What are the types of DBMS?

• Centralized DBMS. In a centralized database, a single central database serves data to multiple devices. …
• Decentralized DBMS. In the decentralized database, all the data is collectively stored in multiple databases. …
• Relational DBMS. …
• NoSQL DBMS. …
• Hierarchical DBMS. …
• Network DBMS. …
• Object-Oriented DBMS.

Some common examples of reconnaissance attacks include packet sniffing, ping sweeps, port scanning, phishing, social engineering, and internet information queries. It is worth noting that these attacks can be preventable as well. These can be examined further by breaking them into two categories: Logical, and Physical.