- How the RNS Blueprint Is Built
- The Five Domains at a Glance
- Domain 1: Network Design & Documentation (35%)
- Domain 4: Wireless Networking (20%)
- Domains 2, 3 and 5: The 15% Trio
- Objectives That Reward Specific Preparation
- Sequencing Your Preparation by Domain
- Official Resources Mapped to Domains
- Exam Mechanics That Affect Your Domain Strategy
- Frequently Asked Questions
- The RNS blueprint has five domains; Network Design & Documentation is largest at 35%, followed by Wireless Networking at 20%.
- The exam is 150 multiple-choice and multiple-select questions in three hours; you need 68% (102 of 150) to pass.
- Domains 2, 3 and 5 are each 15%, so no single smaller domain can be ignored safely.
- Blueprint objectives name IPv6, discovery protocols, timing-aware AV networks and NIST 2.0 explicitly.
How the RNS Blueprint Is Built
The Residential Networking Specialist (RNS) certification is issued by CEDIA, with oversight from the CEDIA Certification Commission. Everything on the exam traces back to one document: the CEDIA Residential Networking Specialist Exam Blueprint, dated April 15, 2024 and marked effective September 1, 2024. The five domains and their percentages in that document are official examination objectives and weights, not editorial groupings invented by a prep provider.
That distinction matters for how you study. The blueprint describes residential networking as practiced by integrators: planning and documenting a home network, powering devices over Ethernet, moving AV over IP, segmenting traffic, verifying that it all works, surveying and tuning wireless, and securing the result. It is not a generic enterprise networking exam. If you are new to the credential itself, start with What Is RNS Certification? and then return here for the domain-level detail.
The Five Domains at a Glance
CEDIA publishes both percentages and item allocations. The percentages are the official weights; the item counts are rounded allocations of the 150 questions. Rather than recalculating percentages from the rounded counts, use the percentages as the issuer states them.
| Domain | Official Weight | Published Item Allocation |
|---|---|---|
| 1. Network Design & Documentation | 35% | 53 |
| 2. Network Configuration | 15% | 22 |
| 3. Network Troubleshooting & Verification | 15% | 22 |
| 4. Wireless Networking | 20% | 31 |
| 5. Network Security | 15% | 22 |
Two domains, Design & Documentation and Wireless, together account for 55% of the exam. Many candidates, especially working technicians who spend their days configuring and troubleshooting, instinctively over-study Domains 2 and 3 because that is what they do on job sites. The weights suggest a different allocation of effort. For a broader view of how this fits into overall difficulty, see How Hard Is the RNS Exam?
Domain 1: Network Design & Documentation (35%)
This is the heaviest domain by a wide margin, and it is where the exam's residential-integrator flavor is strongest. The questions test whether you can plan a network before anything is installed and record it so someone else can support it afterward.
Domain 1: Network Design & Documentation
Expect scenario-driven questions about planning a home network for a given set of subsystems, then documenting that plan.
- Residential network planning: sizing the network around the number and type of devices, subsystems and expected traffic
- Documentation: the records an integrator produces so a network can be supported, handed over and audited later
- PoE power budgets: calculating whether a switch can power the connected cameras, access points and other powered devices
- Bandwidth planning: estimating load from video, audio and general household use
- AV-over-IP and multicast: how audio and video distribution behaves on a network and what the switching layer must support
- VLAN and QoS planning as design decisions, not just configuration steps
Why PoE and bandwidth math deserves practice
Because the blueprint calls out PoE power budgets and bandwidth explicitly, expect questions that require reasoning with numbers rather than recalling definitions. Practice working through budgets by hand: total available switch power versus the sum of device draw, then what happens when you add one more powered device. Questions in a multiple-select format often hide the right answer in an overlooked constraint, such as a per-port limit versus a total switch budget.
AV-over-IP and multicast as a design problem
Multicast appears in the preparation topics, and it is a classic place where residential AV and networking knowledge intersect. Understand why AV-over-IP distribution can overwhelm a flat network, what a switch needs to do to contain multicast traffic, and how design choices upstream prevent troubleshooting headaches downstream. The blueprint also references timing-aware AV networks, so do not treat AV-over-IP as a single bullet; it threads through design, configuration and verification.
Domain 4: Wireless Networking (20%)
Wireless is the second-largest domain, and the blueprint's preparation topics specifically name wireless site assessment. In a residential context, that means thinking about how a house's construction, layout and occupant behavior shape coverage and capacity.
Domain 4: Wireless Networking
Wireless questions favor practical placement and assessment reasoning over memorized standards trivia.
- Site assessment: gathering information about the property and its radio environment before deciding on equipment and placement
- Coverage versus capacity: why a house can have signal everywhere and still perform poorly under load
- Access point placement and wired backhaul considerations, including how PoE ties wireless back to Domain 1
- Interference and channel planning in dense residential environments
- Client behavior: roaming, device density and how many connected devices a modern home carries
Notice how often the domains overlap. A wireless question can pull in PoE budgeting from Domain 1, VLAN placement from Domain 2 and security configuration from Domain 5. Studying each domain in isolation will leave gaps; build a habit of asking how a given topic touches the others.
Domains 2, 3 and 5: The 15% Trio
Network Configuration, Network Troubleshooting & Verification and Network Security each carry 15%, or 22 items apiece in the published allocation. Individually they are smaller than Design or Wireless, but together they make up 45% of the exam. Skipping one of them to focus on the big two is a poor trade.
Domain 2: Network Configuration (15%)
Implementing the design on real equipment.
- VLANs: creating, assigning and trunking them so subsystems stay separated appropriately
- QoS: prioritizing latency-sensitive traffic such as AV streams
- Multicast-related switch settings that support AV-over-IP
- IPv6 handling, which the blueprint names explicitly
- Discovery protocols and how devices find one another on segmented networks
Domain 3: Network Troubleshooting & Verification (15%)
Proving the network works, and finding the fault when it does not.
- Systematic fault isolation: narrowing a symptom to a layer, segment or device
- Verification after installation: confirming that the configured behavior matches the documented design
- Reading symptoms that point to PoE shortfalls, multicast flooding, VLAN misassignment or wireless interference
- Timing-aware AV network issues, where problems may not look like simple connectivity failures
Domain 5: Network Security (15%)
Protecting residential networks and the client data and devices on them.
- Network segmentation as a security control, not just a performance tool
- Securing wireless and wired access in a client's home
- Alignment with NIST 2.0, which the blueprint calls out as an explicit objective
- Practical hardening choices an integrator can make and explain to a homeowner
Objectives That Reward Specific Preparation
Four items stand out in the blueprint because they are named explicitly rather than implied: IPv6, discovery protocols, timing-aware AV networks and NIST 2.0. These are exactly the places where a candidate with strong general networking experience can still be caught off guard, because day-to-day residential work may never touch them.
- IPv6: Be comfortable with its addressing and how it coexists with IPv4 on a residential network.
- Discovery protocols: Understand how devices announce and find services, and why discovery can break across VLANs.
- Timing-aware AV networks: Know why synchronization matters for AV distribution and what the network must provide.
- NIST 2.0: Review the framework at a conceptual level so you can recognize how its ideas apply to a home network.
Sequencing Your Preparation by Domain
You do not need an elaborate method here, just a sensible order. Because Design & Documentation underpins everything else, start there, then layer configuration and wireless on top, and finish with troubleshooting and security, which both reward integrated understanding. Adjust the pacing to your own schedule and prior experience; for a fuller plan, see the RNS Study Guide.
Design & Documentation (35%)
- Work PoE budget and bandwidth calculations by hand
- Study AV-over-IP and multicast design implications
- Review what residential network documentation should contain
Configuration and Wireless (15% + 20%)
- Cover VLANs, QoS, IPv6 and discovery protocols
- Study wireless site assessment and placement reasoning
- Connect wireless backhaul back to PoE budgets
Troubleshooting and Security (15% + 15%)
- Practice symptom-to-cause reasoning across layers
- Review NIST 2.0 concepts and segmentation as security
- Take a full-length timed practice run and review misses by domain
Key Takeaway
Track your practice results by domain, not just as one overall score. A weak 15% domain can cost you as many items as a weak 20% one, and the 68% threshold (102 of 150) leaves limited room to write off any area. Our RNS practice tests are organized to help you see exactly where your gaps are.
Official Resources Mapped to Domains
CEDIA publishes its own preparation resources, and mapping them to the domains helps you avoid wasted effort. The published materials include the networking chapter of the Integrated Systems Technician book, chapters 10 through 12 of Advanced Residential Electronic Systems, relevant networking and security courses and white papers, and two official practice-test modes: one with answers and one without.
- Design and configuration foundations: the ISTbook networking chapter and the Advanced Residential Electronic Systems chapters are the natural starting points.
- Security: CEDIA's security-focused courses and white papers align with Domain 5.
- Self-assessment: use the practice-test mode without answers first, then the mode with answers to learn from misses.
CEDIA states that sample questions are not actual test questions and do not necessarily predict examination performance. Use them to find weak areas, not to forecast a pass. For more on structured training options, see RNS Training.
Exam Mechanics That Affect Your Domain Strategy
A few logistics shape how you should approach the domains on test day.
- Time: three hours for 150 questions leaves roughly a minute and a half per item on average, so calculation-heavy Domain 1 questions deserve disciplined pacing.
- No study materials: you cannot look up PoE formulas or framework details, so memorize the working relationships you need.
- Question types: multiple-select items require you to identify every correct option, which is why partial understanding is risky.
- Delivery: CEDIA supplies a voucher and instructions for scheduling through Kryterion/Webassessor, with remote online proctoring or a Kryterion test center as options.
- Fees: the US exam fee is $200 for CEDIA members and $300 regular. Retest-fee listings conflict between sources, so confirm the applicable charge when booking. See the RNS certification cost breakdown for details.
- Prerequisites: there are none mandatory; three years of related networking experience or IST certification is recommended, not required. Candidates must accept the Certification Code of Conduct. More in RNS Requirements.
On outcomes, CEDIA's program administration page reports a pooled 52% averaged pass rate across 147 combined RNS and legacy ESC-N candidates over the preceding three years as of December 31, 2025. That figure blends the current and legacy exams and is not an RNS-only or first-attempt rate, so read it as context rather than a prediction. The RNS pass rate article covers how to interpret it. Once certified, the credential is valid for three years and renews with at least 30 CEUs plus agreement to the conduct code; CEDIA currently lists no renewal application or fee for RNS, though policies can change.
When you are ready to test your domain knowledge under timed conditions, the RNS Exam Prep practice test site offers questions built around these five areas.
Frequently Asked Questions
They are Network Design & Documentation (35%), Network Configuration (15%), Network Troubleshooting & Verification (15%), Wireless Networking (20%) and Network Security (15%). These come from the CEDIA blueprint dated April 15, 2024, effective September 1, 2024.
Network Design & Documentation carries the most weight at 35%, with 53 published items, and it feeds into the other domains. Wireless Networking at 20% is next. Still, the three 15% domains together make up 45% of the exam, so none can be skipped.
The passing score is 68%, which is 102 of 150 questions. The exam is three hours long with multiple-choice and multiple-select questions and no study materials allowed. See RNS Passing Score for more.
Not as a stated goal. The blueprint centers on residential planning and documentation, PoE budgets and bandwidth, AV-over-IP and multicast, VLANs and QoS, troubleshooting and verification, wireless site assessment and network security. Explicit objectives include IPv6, discovery protocols, timing-aware AV networks and NIST 2.0.
The RNS is a distinct credential from the legacy ESC-N, which stopped being offered on September 1, 2024. Use the current RNS blueprint for preparation rather than older ESC-N materials. For orientation on the credential, read What Is RNS?