All my books and articles written in the field of networking and security can be seen here. You can go to the DIN Telegram channel to download the books.
The Read team (De-En-Pe)
Software Defined Network (En)
SD-WAN (En)
Asymmetric Encryption (En)
Symmetric Cryptography (En)
CCNA Q&A (Pe)
31 Days Before CCNA Security Exam (Pe)
CCNP Security Firewall (Pe)
Cisco Password Type (Pe)
Study of The Impact of Failure GRE Tunnel (En)
GRE Tunneling (En)