The IT administrator wants to implement a stronger security policy. What are the four most

Securing communications between remote offices and headquarters protects sensitive data traversing untrusted public networks, representing a fundamental perimeter security requirement.

Implementing Certificate Services on one specific office is a narrow infrastructure task, not a broad organizational security policy priority.

Portable computers present a direct physical theft risk, making data-at-rest encryption and protection a critical policy priority that addresses a high-probability loss scenario.

Two-factor authentication is a specific implementation mechanism that falls under the broader policy goal of ensuring secure authentication covered by choice E.

Ensuring secure authentication is foundational to all access control - without it, any other security control can be bypassed by an attacker who gains unauthorized identity.

Preventing unauthorized network access enforces the principle of least privilege at the network boundary and is a core security policy requirement for any organization.

Securing communications between one specific branch and headquarters is a subset of the broader remote office communication security addressed by choice A.

Preventing denial-of-service attacks, while valid, is a reactive and lower-priority hardening concern compared to the foundational access control and authentication priorities.