Answer:
RDP port 3389
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Explanation:
A Windows user has informed the helpdesk with such an issue that requires the operator to link to the remote server through Remote Assistance to access the user's screen with a very comprehensive and ambiguous error message. Almost any attempt made by the operator to link to the remote access concludes in a message that says that the connection has been denied. To make this link, the following protocol and the port number combinations must be enabled on the firewall of the remote connection.
 
        
             
        
        
        
Answer:
B.O(1)
Explanation:
When we are implementing ADT stack using linked chain we can pop an entry from the stack having O(1) time complexity because in linked chain we have the head or top pointer in linked chain only.Popping and pushing in stack happens on only one end that is top.So we have move to move top in linked chain to the next and delete prev node.
 
        
             
        
        
        
Answer:
speed and storage
Explanation:
The pros and cons of both are mainly in regards to speed and storage. Due to linked lists elements being connected to one another it requires that each previous element be accessed in order to arrive at a specific element. This makes it much slower than an array-based implementation where any element can be quickly accessed easily due to it having a specific location. This brings us to the other aspect which is memory. Since Arrays are saved as a single block, where each element has a specific location this takes much more space in the RAM as opposed to a linked implementation which is stored randomly and as indexes of the array itself.
Array Implementation: 
- Pros: Much Faster and Easier to target a specific element
 - Cons: Much More Space needed
 
Linked Implementation
- Pros: Less overall space needed
 - Cons: Much slower speed.