1. Xie Xiren, author of Computer Network = = Andrew S Tannenbaum, author of Computer Network = = TCP/IP Protocol (just finished reading the first volume) = = "
2. "Bird Brother Linux Private Kitchen" (this book contains a lot of knowledge about network security, and it is easy to get started) = = "
3. Shi Zhiguo's Computer Network Security Course (this book is characterized by a lot of practice, almost all of which are made by himself) = = = "White Hat on Web Security" (written by a genius boy in Alibaba, who knows that hacking methods are special and there are rich examples) = = = "Cryptography and Network Security" is basically a book that will be more in-depth in different directions in the future.
By the way, I suggest you read Cisco's books at the same time, which will be very helpful.
You can ask if you don't understand. Good luck.