I would say the number varies.
        
             
        
        
        
Answer:
The answer to this question is option "d".
Explanation:
 The answer is user will not be able to login at all. The user wants to log in to the salesforce by its IP address. But in the server, all the IP addresses will be registered for their special work. When the user inserting their IP address to log in to the salesforce. The first server will be checking into there database. If IP address doesn't match it will not permit to access salesforce because in their server it is not a valid IP address. It is registered in sever but not for this user.
So the answer to this question is option "d".
 
        
             
        
        
        
Answer:
Elements
Explanation:
A computer code acts as a medium by which a person can communicate with the computer machine.
One such language is known as HTML or hypertext markup language.  HTML stands for Hypertext markup language which is used to markup the language for web pages in computer.
The HTML series consists of a series of elements which are enclosed in the tags commonly called start tag and a stop tag.
Example <head>  
here,  
the head is a series of elements.
< start-tag
> stop-tag
Thus, element is the correct answer.