Misgivings are healthy; buy nothing until they are gone. Prep4SureReview removes them with evidence: a free demo drawn from the real 400-251 bank, so you can judge the Cisco CCIE Security Written Exam (v5.0) content yourself before deciding in 2026.
Cisco 400-251 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | CCIE Security Written Exam (v5.0) |
| Exam Number: | 400-251 |
| Related Certifications: | CCIE Security Lab Exam (v5.0) |
| Available Languages: | English |
| Exam Price: | $400 USD |
| Exam Duration: | 120 minutes |
| Exam Format: | Scenario-Based, Multiple Choice Single Answer, Multiple Choice Multiple Answer, Drag and Drop |
| Passing Score: | 804 / 1000 |
| Real Exam Qty: | 90-110 |
| Certificate Validity Period: | 18 months from passing written exam |
| Recommended Training: | CCIE Security v5.0 Exam Topics PDF Cisco Official Training |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: |  |
| Exam Way: | Online proctored or onsite at Pearson VUE test centers; retired since February 23, 2020 |
| Pre Condition: | No formal prerequisites; recommended 5-7 years of professional security experience |
| Official Syllabus URL: | https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/400-251-ccie-security.html |
Cisco 400-251 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Identity Management, Information Exchange, and Access Control | 22% | - AAA services and 802.1X/MAB - TrustSec and SGT architecture - Cisco ISE and ACS deployment - Guest and BYOD access lifecycle |
| Topic 2: Perimeter Security and Intrusion Prevention | 21% | - Cisco ASA and Firepower Threat Defense deployment modes - Firewall features: NAT, inspection, zones, routing - Intrusion prevention and threat detection - High availability and clustering |
| Topic 3: Evolving Technologies v1.1 | 10% | - Cloud security architectures - IoT security considerations - Emerging security trends and solutions - SDN and software-defined security |
| Topic 4: Secure Connectivity and Segmentation | 17% | - IPsec and SSL VPN technologies - DMVPN and GET VPN - Network segmentation and micro-segmentation - Secure routing protocols |
| Topic 5: Advanced Threat Protection and Content Security | 17% | - Threat intelligence integration - Content filtering and security controls - Email security and web security solutions - Advanced Malware Protection (AMP) |
| Topic 6: Infrastructure Security, Virtualization, and Automation | 13% | - Logging, monitoring, and reporting - Security for virtualized environments - Device hardening and control plane security - Network automation and APIs |
From Anxiety to Action: 400-251 Facts You Need
Per the latest exam information, the 400-251 exam presents 90-110 questions in 120 minutes minutes. Knowing the format precisely removes one major source of exam-day anxiety.
By replacing uncertainty with evidence at every step. Anxious about quality? The free demo is drawn from the real 400-251 bank, so you get a genuine preview before paying. Anxious about difficulty? Every answer is expert-verified, compiled conscientiously by our top specialists across the Cisco CCIE Security Written Exam (v5.0) objectives. Anxious about fit? Three versions — PDF, PC engine, and online engine — let you choose whichever suits your habits. And we are never self-satisfied: quality and service keep improving, release after release.
Upon successful payment, our system automatically emails the product to your mailbox — typically within about a minute — with an instant download link on screen. If nothing arrives within two hours, check your spam folder and contact support. Installations are unlimited, and updates are free for 365 days: each new version is delivered automatically, with a 50% renewal discount when the period ends.
Cisco recommends the following official training resources:
Choose a course that matches your starting point, then reinforce it with steady question practice.
The Cisco CCIE Security Written Exam (v5.0) blueprint covers these core domains:
- Infrastructure Security, Virtualization, and Automation (13%)
- Evolving Technologies v1.1 (10%)
- Advanced Threat Protection and Content Security (17%)
The official outline lists further domains, all covered in our question bank.
Cisco publishes these prerequisites for the Cisco CCIE Security Written Exam (v5.0): No formal prerequisites; recommended 5-7 years of professional security experience.
Check the authoritative wording on the official certification page before registering.
At present, passing the 400-251 exam requires 804 / 1000, and the registration fee is $400 USD. Both are set by Cisco and can change — confirm them on the official site when you book.
Use the official registration channels below:
Select a test center or online session, and secure your date early for the best availability.
Written, clear, and honored. If you fail the corresponding exam within 60 days of purchase, send us a scanned copy of your enrollment slip and your official Score Report PDF within two days of the exam date; verified claims are refunded in full within seven days. Exclusions: exams taken within three days of purchase, candidate names that differ from the payer, and free or expired products. If you prefer, exchange your product for two others of equal value at no charge.
Cisco CCIE Security Written Exam (v5.0) Sample Questions:
Which ports need to be enabled outbound in order to integrate Cisco Email Security Appliance ESA with Cisco's APM & Threatgrid Cloud services?
- A. TCP 32137 only to File Reputation Server TCP 443 to File Analysis Server
- B. TCP 443 or 32137 to File Reputation server TCP 443 to File Analysis Server
- C. TCP 32137 to both File Reputation and File Analysis Servers
- D. TCP to 443 to both File Reputation and File Analysis Servers
Correct Answer: B 🗳️
Which statement about OSPFv2 configuration on ASA is true?
- A. It only supports MD5 authentication with the peers
- B. It does not support stub areas and not-so-stubby areas
- C. It allows multiple routing processes to be configured
- D. It does not support virtual links
- E. Routing decision is based on the hop counts to the destination
- F. ASA can exist as ABR but not as ASBR
Correct Answer: C 🗳️
RFID is a technology widely used in loT networks today. Which two features of RFID technologies are correct? (Choose two)
- A. RFID tag collision results in an increase of identification delays
- B. RFID uses CDMA and CSMA for the prevention of collisions on RFID systems
- C. Semi-passive tags have an on-board power source which is used to energize microchips
- D. RFID readers do not require anti-collision protocols to minimize collisions
- E. RFID readers can suffer from a lack of sufficient memory and computational resources
Correct Answer: A,C 🗳️
If a packet capture is taken between ISE and an endpoint to capture an EAP-TLS session, you will be able to see:
- A. Certificate and associated private keys from ISE only
- B. Certificates from ISE and the endpoint
- C. Certificate and associated private keys from endpoint only
- D. Certificates from ISE only
Correct Answer: B 🗳️
Which function of MSE in the WIPS architecture is true?
- A. detects rogue Aps
- B. channel to connect with ISE to implement CoA
- C. scans channels without impacting data-serving radios
- D. performs the correlation of security events
- E. applies rogue policy to mitigate rogue threats
- F. detects over-the-air traffic network anomalies and attacks
- G. provides view of security threats
Correct Answer: D 🗳️
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