Java Networking Fundamentals

What is a socket in Java?

• A socket in Java is a type of data structure.

• A socket in Java is an endpoint for communication between two machines.

• A socket in Java is used for storing files.

• A socket in Java is a graphical user interface component.

Explain the difference between TCP and UDP.

• TCP is reliable and connection-oriented, while UDP is faster and connectionless.

• TCP is connectionless and has lower latency than UDP.

• UDP guarantees delivery of packets, while TCP does not.

• TCP is faster and connection-oriented, while UDP is reliable and connectionless.

What are the main layers of the TCP/IP model?

• Network, Internet, Link, Session

• Application, Network, Transport, Physical

• Application, Transport, Internet, Network Interface

• Session, Transport, Internet, Data Link

How does a client-server architecture work?

• Clients store all data locally without any server interaction.

• Clients directly communicate with each other without a server.

• The server sends requests to multiple clients simultaneously.

• A client-server architecture works by having clients send requests to a server, which processes the requests and returns responses.

What is the purpose of the transport layer in the TCP/IP model?

• To establish physical connections between devices.

• To manage network routing and addressing.

• To provide reliable data transfer and communication between applications.

• To encrypt data for secure transmission.

Describe how to create a simple TCP server in Java.

• Use DatagramSocket for UDP communication

• Create a TCP server using ServerSocket, accept connections in a loop, and handle client communication with InputStream and OutputStream.

• Implement a web server using HttpServer

• Create a GUI application for client-server interaction

What is the role of the IP protocol in networking?

• The IP protocol manages user authentication in networks.

• The IP protocol encrypts data for secure transmission.

• The IP protocol is responsible for physical data transmission over cables.

• The IP protocol facilitates addressing and routing of data packets in networking.

How do you handle multiple clients in a Java socket server?

• Use a blocking I/O approach for all client connections.

• Use multithreading to spawn a new thread for each client connection.

• Use a single-threaded model to handle all clients sequentially.

• Limit the server to only one client at a time.

What are the advantages of using UDP over TCP?

• Higher reliability due to error correction

• Guaranteed delivery of packets

• More efficient for file transfers

• Lower latency

Explain the concept of port numbers in networking.

• Port numbers are used to identify specific processes or services on a networked device.

• Port numbers are only relevant for wireless networks.

• Port numbers are used to encrypt data during transmission.

• Port numbers are physical connectors on a network device.