1. Define the term Computer Networks.
A Computer network is a number if computers interconnected by one or more transmission paths. The transmission path often is the telephone line, due to its convenience and universal preserve.
2. Define Data Communication.
Data Communication is the exchange of data (in the form of Os and 1s) between two devices via some form of transmission medium (such as a wire cable).
3. What is the fundamental purpose behind data Communication?
The purpose of data communication is to exchange information between two agents.
4. List out the types of data Communication.
Data Communication is considered
Local – if the communicating device are in the same building.
Remote – if the device are farther apart.
5. Define the terms data and information.
Data: is a representation of facts, concepts and instructions presented in a formalized manner suitable for communication, interpretation or processing by human beings or by automatic means.
Information: is currently assigned to data by means by the conventions applied to those data.
6. What are the fundamental characteristics on which the effectiveness of data communication depends on?
The effectiveness of a data communication system depends on three characteristics.
1. Delivery: The system must deliver data to the correct destination.
2. Accuracy: The system must deliver data accurately.
3. Timeliness: The system must deliver data in a timely manner.
7. Give components of data communication.
1. Message – the message is the information to be communicated.
2. Sender – the sender is the device that sends the data message.
3. Receiver – the receiver is the device that receive the message.
4. Medium – the transmission medium is the physical path by which a message travels from sender to receiver.
5. Protocol – A protocol is a set of rules that govern data communication.
8. Define Network.
A Network is a set of devices (nodes) connected by media links. A node can be a computer, printer, or any other device capable of sending and / or receiving data generated by other nodes on the network.
9. What are the advantage of distributed processing?
1. Security / Encapsulation
2. Distributed database
3. Faster problem solving
4. Security through redundancy
5. Collaborative processing
10. What are the three criteria necessary for an effective and efficient network?
1. Performance
2. Reliability
3. Security
11. Name the factors that affect the performance of a network
-performance of a network depends on a number of factors,
1. Number of users
2. Type of transmission medium
3. Capabilities of the connected hardware
4. Efficiency of software.
12. Name of the factors that affect the performance of a network.
1. Frequency of failure
2. Recovery time of a network after a failure.
3. Catastrophe.
13. Name the factors that affect the security of a network.
Network security issues include protecting data from unauthorized access and viruses.
14. Define PROTOCOL
A protocol is a set of rules (conventions) that govern all aspects of data communication.
A Computer network is a number if computers interconnected by one or more transmission paths. The transmission path often is the telephone line, due to its convenience and universal preserve.
2. Define Data Communication.
Data Communication is the exchange of data (in the form of Os and 1s) between two devices via some form of transmission medium (such as a wire cable).
3. What is the fundamental purpose behind data Communication?
The purpose of data communication is to exchange information between two agents.
4. List out the types of data Communication.
Data Communication is considered
Local – if the communicating device are in the same building.
Remote – if the device are farther apart.
5. Define the terms data and information.
Data: is a representation of facts, concepts and instructions presented in a formalized manner suitable for communication, interpretation or processing by human beings or by automatic means.
Information: is currently assigned to data by means by the conventions applied to those data.
6. What are the fundamental characteristics on which the effectiveness of data communication depends on?
The effectiveness of a data communication system depends on three characteristics.
1. Delivery: The system must deliver data to the correct destination.
2. Accuracy: The system must deliver data accurately.
3. Timeliness: The system must deliver data in a timely manner.
7. Give components of data communication.
1. Message – the message is the information to be communicated.
2. Sender – the sender is the device that sends the data message.
3. Receiver – the receiver is the device that receive the message.
4. Medium – the transmission medium is the physical path by which a message travels from sender to receiver.
5. Protocol – A protocol is a set of rules that govern data communication.
8. Define Network.
A Network is a set of devices (nodes) connected by media links. A node can be a computer, printer, or any other device capable of sending and / or receiving data generated by other nodes on the network.
9. What are the advantage of distributed processing?
1. Security / Encapsulation
2. Distributed database
3. Faster problem solving
4. Security through redundancy
5. Collaborative processing
10. What are the three criteria necessary for an effective and efficient network?
1. Performance
2. Reliability
3. Security
11. Name the factors that affect the performance of a network
-performance of a network depends on a number of factors,
1. Number of users
2. Type of transmission medium
3. Capabilities of the connected hardware
4. Efficiency of software.
12. Name of the factors that affect the performance of a network.
1. Frequency of failure
2. Recovery time of a network after a failure.
3. Catastrophe.
13. Name the factors that affect the security of a network.
Network security issues include protecting data from unauthorized access and viruses.
14. Define PROTOCOL
A protocol is a set of rules (conventions) that govern all aspects of data communication.
