Virtual Private Networks are hardware or software that controls ...

[Marty]

Virtual Private Networks are hardware or software that controls access between networks.
 
  Indicate whether the statement is true or false

Question 2

Describe the difference between concrete and abstract classes and give an example for each.
 
  What will be an ideal response?

[smrtceo]

Answer to Question 1

FALSE

Answer to Question 2

An abstract class is one that cannot have instances, while a concrete class can. If a class has all the required attributes and operations that we expect from an object, then it is concrete. If it has only a subset, then it is abstract and we need a more specialized class. For example Art is an abstract class because we have found it to be too general to satisfactorily represent a specific work of art. Saying that somebody is interested in art does not explain enough. At best, it prompts a question: what kind of art? The answer might be music, literature, painting, theatre, etc. On the other hand, the Literature class has enough attributes to be concrete. That is, we believe it can properly represent an actual literary work.

[Marty]

TY

[smrtceo]

Happy to Help