Which three descriptions apply to a perimeter firewall? (Choose three.)

A perimeter firewall is traditionally deployed at the boundary of a network to protect it from external

threats. It provides a variety of protections, including blocking unauthorized access, inspecting traffic

flows, and safeguarding sensitive resources. Here is how the options apply:

Option A (Correct): Perimeter firewalls provide network layer protection by filtering and inspecting

traffic entering or leaving the network at the outer edge. This is one of their primary roles.

Option B: Power utilization is not a functional or architectural aspect of a firewall and is irrelevant

when describing the purpose of a perimeter firewall.

Option C: Securing east-west traffic is more aligned with data center firewalls, which monitor lateral

(east-west) movement of traffic within a virtualized or segmented environment. A perimeter firewall

focuses on north-south traffic instead.

Option D (Correct): A perimeter firewall primarily secures north-south traffic, which refers to traffic

entering and leaving the network. It ensures that inbound and outbound traffic adheres to security

policies.

Option E (Correct): Perimeter firewalls play a critical role in guarding against external attacks, such as

DDoS attacks, malicious IP traffic, and other unauthorized access attempts.

Reference:

Palo Alto Networks Firewall Deployment Use Cases: https://docs.paloaltonetworks.com

Security Reference Architecture for North-South Traffic Control.