Network Programming quiz-TCP UDP_socket programming

Which of the following is true about the bind() function in socket programming?

• It associates a socket with a specific port and IP address.

• It establishes a connection between client and server.

• It sends data over the network.

What is the primary purpose of the recvfrom() function in UDP socket programming?

• To receive data from any client.

• To establish a connection with a client.

• • To send data to a specific client.

Which protocol is commonly used for DNS queries due to its low overhead?

• UDP

• TCP

• HTTP

What is the size of the UDP header?

• 8 bytes

• 16 bytes

• 32 bytes

• 64 bytes

Which of these is not a valid reason why a UDP client may not receive a server response?

• TCP handshake failed

• Server not listening on expected port
  

• Network drops the packet

Which of the following is NOT a function of the Transport Layer in the OSI model?

• Routing

• • Segmentation and reassembly

• Flow control

• Error control

Which of the following is the best method for building a high-concurrency TCP server?

• Using epoll() or select() for I/O multiplexing

• Using a separate thread for each connection

• Using blocking sockets in a loop

What does SO_RCVTIMEO socket option configure?

• Timeout for receiving data

• Maximum data rate

• port range

• thread priority

Consider the following code snippet. What does it do?

int sockfd = socket(AF_INET, SOCK_STREAM, 0); connect(sockfd, (struct sockaddr*)&server_addr, sizeof(server_addr)); send(sockfd, "Hello", 5, 0); shutdown(sockfd, SHUT_WR); recv(sockfd, buffer, sizeof(buffer), 0);

Why is it dangerous to use recv() without a size constraint or timeout in TCP, and how can you mitigate the risks?