AWS Certified Advanced Networking Specialty Practice Exam

Which protocol must the hospital utilize to communicate successfully with a service over AWS PrivateLink?

1. User Datagram Protocol (UDP)

2. Hypertext Transfer Protocol (HTTP)

3. Transmission Control Protocol (TCP)

4. File Transfer Protocol (FTP)

The correct answer is: Transmission Control Protocol (TCP)

To communicate successfully with a service over AWS PrivateLink, the hospital must utilize the Transmission Control Protocol (TCP). PrivateLink is designed to provide private connectivity between Virtual Private Clouds (VPCs) and services, allowing for a secure and scalable way to connect these resources without traversing the public internet. TCP is a connection-oriented protocol that ensures reliable data transmission over a network. It establishes a connection between the sender and receiver before transmitting data, and it includes mechanisms for error recovery, ensuring the integrity of the data being communicated. This reliability is essential in environments like healthcare, where communication is critical and the loss of data packets can have serious implications. Although other protocols like HTTP and UDP can also operate over TCP, they do not provide the same level of reliability. HTTP relies on TCP for its underlying transport layer, meaning it will work over PrivateLink, but it is not the protocol that establishes the connection. Similarly, while UDP is used for applications where speed is crucial and some data loss is acceptable, it lacks the necessary guarantees for reliable delivery required in healthcare applications. Using TCP as the underlying transport layer ensures that the services accessed over AWS PrivateLink maintain a reliable and robust connection, which is vital for the healthcare environment.