Networking is an essential aspect of modern computing, enabling devices to communicate and share information with each other over a network. Encapsulation is a critical concept in networking that involves the wrapping of data and information within a protocol-specific header and footer. This process allows data to be transmitted across a network while maintaining its integrity and ensuring that it is properly delivered to the intended recipient. If you are just intrested in learning more about how data is transmitted over a network, this article is for you.
n the figure above, I am trying to show that when we send data from one network to another, some additional information is also passed along with the data.
- Firstly, a UDP/TCP header is attached, which contains the source and destination port numbers.
- The second layer contains the source and destination IP addresses.
- The Ethernet header addresses the next hop on the local network. Basically, it will consume the IP packet if the destination address matches the current address of the network node; otherwise, it will replace the Ethernet header with one addressed to the next hop.