Modification is the name given to an attack that makes changes into original data such as users manually modifying data, programs processing and changing data, and equipment failures.
In modification attacks, only changes are made to original data without deleting it completely. Modification is basically a type of attack in the context of information security. This type of attack creates annoying situations and discords by altering existing data in data files, inserting new false information in the network and reconfiguring network topologies and system hardware. 
Modification attack is mainly mounted against sensitive and historical data. Modification attacks target integrity of the original data with an intent of fabricating it.
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Answer:
WAN or wide area network
Explanation:
The Internet is the most basic example of a WAN. It is connecting all computers together around the world.
 
        
             
        
        
        
Answer: personal area network
Explanation:
it can connect personal devices to make network, the personal network are phone,laptop,printer and soon in order to communicate.