Part 1, we established the basic networking concepts and devices. In Part 2, we examined how traffic moves between hosts, including ARP, default gateways, switches, routers, encapsulation and packet flow. This part focuses on the technology that actually carries Ethernet traffic across a LAN. You will learn: Ethernet fundamentals Copper and fiber media Ethernet … Read more

In Part 1, we covered the basic building blocks of networking, including network devices, OSI and TCP/IP models, MAC addresses, IP addresses, frames, packets, bandwidth, latency and basic network terminology. In this part, we will focus on a much more important practical question: What actually happens when one computer communicates with another computer? Understanding this … Read more

Networking is one of the most important areas for System Administrators, Network Administrators, System Engineers, Network Engineers and IT Infrastructure professionals. Before moving into CCNA, CCNP and CCIE-level networking, it is important to understand how computers communicate, how network devices operate, how data moves through a network, and how the OSI and TCP/IP models describe … Read more