Final answer:
Copying a file to a USB drive and giving it to a friend to transfer data is known as Sneakernet. It's a manual form of transferring data via physical media, as opposed to electronic methods like peer-to-peer, client-server, or through the Internet.
Step-by-step explanation:
Understanding Data Transfer Methods
Copying a file to a USB Jump Drive and then handing it to a friend for him to copy to his computer is an example of c. Sneakernet. This term is used to describe a method of data transfer where physical media, such as a USB flash drive, is used to transport data between computers, rather than transmitting it over a network. This method was particularly common before high-speed internet connections were widely available, but is still used for various reasons, such as network security policies or the transfer of large files that may be impractical to send over the internet.
Other methods of data transfer include peer-to-peer, where two or more computers are connected and share files directly without an intermediary server; client-server, where multiple clients request and receive services from a centralized server; and transfers over the Internet, which can involve a variety of protocols and technologies to send data between computers over long distances.