Answer:
If you do not know you are a brain in a vat, you do not have hands.
Explanation:
This premise is plausible as to understand the handless brain which is floating in a vat. The brain is connected to a super computer and it transmits messages to the brain. The brain receives those message and give signals to perform tasks. 
 
        
             
        
        
        
Answer:
The memory used in this system does not perform checking error.
Explanation:
Non ECC memory is referred to  the non error checking. In this configuration the computer is able to perform assigned tasks quickly but is unable to perform checking errors. The memory supports 16GB system and the 1333 MHz is the speed of the memory.
 
        
             
        
        
        
THe staff of the medical office will need to enter, maintain and retrieve data from electronic health records within a hospital. EHR is the term used which means electronic health records that recorded all the health data of the hospitals.
        
             
        
        
        
Answer:
a modular router
Explanation:
A modular router is a type of router that will provide multiple slots, this will enable the network engineer to either change or increase the number of space the router has.
A layer 3 switch cannot provide a WAN connectivity even though it can increase the number of ports on a router. The concept of PoE capability of any device have nothing to do with the number of ports it has. If the Engineer decides to use another fixed configuration router it will still lead to the same problem in the future because it cannot guarantee or provide the flexibility of future growth adaptation which can be given by a modular router if put in use.