Answer:
D.netiquette 
hope it is helpful to you
 
        
             
        
        
        
1: Application
2: Presentation
3:Session
4: Transport
5:Network 
6: Data link 
7: Physical
Application is a Interface Layer and responsible Layer
<span />
        
             
        
        
        
use an anchor tag(<a>This is an anchor tag</a>) and use the href attribute and set it's destination to the section element who's id or class is "sisters".
Example:
<a href="#Sisters">Click Here!</a>
then you can add this somewhere on the document.
<section id="Sisters">Hello World!</section>
 
        
             
        
        
        
System operations of the website u are  asking to access
        
             
        
        
        
Answer:
The biggest difference between enhanced keyboards is the 12 function keys running across the top of the keyboard, instead of 10 that run down the left side. Other changes include the addition of extra Ctrl, keys, Alt keys, and cursor arrow keys between the letter keys and numeric keypad on the right side.
Explanation: