typeracer

Since the packets are numbered, it is easy for TCP to keep track of missing packets. If the server or host sees that packet number 25 is missing, it will request it again. Once the packet makes it to the destination, it is reassembled into the original file. This ensures that all packets eventually make it to the correct destination. The Internet is fault tolerant since if there is an error, the system will still work properly. Without this property, the whole system could fail if one packet was misplaced.