Associated ted to a System Authentication Process, answer in a brief manner the following questions 1.- What is an authentication process? 2.- Explain how the shadow password file is used in a Linux System? 3.- Explain how a password cracking-software works and how a good administration of the system can avoid this attack for a Linux System. 4.- List some important recommendations for the creation of a secure password. 5.- What is a dual-factor authentication (2FA) protocol?. 6.- Define a high secure Multi-Factor Authentication (MFA) protocol with three layers of security for accessing to your bank account