March 31, 2026/
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OSPF Network Types Why does OSPF need network types? Routers can be connected via various types of WAN services. Many...
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Layer-2 and Layer-3 Switches Difference Between Layer-2 and Layer-3 Switches Layer-2 Switch A Layer-2 switch works only with MAC addresses to forward frames inside the same network or VLAN. It is...
BGP Routing Protocol. BGP Description BGP Stand For – Border Gateway Protocol Path Vector Routing Protocol Classless Routing Protocol By-Defauelt Auto-Summary is Disabled Maximum Path – By-Defauelt-1...
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...
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March 31, 2026/
OSPF Metric – Cost OSPF Metric – Cost This lesson discusses how OSPF determines the best paths to destinations using...
March 31, 2026/
Configuring Single-Area OSPF network Lab Initial State We use the topology shown in the diagram below. Seven network devices are...
March 29, 2026/
OSPF Default Route What is a Default Route When a router receives an IP packet, it matches the destination IP...
March 29, 2026/
OSPF Passive Interface Why do we need an OSPF passive interface? A router often does not need to form neighbor relationships...
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...