Data Networking/Fall 2014/Shalini/Algorithm

Algorithm

The algorithm for the project is as follows:

1.The client tries to connect to the network.

       If    valid client
               Connect successfully to the network 
      Else
               Restart the connection or contact the network administrator for troubleshooting.

2. Client must obtain IP address.

  If  static allocation
     IP address is given manually by user
  Else  DHCP allocation 
     The client sends a request to DHCP for IP allocation. 

3. Client sends request to DHCP.

   If request is successful
               DHCP replies with IP address
    Else  
               DHCP replies with request failed. 
                Restart the connection or contact the network administrator for troubleshooting.

4.Client wants to access webserver.

  If  domain name entered is correct
       Forward request to DNS for resolving IP address.
       DNS replies with IP address of webserver. 
  Else If   DNS reply fails
        Webserver cannot be accessed. 
        Retry 
   Else if   URL is entered wrong
         Access to server fails
         Retry 

5.Client accesses the web server.

 If  client received IP of webserver from DNS
       Send HTTP request to webserver 
   Else If  HTTP request is successful
       Webpage is loaded
   Else if HTTP request fails
       Webpage is not loaded