A high-availability network is a network that is designed to minimize downtime and ensure continuous operation of critical services and applications. To achieve this goal, a high-availability network must consider two important factors: ease of recovery and attack surface.
Ease of recovery refers to the ability of a network to quickly restore normal functionality after a failure, disruption, or disaster. A high-availability network should have mechanisms such as redundancy, failover, backup, and restore to ensure that any single point of failure does not cause a complete network outage. A high-availability network should also have procedures and policies for incident response, disaster recovery, and business continuity to minimize the impact of any network issue on the organization's operations and reputation.
Attack surface refers to the exposure of a network to potential threats and vulnerabilities. A high-availability network should have measures such as encryption, authentication, authorization, firewall, intrusion detection and prevention, and patch management to protect the network from unauthorized access, data breaches, malware, denial-of-service attacks, and other cyberattacks. A high-availability network should also have processes and tools for risk assessment, threat intelligence, vulnerability scanning, and penetration testing to identify and mitigate any weaknesses or gaps in the network security.
References: CompTIA Security+ Study Guide: Exam SY0-701, 9th Edition, Chapter 4: Architecture and Design, pages 164-1651. CompTIA Security+ Certification Kit: Exam SY0-701, 7th Edition, Chapter 4:
Architecture and Design, pages 164-1652.

Rolling out mobile device management on COPE devices primarily addresses unsupported applications.
COPE means corporate-owned, personally enabled, so the organization owns the device but allows some personal use. MDM allows administrators to enforce application control, push approved applications, block unauthorized apps, manage configurations, enforce encryption, require screen locks, and remotely wipe corporate data. Malware outbreaks and phishing attacks may be indirectly reduced through policy enforcement, but MDM is not primarily an anti-malware or anti-phishing tool. Data masking is a data protection technique that hides sensitive values and is unrelated to managing mobile device software. In Security+ terms, MDM is used to manage mobile endpoints and enforce corporate policy, including preventing unsupported or unapproved applications.

Integrating each SaaS solution with an Identity Provider (IdP) is the most effective way to address the security issue. This approach allows for Single Sign-On (SSO) capabilities, where users can access multiple SaaS applications with a single set of credentials while maintaining strong password policies across all services. It simplifies the user experience and ensures consistent security enforcement across different SaaS platforms.
References =
* CompTIA Security+ SY0-701 Course Content: Domain 05 Security Program Management and Oversight.
* CompTIA Security+ SY0-601 Study Guide: Chapter on Identity and Access Management.

LDAP authentication on the printer (C)would require users toauthenticate before printing, enablingsecure print release. This ensures that documents arenot printed until the authorized user is physically present, which directly addresses the issue of missing confidential documents.
As perCompTIA Security+ SY0-701, Domain 3.1 (Access management), integratingauthentication mechanisms like LDAPimproves physical and document security in shared environments.
Reference: CompTIA Security+ SY0-701 Objectives, Domain 3.1 - "Access management: Authentication mechanisms (e.g., LDAP)."