Important: Qs & As are reference materials for exam preparation. You will receive the latest available version at the time of delivery. Please check the description before ordering.
EC-Council Certified Network Defender (CND / 312-38)
Certified Network Defender, commonly known as CND, is an EC-Council defensive-security certification. It focuses on the work required to protect an organization's networked environment: understand assets and exposure, apply controls, monitor for suspicious behavior, respond to incidents and restore services safely. Its orientation is blue-team operations rather than offensive testing.
Use EC-Council's official Certified Network Defender page and the current program documentation to verify the active exam code, objectives, delivery route and enrollment requirements.
What CND is designed to develop
Network security foundations
Defensive work begins with an accurate understanding of the environment: assets, users, data flows, trust boundaries, network segments and business services. Study how security objectives such as confidentiality, integrity and availability guide network design and operational priorities. A control is meaningful only when it protects a defined asset against a realistic risk and can be operated by the team responsible for it.
Secure configuration and hardening
Networks are safer when unnecessary exposure is removed and expected behavior is explicit. Learn baseline configuration, segmentation, secure administration, patch and firmware management, access control, encryption, certificate handling and endpoint coordination. Hardening should be repeatable and documented so that a secure setting does not disappear after a replacement, upgrade or urgent change.
Monitoring and threat detection
Detection depends on useful telemetry. Review logs, network events, authentication activity, endpoint signals, configuration changes and service health. The goal is to establish a baseline and identify deviations that require investigation. Alerts should be triaged with context: affected asset, user, time, expected behavior, recent changes and potential business impact.
Incident response and recovery
When an event is confirmed, a team needs a disciplined response: assess, contain, preserve evidence, eradicate the cause, recover services and improve controls. A response plan should define roles, communications, escalation, legal or privacy considerations and recovery validation. Restoring a service is not the end of an incident; the organization also needs to understand why controls failed or detection was delayed.
Security operations and continuous improvement
Operational security includes vulnerability management, change control, backups, access reviews, risk tracking, testing, awareness and documentation. Improvements should be driven by evidence from incidents, audits, monitoring and service changes. This makes security an ongoing operational capability rather than a once-a-year project.
Who should study CND
CND is relevant to network administrators, security operations analysts, infrastructure engineers and IT support professionals with defensive responsibilities. It helps candidates connect network knowledge to detection, response and service recovery, especially in organizations where operations teams share security ownership.
A defensive learning plan
- Document a small environment's assets, data flows, identities and network segments.
- Apply an approved baseline to a lab network, including secure administration and log collection.
- Define normal activity, then investigate a controlled anomaly using evidence rather than assumptions.
- Write an incident runbook for a scenario such as a compromised account or suspicious network connection.
- Test recovery for one important service and record the time, data impact, decision points and follow-up improvements.
How to use practice questions
Read each scenario from the defender's perspective: what asset is affected, what evidence exists, what immediate action limits harm, and what process preserves the ability to recover and learn? Favor answers that respect scope, minimize disruption and create an auditable path to resolution.
Before scheduling
Confirm the active CND program name, current 312-38 scope, delivery conditions, identification rules and regional price directly with EC-Council. Historic question counts, duration and passing-score claims may no longer apply.
Frequently asked questions
Is CND an offensive security course?
No. It is centered on defensive network security, monitoring, incident response and recovery.
Does it require hands-on practice?
Hands-on work in an authorized lab helps make monitoring, hardening and incident workflows concrete.
Where can I verify current details?
Use EC-Council's Certified Network Defender page and the current program documentation.