Router Technology What is Router & How Works A router is a networking device used to connect multiple networks and forward data from one network to another. It works at…

Routing Technology What is Routing Routing is the process of selecting the best path for data to travel from one network to another network. When data is sent from a…

Broadcast Domains What is a broadcast domainIn Ethernet LANs, a broadcast is one-to-all communication, which means that if a node sends a broadcast frame, everybody receives a copy of it. At the Ethernet…

Collision Domain To understand what a collision domain is, we have to look a little bit in the past when Ethernet LANs were built using devices like Hubs and Bridges.Ethernet…

ARP Protocol ARP Role Address Resolution Protocol (ARP) is a very fundamental protocol in computer networking.  When a PC wants to send a message over the network, it has to encapsulate the…

OSPF Areas And LSA Types Quick Definition: Open the shortest path first (OSPF) areas to help break up your networks and routers and find the shortest and most efficient route from…

LSA in OSPF A router’s Link-State Database stores LSAs that are received (LSDB). The Shortest Path First (SPF) algorithm is used by OSPF to determine the optimum routes for each…

LSA Types 1,2 and 3 OSPF learns the topology by exchanging link-state advertisements (LSAs). Engineers preparing for the CCNA exam are often intimidated by the LSA concept and either do…

OSPF Network Types Why does OSPF need network types?Routers can be connected via various types of WAN services. Many old and new WAN technologies can provide IP connectivity between devices.…

OSPF Metric - Cost OSPF Metric - Cost This lesson discusses how OSPF determines the best paths to destinations using its metric called "OSPF Cost". It is a fundamental concept…