Implementation Manager (IM) Specialist CHTS Practice Test

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What type of data transmission does TCP provide on a local area network?

Unreliable transmission
Connectionless transmission
Reliable transmission
Compressed transmission

The correct answer is: Reliable transmission

TCP, or Transmission Control Protocol, is designed to provide reliable data transmission over a network, including local area networks (LANs). It achieves this reliability through several mechanisms. Firstly, TCP establishes a connection between the sender and receiver before data transfer begins, which is known as a three-way handshake. This process ensures that both parties are ready to communicate and that data can be sent without loss. Secondly, TCP implements error checking and correction. Each segment of data sent includes a checksum, and the receiving end verifies this checksum to ensure the data has not been corrupted during transmission. If a segment is found to be corrupt, TCP can request the sender to retransmit it, ensuring that the receiver has an accurate copy of the data. Additionally, TCP manages data flow and congestion through various techniques, ensuring that a sender does not overwhelm a receiver with too much data too quickly, further enhancing reliability. These features together provide a robust, reliable communication protocol suitable for transmitting data across a local area network, which is why it is considered reliable transmission.