In fact, there is no difference between good and bad, and you need to choose according to your own situation.

Let me talk about the advantages of offline training courses:

1. can provide you with an immersive learning environment; 2. Be able to learn and penetrate knowledge relatively systematically; 3. When encountering problems, teachers will answer them and students will discuss them. 4. You can also recommend employment.

The advantages are obvious, but the disadvantages also exist:

1. The tuition fee is expensive, starting from 10,000; 2. easy to encounter pits

If you want to participate in offline training, it is recommended to choose carefully and get to know it on the spot.

After talking about offline training, let's talk about "behind closed doors" and whether self-study is feasible.

Some people say 1. Self-study is not systematic and easy to take detours; 2. Self-study takes a long time and I don't know when to learn; 3. People who don't communicate and discuss problems are easily discouraged and hurt their self-confidence.

I still agree with you in the above situation. Self-study requires a certain degree of self-control and willpower. You can't fish for three days and dry the net for two days. You should keep studying every day and be efficient.

The advantages of self-study examination are obvious: 1. Learning to save money at almost zero cost only requires a computer with internet access; 2. Be able to arrange the learning route according to your own needs; 3. Time is free, place is free, and everything is driven by interests.

If you are a student with strong self-study ability and enthusiasm for penetration testing, I suggest taking the road of self-study penetration, but this road is doomed to be full of loneliness, so you must stick to it.

How long will it take to study the penetration test?