What if your job were to outsmart hackers, protect private information and stop cyber criminals? That is the daily work of cybersecurity professionals. The field offers many careers, from solving cybercrimes like a detective to designing secure apps or teaching online safety. You do not need to be a programming expert. The best people in this field are creative problem-solvers who can think like attackers and explain complex ideas simply. As cybersecurity grows rapidly, more talented people are needed. Below are four exciting careers.

App or game security designer

These designers build safety features into the apps and games you use every day. They ensure your login information and payments stay safe, and they prevent cheaters from ruining the experience. They plan security from the very beginning and create safe ways to store personal information, such as using secret codes. Their goal is to create strong protection that does not disturb the user experience.

Cyber teacher

Cybersecurity skills can also be used to teach others. Cyber teachers help people learn to stay safe online. They explain how to create strong passwords, spot online scams, protect personal information and avoid cyber threats. By making security concepts simple, they raise awareness and help everyone make smarter choices on the Internet. They may work in schools, libraries or community centres.

Ethical hacker

Ethical hackers are “good” hackers. Companies hire them to break into their own websites, apps and networks to find security holes before real criminals do. By discovering weaknesses, they help companies fix problems and protect users’ data. This job suits curious people who love solving puzzles and have strong tech skills. They must also keep learning about the latest tricks used by cyber criminals.

Cyber investigator

Like online detectives, cyber investigators prevent and solve cybercrimes such as hacking, identity theft and online scams. They watch for warning signs, monitor suspicious activity and study how criminals work. When a crime occurs, they follow digital clues — strange messages, suspicious accounts or IP addresses — to find the attacker and understand what happened. They often work with companies, schools or the police.

1.1.When do app security designers start to work on protection?

A After user complaints arise.

B When the app becomes popular.

C At the earliest stage of development.

D Once a security hole is found.

解析：选C。C细节理解题。根据文中对应用或游戏安全设计师的描述，“They plan security from the very beginning”（他们从最开始就规划安全措施），可以明确得知他们在开发的最早阶段就着手进行保护工作，而不是等用户投诉、应用流行或发现漏洞后才开始。故选C。

2.2. What do ethical hackers do?

A They remove computer viruses.

B They uncover system weaknesses.

C They design security software.

D They catch cyber criminals.

解析：选B。B细节理解题。原文明确指出，道德黑客受雇“to break into their own websites, apps and networks to find security holes”（闯入公司自己的网站、应用和网络以发现安全漏洞），“By discovering weaknesses, they help companies fix problems”（通过发现弱点，他们帮助公司修复问题）。故选B。

3.3.What is the third paragraph mainly about?

A Reasons schools need cyber teachers.

B How to create strong passwords.

C What a cyber teacher does.

D The dangers of online scams.

解析：选C。C段落大意题。第三段主要介绍了网络教师这一职业，“Cyber teachers help people learn to stay safe online. They explain...”（网络教师帮助人们学习安全上网，他们解释……）以及“By making security concepts simple... They may work in schools...”都是在说明他们的角色和工作内容。选项A只提到学校需求，过于片面；选项B的“如何创建强密码”只是他们可能教授的一个细节；选项D则把段落主题曲解成了网诈骗局的危险性。故选C。

4.4.What can we infer about the work of a cyber investigator?

A It requires careful analysis of clues.

B It is mostly an outdoor job.

C It relies on luck, not skill.

D It focuses on tracking IP addresses.

解析：选A。A推理判断题。文中描述网络调查员需要“watch for warning signs, monitor suspicious activity”（留意预警信号，监控可疑活动），并在犯罪发生后“follow digital clues — strange messages, suspicious accounts or IP addresses — to find the attacker”（追踪数字线索——奇怪信息、可疑账户或IP地址——来找到攻击者）。从这些细致入微的侦查工作可以推断，这项工作需要耐心和仔细的线索分析。原文线索全为线上数字行为，并非户外工作，B错；工作依赖于技能和系统分析，而非运气，C错；文中网络调查员追踪的线索包括strange messages, suspicious accounts or IP addresses，IP地址只是众多线索之一，并非“主要焦点”，所以不能推断出其工作主要聚焦于追踪IP地址，D错。故选A。