Name:______________________________     Alpha:________________________________ 

1. [10pts] You are given an integer x that is an 8-bit number (i.e., x is between 0 and 255).
   • How would you flip the first 4 bits of x?

   • How would you change the last 4 bits of x to be all 1s?

2. [10pts] Bob would like to connect to Alice and have a netcat chat with him. Alice's IP address is 100.101.102.103, and she will listen at UDP port 9876. Give a terminal command for each of Alice and Bob. (Note: Understand every detail correctly so you don't miss anything)

   Alice:

   Bob:

3. [8pts] For a TCP server socket, you need to do the following.
   
   
   1. Create a socket by calling ___________________.
      
      
   2. You need to _________________ the socket to a specific port so that the clients can connect the server by using that specific port.
      
      
   3. Call ________________ to look for any connection attempt from a remote client.
      
      
   4. Now, you can _______________ any connection request.
4. [12pts] For a TCP client socket, you need to do the following.
   
   
   1. Create a socket by calling _________________.
      
      
   2. Connect to a server by calling _________________.
      
      
   3. Use _______________ and ________________. You need to use the data of ___________________ type.
      
      
   4. Close the socket by calling ________________.

Submission deadline