Delivery, Accuracy, and Timeliness in Data Communication Systems
Delivery, accuracy, and timeliness are crucial characteristics of a data communication system that ensure the effective and efficient transfer of data from one point to another. Let's delve into each of these characteristics:

Delivery:
Delivery refers to the successful transmission of data from the sender to the receiver without any loss or corruption. A reliable data communication system should guarantee the delivery of data packets to the intended destination in the correct order.

Accuracy:
Accuracy is another essential characteristic of a data communication system. It ensures that the data transmitted is error-free and maintains its integrity throughout the communication process. Error detection and correction mechanisms are implemented to maintain the accuracy of the data.

Timeliness:
Timeliness is the third critical characteristic of a data communication system. It pertains to the speed and efficiency of data transmission, ensuring that data reaches the destination within an acceptable timeframe. Timeliness is crucial in real-time applications where prompt data delivery is essential.

Security:
Although not mentioned in the question, security is another significant characteristic of a data communication system. Security measures such as encryption, authentication, and access control are implemented to protect data from unauthorized access, interception, and tampering.
In conclusion, while delivery, accuracy, and timeliness are vital characteristics of a data communication system, security also plays a crucial role in ensuring the confidentiality and integrity of transmitted data.