1. Identify the components of data communication system?
Message: The message is the information to be communicated.
Sender: The sender is the device that sends the data message.
Receiver: The receiver is the device that receives the message.
Medium: The transmission medium is the physical path by which a message travels from sender to receiver.
Protocol: A protocol is a set of rules that governs data communications.
2. What are the advantages of distributed processing?
- Security/Encapsulation.
- Distributed database.
- Faster-problem solving.
- Security through redundancy.
- Collaborative processing.
3. What are the fundamental three characteristics that determine the effectiveness of data communication system?
- Delivery : The system must deliver data to the correct destination.
- Accuracy : The system must deliver the data accurately.
- Timeliness: The system must deliver data in a timely manner.
4. Why protocols are needed?
- A protocol is a set of rules that governs data communications.
- Without a protocol, two devices may be connected but they cannot communicate with each other.
- A protocol defines what is communicated, how and when it is communicated.
5. Why standards are needed?
- Standards are essential in creating and maintaining an open and competitive market for equipment manufacturers and in guaranteeing national and international interoperability of data and telecommunications technology and processes.
- They provide guidelines to manufacturers, vendors, government agencies and other service providers to ensure the kind of interconnectivity necessary in today’s marketplace and in international communications.
