Explanation
EAP-FAST (Extensible Authentication Protocol-Flexible Authentication via Secure Tunneling) supports mutual authentication and is designed to simplify the deployment of strong, password-based authentication.
EAP-FAST includes a mechanism for detecting rogue access points. References:
CompTIA Security+ Study Guide Exam SY0-601, Chapter 4

Explanation
A digital certificate is an electronic document that contains the public key and identity information of an entity, such as a person, organization, website, etc. It is issued and signed by a trusted authority called a certificate authority (CA). It can provide non-repudiation by proving the identity and authenticity of the sender and verifying the integrity of the message or data.

Explanation
laaS (Infrastructure as a Service) allows the creation of virtual networks, automation, and scripting to reduce the area utilized in a datacenter. References: CompTIA Security+ Study Guide, Exam SY0-601, Chapter 4

Explanation
Facial recognition is a type of biometric authentication that uses the unique features of a person's face to verify their identity. Facial recognition is not something you know or have, but something you are, which is one of the three factors of authentication. Facial recognition can use various methods and technologies, such as
2D or 3D images, infrared sensors, machine learning and more, to capture, analyze and compare facial data.
Facial recognition can provide a convenient and secure way to authenticate users on personal mobile devices, as it does not require any additional hardware or input from the user. Facial recognition can also be used in conjunction with other factors, such as passwords or tokens, to provide multi-factor authentication. Verified References:
Biometrics - SY0-601 CompTIA Security+ : 2.4 - Professor Messer IT Certification Training Courses
https://www.professormesser.com/security-plus/sy0-601/sy0-601-video/biometrics/ (See Facial Recognition) Security+ (Plus) Certification | CompTIA IT Certifications
https://www.comptia.org/certifications/security (See Domain 2: Architecture and Design, Objective 2.4:
Given a scenario, implement identity and access management controls.)
Biometric and Facial Recognition - CompTIA Security+ Certification (SY0-501)
https://www.oreilly.com/library/view/comptia-security-certification/9781789953091/video9_6.html (See Biometric and Facial Recognition)