NOTE:

1. USE PYCHARM 2020 OR PYTHON 3

2. Program must allow user to input values. For instance: ?u www.google.com 8.8.8.8

3. Please show screenshot of your program output and program codes.

Problem 1:

insert a screenshot of your program output for the following scenario:

Problem: An Internet Service Provider (ISP) must, as part of its service to customers, provide a Domain Name Server (DNS). A DNS is a server that maintains a database of domain names, such as www.griffith.edu.au, and their corresponding Internet Protocol Addresses (IPA), such as 132.234.243.22. A domain name has only one IPA, but an IPA may have many domain names. Define a class that simulates a DNS. It must have: . a method for updating the DNS with a new domain name and its IPA; a method for returning the IPA for a domain name, or None if it does not exist; and whatever private attributes are required to support the methods. Write a test program that allows the user to test the class, by typing in fake domain names and IPAs to update the DNS, and domain names to look up. An example of the output from the test program is like this: ? u www.google.com 8.8.8.8 ? u www.amazon.com 2.2.2.2 ? u www.cnn.com Bad command. ? I www.google.com 8.8.8.8 ? I www.amazon.com 2.2.2.2 ? I www.cnn.com None ? where: a u DNS IPA updates the DNS with a new domain name and its IPA; I DNS returns the IPA for a domain name, or None if it does not exist; and q ends the test program. Bad inputs are to be reported and ignored. . ? u www.apple.com 10.10.10.10 ? u www.tesla.com 11.11.11.11 ? U www.python.org ? 1 www.apple.com ? 1 www.python.org 29