How is our Home Internet working

• We have a router which we can connect to using wifi (ethernet cable)
  
• Every device connected to a network gets an ip address
  
• Principle: A device can connect with any other if they are in same network
• When we communicate with any device, a stream of network packets are sent out and generally each packet has three things
  • source
  • destination
  • data
• Router is a device in networking which can forward packets from one network to another, Routers have Route tables which are rules about where the packet has to be forwarded.
• networking is not good with names, it is good with ip addresses, DNS helps in resolving names to ips
• DHCP server is responsible for allocating ip addresses to the devices in a network.
• A Network is considered to be public from the internet i’can connect to this network.
• Private network generally have ips in the following ranges
  • 192.168.0.0 to 192.168.255.255
  • 10.0.0.0 to 10.255.255.255
  • 172.16.0.0 to 172.31.255.255
• NAT allows private networks to connect to internet