What is called "Network"? It is a collection of computers, mainframes, servers or other devices connected to one another and allowed to share data. What is "IP address"? That's how devices recognize each other in a network. LAN - Local Area Network Group of computers and devices sharing a common communication line or a server and commonly LAN is distributed in a office or in a building. In a Network, the main things we consider are Network Speed Delay Availability CDN - Content Delivery Network The group of servers which are distributed geographically and work together to deliver the deliver pages and web content, or can be consider as proxy servers to prevent the delay. Network topologies Star topology used a central switch or connecting devices. Bus topology Ring topology Every Computer are connected to the adjacent computers and created a ring. Network Models TCP/ IP model OSI ( Open Syste
