Final answer:
Statements 1 and 2 are correct regarding connectionless and connection-oriented networks. Connectionless networks send data without prior connection, while connection-oriented networks establish a set path before data transfer. The claims about reliability and efficiency in statements 3 and 4 require further context to determine their validity.
Step-by-step explanation:
To address the question about connectionless and connection-oriented networks:
- Connectionless networks do not require a dedicated connection before transmitting data. This is true; in such networks, data is sent without establishing a fixed route, and each data packet can travel through different paths to reach the destination.
- Connection-oriented networks establish a dedicated connection before transmitting data. This is also true, as these networks require a set route to be established before any data transfer can occur, ensuring a reliable path for the data to travel.
- Connectionless networks are more reliable than connection-oriented networks. This statement is generally false. Connection-oriented networks tend to be more reliable because they establish a predetermined path for communication, which reduces the chances of data loss and ensures the correct sequence of data delivery.
- Connection-oriented networks are more efficient than connectionless networks. This statement can be misleading as efficiency depends on the context. Connection-oriented networks can be more efficient in maintaining data integrity and sequence, while connectionless networks might be more efficient in terms of network resource utilization as they do not need to establish and maintain a connection.
Therefore, statements 1 and 2 are correct regarding connectionless and connection-oriented networks, whereas statements 3 and 4 cannot be universally accepted as correct without further qualification.