What are the different types of penetration testing methods?

There are different types of penetration testing methods:
External testing:  It targets a company’s externally visible servers or DNS, E-mail servers, Web servers or firewalls.
Internal Testing: Inside attack behind the firewall by an authorized user with standard access privileges.
Blind Testing: In a blind test, a tester is only given the name of the enterprise that’s being targeted. This gives security personnel a real-time look into how an actual application assault would take place.
Double blind testing:  In this testing security personnel have no prior knowledge of the simulated attack. Double-blind tests can be useful for testing an organization’s security monitoring and incident identification as well as its response procedures.
Target Testing: Targeted testing or the lights-turned-on approach as it is often referred to, involves both the organization’s IT team and the penetration testing team to carry out the test.