As computer use becomes more common, the need for security is more common than ever. One of the greatest security threats in the online world is computer hacking.  

      Computer hacking is the unauthorized access to a computer or network of computers. Hackers are people who illegally enter systems. They may alter or delete information, steal private information, or spread viruses that can damage or destroy files. But how exactly can a hacker get into a system to do these things?  

      Most hackers use information called protocols that are built into computer software. These protocols allow computer to interact with one another. Protocols are sort of like computer police officers. When a computer connects to another system, the protocols check to see if the access is valid. The protocols can also determine how much information can be shared between the two systems. Hackers can manipulate the protocols to get unlimited access to a computer system. 

      In fact, just the act of entering a computer network is considered hacking. This is commonly called passive hacking. Passive hackers get a rush from just being able to access a challenging system like a bank or military network. Another kind of hacker tries to do damage to a system. After hacking into systems, these hackers release viruses or alter, delete, or take information. Known as active hackers, they are, by far, the more dangerous of the two.  

      The easiest way to protect a system is with a good password. Long and unusual passwords are harder for hackers to guess. For even greater security, some online services now use “password-plus” systems. In this case, users first put in a password and then put in a second code that changes after the user accesses the site. Users either have special cards or devices that show them the new code to use the next time. Even if a hacker steals the password, they won’t have the code. Or if the hacker somehow gets the code, they still don’t know the password. 

Question 30. What is the main idea of this reading?  

      A. Famous hackers                                                           B. Funny things that hackers do. 

      C. Hackers and computer security                                    D. Good ways to stop hackers.

Question 31. What do hackers do to get into a computer?  

      A. Spread viruses                                                              B. Change the security programs 

      C. Make a new password                                                  D. Manipulate codes  

Question 32. What is not considered hacking?  

      A. Releasing a virus                                                          B. Illegally accessing a computer 

      C. Turning on a private computer                                    D. Changing unauthorized information 

Question 33. Why are active hackers probably considered more dangerous than passive ones?

      A. Active hackers are more skilled.  

      B. Passive hackers have more intense personalities.  

      C. Active hackers do damage.  

      D. Passive hackers are caught more easily.  

Question 34. What does “plus” in “password-plus” probably mean?  

      A. extra                                B. long                                 C. fast                                  D. danger 

Đề thi thử THPT 2021 - Tiếng Anh - GV Vũ Thị Mai Phương - Đề 22 - có lời giải