Penetration for a specialist is an operational activity that ensures the security of the IT infrastructure and includes analysis and reporting of incidents.
Security operations break down organizational and cultural barriers and eliminate inefficiencies and conflicts by establishing and adjusting security strategies.
The field of communication and network security covers the ability to protect communication and network channels. Topics include secure and converged protocols.
The goal of security architecture is to provide you with the concepts, principles, frameworks, and standards used to design and secure operating systems.
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The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
The technical storage or access that is used exclusively for statistical purposes.The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
List of hacker, crackers, carders and cyber criminals forums for investigators (Part 1.) 
Part 8: A practical guide to using Wireshark and tcpdump on local networks. (Transport Layer Protocols) 
Part 7: A practical guide to using Wireshark and tcpdump on local networks. (Network Layer Protocols) 
Part 6: A practical guide to using Wireshark and tcpdump on local networks. (Command line packet analysis) 
Part 5: A practical guide to using Wireshark and tcpdump on local networks. (Additional features of Wireshark)