Advanced Placement (AP) Computer Science

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Prepare for the AP Computer Science Exam. Study with flashcards and multiple-choice questions. Each question comes with detailed explanations and hints. Excel in your exam!

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What is packet switching?

A method for storing data on a server
A total data transmission without division into segments
A technique for transmitting data as packets over shared mediums
A protocol for direct file sharing between devices

The correct answer is: A technique for transmitting data as packets over shared mediums

Packet switching is a method of data transmission that involves breaking down messages into smaller packets before they are sent over a network. Each packet can take a different route to reach its destination, where they are then reassembled in the correct order. This technique allows for more efficient use of network resources, as multiple packets from different sources can share the same transmission medium simultaneously, reducing congestion and increasing speed. The choice highlighting packet switching accurately reflects its operational principle of sending data as independent packets over a shared medium. This contrasts with other methodologies like circuit switching, which establishes a dedicated path for the entire duration of a transmission. Packet switching's flexibility and efficiency are especially critical in modern networks, including the Internet, enabling robust communication across diverse systems.