Multiple choice questions on Python `socket` and network programming

📚 Quick Study Guide

• 🌐 Sockets: Endpoints of a two-way communication link between two programs running on the network.
• 🐍 `socket` Module: Python's built-in module for network communication.
• 🏠 Address Families:
  • `AF_INET`: IPv4 addresses.
  • `AF_INET6`: IPv6 addresses.
• 📡 Socket Types:
  • `SOCK_STREAM`: TCP (Transmission Control Protocol) – reliable, connection-oriented.
  • `SOCK_DGRAM`: UDP (User Datagram Protocol) – unreliable, connectionless.
• 🔑 Common Socket Functions:
  • `socket()`: Creates a socket object.
  • `bind()`: Binds a socket to an address (host and port).
  • `listen()`: Enables a server to accept connections.
  • `connect()`: Establishes a connection with a server.
  • `accept()`: Accepts a connection from a client.
  • `send()`: Sends data through the socket.
  • `recv()`: Receives data from the socket.
  • `close()`: Closes the socket.
• 🔢 Ports: Numerical identifiers used to distinguish different network applications on a single device (e.g., HTTP: 80, HTTPS: 443).
• 🔒 TCP Handshake (Three-Way Handshake): SYN, SYN-ACK, ACK – Establishes a reliable connection.

🧪 Practice Quiz

1. Which address family is used for IPv4 addresses in the Python `socket` module?
   1. `AF_UNIX`
   2. `AF_INET`
   3. `AF_BLUETOOTH`
   4. `AF_APPLETALK`
2. Which socket type provides a reliable, connection-oriented communication?
   1. `SOCK_DGRAM`
   2. `SOCK_RAW`
   3. `SOCK_STREAM`
   4. `SOCK_RDM`
3. What function is used to bind a socket to a specific address (host and port)?
   1. `connect()`
   2. `listen()`
   3. `bind()`
   4. `accept()`
4. Which function is used by a server to listen for incoming connections?
   1. `connect()`
   2. `bind()`
   3. `listen()`
   4. `accept()`
5. What is the purpose of the `accept()` function?
   1. To send data to a client.
   2. To receive data from a client.
   3. To establish a connection with a server.
   4. To accept a connection from a client.
6. Which protocol is associated with `SOCK_DGRAM`?
   1. TCP
   2. UDP
   3. HTTP
   4. FTP
7. What is the primary function of the `close()` method in socket programming?
   1. To send data.
   2. To receive data.
   3. To terminate the socket connection.
   4. To bind the socket to an address.