Basic Concept

    

Computer Network

Before understanding the concept of Computer Networking lets take an example, then you will get it in the better way.

Suppose we are in the foreign country,we do not know anything about and we have to go for the purchase of packet of cheese. The very first thing we do is to make a route table of the path and second note down the destination and home address. Then we look for the available facilities (Bus, Train, etc) and go through it.After arrival at the location, there is requirement of a translator  through which we  asked for the packet of cheese and then to the shop-keeper in some universal languages (the language which can be easily understand by both ). Then we come back after getting the packet.

Data Transmission

The same process computer also does, when we connect to the Internet.Here,

• Home address is our MAC address and private (public) IP address.
• Cheese id our Web Packets.
• IP address of the web packets is our destination address. 
• Available facilities is our Service Provider(airtel, jio, tata,etc).
• Shop is  https://knowaboutsecurity.blogspot.com/2018/08/internet-service-provider.html Server (Master Computer).
• Route table is our Router and switches (through which data is transmitted).
• Universal languages are TCP/IP  or OSI model. 
• Translator is Domain Name Server (DNS).