Which protocol ensures that data will reach its destination and it will not be corrupted on its way?

The protocol that ensures data will reach its destination without corruption is the Transmission Control Protocol (TCP).

Here are the steps explaining how it works:

1. Connection Establishment: Before any data transfer takes place, TCP establishes a connection between the sender and the receiver. This is done through a process known as a three-way handshake.

2. Data Transfer: Once the connection is established, data transfer begins. TCP breaks the data into smaller packets for transmission. Each packet is assigned a unique sequence number, which helps in reassembling the data at the receiver's end.

3. Error Checking: TCP uses a method called checksum to check for any errors in the data. If an error is detected, the packet is retransmitted.

4. Acknowledgement: After a packet is received and checked for errors, the receiver sends an acknowledgement to the sender. If the sender does not receive an acknowledgement within a certain time, it assumes the packet was lost and retransmits it.

5. Flow Control: TCP uses a mechanism called flow control to ensure that the sender does not overwhelm the receiver by sending data faster than it can process.

6. Connection Termination: Once all the data has been transferred, the connection is terminated through a process similar to the three-way handshake used to establish the connection.

So, TCP not only ensures that data will reach its destination, but also that it will not be corrupted along the way.