Execution Instructions (macOS)  

Follow these steps to compile and run the source code on a macOS system:  

1. Open Two Terminal Windows  
   Navigate to the source code directory using the `cd` command in both terminals.

2. Start the Server (First Terminal)  
   Run the following commands sequentially:  

   gcc -c checksum_utils.c -o checksum_utils.o  
   gcc server.c checksum_utils.o -o server  
   ./server  

3. Start the Client (Second Terminal)
   Run the following commands sequentially:  
   
   gcc -c checksum_utils.c -o checksum_utils.o  
   gcc client.c checksum_utils.o -o client  
   ./client