In which type of hacking does the user block access from legitimate users without actually accessing the attacked system?

Complete Question:

In which type of hacking does the user block access from legitimate users without actually accessing the attacked system?

Group of answer choices

a. Denial of service

b. Web attack

c. Session hijacking

d. None of the above

a. Denial of service

Explanation:

Denial of service (DOS) is a type of hacking in which the user (hacker) blocks access from legitimate users without actually accessing the attacked system.

It is a type of cyber attack in which the user (an attacker or hacker) makes a system or network inaccessible to the legitimate end users temporarily or indefinitely by flooding their system with unsolicited traffic and invalid authentication requests.

A denial of service is synonymous to a shop having a single entry point being crowded by a group of people seeking into entry into the shop, thereby preventing the legitimate customers (users) from exercising their franchise.

Under a DOS attack, the system or network gets stuck while trying to locate the invalid return address that sent the authentication requests, thus disrupting and closing the connection. Some examples of a denial of service attack are ping of death, smurf attack, email bomb, ping flood, etc.