ICND1 Study Guide 2026
Everything you need to pass the ICND1 exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 ICND1 Exam Format at a Glance
📚 ICND1 Topics to Study (68)
✍️ Sample ICND1 Questions & Answers
1. Which statement best describes a Switched Virtual Interface (SVI)?
An SVI is a virtual Layer 3 interface on a multilayer switch tied to a VLAN, providing a gateway IP address for hosts in that VLAN.
2. How many IPv4 addresses does a /23 subnet contain in total?
A /23 has 9 host bits, so 2^9 = 512 total addresses (510 usable hosts).
3. What is the valid host range for the subnet 192.168.10.64/26?
A /26 has 64 addresses; network=.64, broadcast=.127, so valid hosts are .65 through .126.
4. Which professional attribute is most valued in subnetting within the ICND1 field?
Accountability and commitment to professional standards build trust and ensure consistent, high-quality practice.
5. How does the ICND1 body of knowledge relate to daily professional practice?
The body of knowledge provides the foundational framework of principles, standards, and best practices that professionals use to guide their daily decision-making, ensure consistent quality, and maintain alignment with industry standards.
6. What is the default OSPF hello interval on a broadcast multi-access network?
The default OSPF Hello interval on broadcast and point-to-point links is 10 seconds.