ISC2 CC Network Security Practice Question
Which firewall type inspects the entire packet, including application data, and can enforce rules based on user identity?
⚠ Common exam trap
The trap is assuming 'application proxy firewall' equals 'NGFW' because both inspect application data — but the CC exam distinguishes that only NGFW adds user-identity-based enforcement and integrated Layer 7 inspection across all applications.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Next-generation firewall (NGFW)
A Next-Generation Firewall (NGFW) goes beyond traditional port/protocol inspection by performing deep packet inspection (DPI) up to Layer 7, identifying applications regardless of port, and integrating user identity awareness (via LDAP, Active Directory, or captive portal) to enforce policies based on who the user is. It combines stateful inspection, application control, IPS, and identity-based rules in a single platform. This matches the question's requirement of inspecting application data and enforcing rules based on user identity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Application proxy firewall
Why it's wrong here
An application proxy terminates and inspects application-layer traffic, but it does not enforce rules on user identity; that requires a next-generation firewall integrating directory-based identity awareness. Application proxies suit deep content filtering and caching, not identity-driven policy enforcement.
- ✗
Packet filtering firewall
Why it's wrong here
Packet filtering firewalls inspect only packet headers, such as source and destination addresses and ports, and cannot read application data or identify users. Full-packet inspection with identity-based rules requires a next-generation firewall. Packet filtering suits basic perimeter ACLs where only address and port criteria matter.
- ✓
Next-generation firewall (NGFW)
Why this is correct
A next-generation firewall performs deep packet inspection, examining payload and application-layer data rather than only headers and ports. It also integrates with directory services to enforce rules based on user identity, satisfying both constraints in the stem, unlike packet-filtering or stateful inspection firewalls.
- ✗
Stateful inspection firewall
Why it's wrong here
Stateful inspection tracks connection state across packets but examines headers rather than full application payloads, and it cannot enforce rules based on user identity. A next-generation firewall adds deep packet inspection and identity awareness. Stateful inspection suits environments needing session tracking without application-layer or user-based control.
Go deeper
Related to this question
Learn chapter
Security Awareness and Training
Key term
Lightweight Directory Access Protocol
Lightweight Directory Access Protocol (LDAP) is a standard protocol used to access and manage directory information over a network, such as user credentials and permissions.
Key term
IPS
An Intrusion Prevention System (IPS) is a network security device that monitors traffic in real time and automatically blocks threats before they reach your systems.
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One of 989 original CC practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official ISC2 exam blueprint
This CC practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CC exam.