March 29, 2026/
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OSPF Passive Interface Why do we need an OSPF passive interface? A router often does not need to form neighbor relationships...
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Cisco ACI Data Center Architecture Cisco ACI (Application Centric Infrastructure) is a comprehensive SDN (Software-Defined Networking) solution that provides an integrated architecture for managing...
Network Troubleshooting Commands As a Windows administrator, it’s important to be familiar with the various networking commands which can be used for network troubleshooting. Networking commands are...
Network Engineer Roadmap What is a Network Engineer What is a Network Engineer A Network Engineer is an IT professional who designs, builds, manages, and maintains computer networks so that devices...
Router, Switch, and Firewall Differences Between Router and Firewall What is a Router A router is a networking device used to help route traffic from source to destination. Routers have an upstream...
Network Protocols & Port No History of Network Protocols 1. Early Communication Systems (1960s) The history of network protocols began in the 1960s when computers started communicating with each...
DNS Server History Of DNS The Domain Name System (DNS) is a fundamental technology of the internet that translates human-readable domain names into IP addresses. Its development happened over several...
Network Topology Network Topology 1. Bus Topology In Bus Topology, all computers and network devices are connected to a single main cable called a backbone cable. Data travels through this main cable...
PoE Technology History of POE Technology 1. Early Stage (Before 2000)Before PoE technology was introduced, network devices required two separate connections: one for data (Ethernet cable) and another...
DHCP Server DHCP (Dynamic Host Configuration Protocol) is a network protocol used to automatically assign IP addresses and other network settings to devices in a network. It helps computers, phones...
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March 24, 2026/
GRE & DM-VPN History of DM-VPN The history of DMVPN (Dynamic Multipoint VPN) is closely tied to the evolution of...
March 21, 2026/
Ethernet Connector RJ45 Connector What is “RJ45” Do you know the meaning of “RJ45”? Let me explain it. “RJ” is the...
March 21, 2026/
Transmission Media Transmission Media in Computer Network Introduction The modern global environment is constantly evolving. Data Communication and networking technologies...
March 20, 2026/
Policy Based Routing MikroTik ECMP Recursive Load Balancing & Failover PCC Load Balancing & Failover 1. What is Policy Based...
March 17, 2026/
IT Courses What is CompTIA+ What is CompTIA+ CompTIA+ refers to a group of IT certifications offered by CompTIA. These...
March 17, 2026/
OSPF Commnds Check OSPF configuration, status, and neighbors on Cisco routersshow ip ospf neighbor Displays OSPF neighbors and their...
March 16, 2026/
OSPF DR and BDR OSPF DR and BDR This lesson demonstrates the OSPF concept of a Designated Router (DR) and...
March 15, 2026/
How does OSPF work The last lesson introduced the most fundamental OSPF terms, such as LSA, LSDB, SPF, Areas, Cost,...