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Updated: Aug 28, 2026
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Cisco 642-551 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Securing Cisco Network Devices (SND) |
| Exam Number: | 642-551 |
| Available Languages: | English |
| Certificate Validity Period: | 3 years (Cisco certification validity standard) |
| Passing Score: | Cisco scaled score (typically ~800/1000, may vary) |
| Real Exam Qty: | 45-55 (varies) |
| Exam Format: | Multiple choice, Multiple response, Simulation / scenario-based questions |
| Exam Price: | USD 250 (historical Pearson VUE pricing; may vary by region) |
| Exam Duration: | 90 minutes |
| Related Certifications: | Cisco Certified Network Professional (CCNP Security) Cisco Certified Network Associate (CCNA) |
| Recommended Training: | Cisco Official Training (Legacy SND / Security Fundamentals courses) Cisco Learning Network |
| Exam Registration: | Cisco Certification Exams (Pearson VUE Registration) Cisco Training & Certifications Portal |
| Sample Questions: | Cisco 642-551 Sample Questions |
| Exam Way: | Delivered via Pearson VUE testing centers (onsite or authorized remote proctoring where available) |
| Pre Condition: | Recommended Cisco CCNA-level networking knowledge or equivalent experience |
| Official Syllabus URL: | https://www.cisco.com/site/us/en/learn/training-certifications.html |
Cisco 642-551 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Secure Network Management | - Secure management protocols (SSH, HTTPS, SNMPv3) - Logging and monitoring security events |
| Network Security Fundamentals | - Security concepts and threat types - Security policies and risk mitigation |
| Cisco Device Security Features | - IOS Firewall features - Basic IPS/IDS concepts on Cisco devices |
| Securing Cisco IOS Devices | - Device hardening and secure configuration - IOS password security and privilege levels |
| Access Control and Authentication | - AAA (Authentication, Authorization, Accounting) - ACL configuration and implementation |
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