Answer:
Due to unreachable DHCP server 
Explanation:
As we know that Dynamic Host Configuration Protocol, in short  DHCP is the network protocol which is used to central and automatic management of IP address with in the network.
So due to unreachable DHCP server a student could not able to connect with the internet.When the network connection break it means that DHCP server is offline.
So the answer is Due to unreachable DHCP server .
 
        
             
        
        
        
The contains criteria filter requires the records displayed to have the specified text string anywhere. Thecontains operator is used to perform case-sensitive matching regardless of location in strings. 
The begins with criteria filter on the other hand requires the records displayed to start with the specified text string
 
        
             
        
        
        
Answer:
False because the inside could be dirty and cause problems.
Explanation:
 
        
             
        
        
        
Answer:The kernel provisions hardware resources to meet software requirements.
Explanation: Kernel is the program which behaves as the central component of the operating system.The main purpose of the kernel is to control the operation of the system to manage it. 
Monolithic kernel and micro-kernel are two types of kernel units present in the computer system where they work for fulfilling the software requirement by attaching it to the hardware parts.
Other option are incorrect because it does not work for Cisco device, does not perform any specific feature only , no linkage is created between the hardware and the electronics nor reacts as navigation bar.
 
        
             
        
        
        
It might be an 81 because if you fail 0/100 yo grade is going DOWN