About This Domain
Domain 4 — IP Services — accounts for 10% of the CCNA certification exam. This domain evaluates your understanding of configure and verify inside source nat using static and pools, configure and verify ntp operating in client and server mode, explain the role of dhcp and dns within the network, and related concepts. Domain 4 covers NTP, DHCP, DNS, SNMP, Syslog, QoS, and other essential IP services. To pass this section you need practical knowledge of how these services and patterns work together in real-world architectures.
What You'll Be Tested On
- Configure and verify inside source NAT using static and pools
- Configure and verify NTP operating in client and server mode
- Explain the role of DHCP and DNS within the network
- Explain the function of SNMP in network operations
- Describe the use of syslog features including facilities and severity levels
- Explain per-hop QoS behavior (classification, marking, queuing)
Key Cisco Technologies in This Domain
Study Strategy for Domain 4
While 10% might seem like a smaller portion of the exam, every point counts toward the passing score. Focus on understanding core concepts and common exam scenarios for this domain.
Exam Tips for Domain 4
Syslog severity levels: 0 (Emergency) to 7 (Debugging) — lower number = more severe.
SNMP versions: v1 (community strings, no encryption), v2c (bulk retrieval), v3 (authentication + encryption).
NTP stratum: 0 is the reference clock, stratum 1 is directly connected to it.
PAT (NAT overload) is the most common NAT type — maps many private IPs to one public IP.
Frequently Asked Questions
How many questions on the CCNA exam come from Domain 4?
Domain 4 (IP Services) makes up 10% of the CCNA exam. The exam has 65 scored questions, so approximately 7 questions will come from this domain.
What services should I focus on for Domain 4?
The key services for this domain include DHCP, NAT, IP Services, QoS. Make sure you understand how each service works, its use cases, and how they integrate with one another.
How should I prepare for IP Services questions?
Start by reviewing the key topics listed above, then practice with domain-specific questions. Focus on understanding real-world scenarios rather than memorizing facts.
What's the best order to study the CCNA domains?
Many candidates start with the highest-weighted domains first. For the CCNA exam, the domains in order of weight are: Network Fundamentals (20%), Network Access (20%), IP Connectivity (25%), IP Services (10%), Security Fundamentals (15%), Automation and Programmability (10%).
Practice Domain 4 Questions
Test your knowledge of IP Services with practice questions from our CCNA question bank.
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