Chapter 5

1. There are two areas that Spring Security mainly targets, and these are authentication and authorization.
2. The SecurityContext and SecurityContextHolder classes, which are Spring security.
3. The DelegatingFilterProxy class is required for Spring security, and this class is from package org.springframework. web.filter.

4. Yes. Spring Security supports password hashing.
5. Authorization Code, Implicit, Password, Client Credentials, Device Code, Refresh Token.