- The RNS Exam at a Glance
- Domain Weights: Where the Points Live
- Domain 1 Cheat Sheet: Design & Documentation
- Domain 2 Cheat Sheet: Network Configuration
- Domain 3 Cheat Sheet: Troubleshooting & Verification
- Domain 4 Cheat Sheet: Wireless Networking
- Domain 5 Cheat Sheet: Network Security
- Fees, Scheduling and Renewal Quick Reference
- Numbers You Should Treat With Care
- Scheduling Domains Across Your Prep Weeks
- RNS Cheat Sheet FAQ
- The RNS exam has 150 multiple-choice and multiple-select questions in three hours, with no study materials allowed.
- A passing score is 68%, which means 102 of 150 questions correct.
- Network Design & Documentation is the heaviest domain at 35%; Wireless Networking follows at 20%.
- Exam fee is $200 for CEDIA members and $300 regular; confirm the retest charge when booking.
The RNS Exam at a Glance
This page condenses the Residential Networking Specialist (RNS) certification from the Custom Electronic Design and Installation Association (CEDIA) into a single scannable reference. It covers the format, the five weighted domains, the money and scheduling mechanics, and the specific technical topics the blueprint names. If you want the long-form version of any section, the links throughout point to deeper articles, including the full RNS study guide.
The credential is overseen by the CEDIA Certification Commission. It is a distinct credential from CEDIA's IST certification and from the retired ESC-N examination, so keep those separate when you read forum posts or older study notes.
| Item | RNS Fact |
|---|---|
| Issuer | CEDIA (Certification Commission oversight) |
| Question count | 150 multiple-choice and multiple-select |
| Time allowed | 3 hours |
| Study materials during exam | None permitted |
| Passing score | 68% (102 of 150) |
| Prerequisites | None mandatory; 3+ years of networking experience or IST certification recommended |
| Delivery | Kryterion/Webassessor; remote online proctoring or a Kryterion test center |
| Credential validity | 3 years |
| Renewal | At least 30 CEUs plus conduct agreement |
Notice the multiple-select format. Some questions ask you to choose more than one correct answer, so partial knowledge is a liability. You need to know why each wrong option is wrong, not just which one looks right. The RNS passing score breakdown explains how the 102-of-150 threshold plays out in practice, and the RNS requirements guide covers eligibility in more detail.
Domain Weights: Where the Points Live
The blueprint dated April 15, 2024 (effective September 1, 2024) lists five domains. The percentages are the issuer's official objective weights. The published item allocations are 53, 22, 22, 31 and 22 questions respectively, in the same order as the domains below.
| Domain | Weight | Published Items |
|---|---|---|
| 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 |
Design and Wireless together account for 55% of the exam. A candidate who is strong in those two domains has a large head start, but a weak showing across the three 15% domains can still sink the attempt, because the pass line is 68% overall rather than per domain. For a longer treatment of each area, see the complete guide to the five RNS content areas.
Domain 1 Cheat Sheet: Design & Documentation (35%)
This is the biggest domain by a wide margin, and it rewards candidates who think like a planner rather than only a configurator. The blueprint's preparation topics point to residential network planning and documentation, PoE power budgets and bandwidth, and AV-over-IP and multicast.
Must-Know Design Topics
Expect scenario questions where you size a network for a home with many endpoints and AV devices.
- PoE power budgets: know how to total powered-device draw against switch capacity, and why the budget matters when cameras, access points and keypads share a switch.
- Bandwidth planning: estimate aggregate and per-link demand, especially where AV streams cross uplinks.
- AV-over-IP and multicast: understand how multicast traffic behaves on a residential switch fabric and what happens when it is not controlled.
- Documentation: network diagrams, addressing plans, device inventories and as-built records are fair game.
- IPv6 and discovery protocols: the blueprint names both as explicit objectives.
- Timing-aware AV networks: know why synchronized media needs predictable timing across the network.
Because this domain carries 53 published items, spend your first and longest study blocks here. If you only master one area, make it this one.
Domain 2 Cheat Sheet: Network Configuration (15%)
Configuration questions turn a design into working settings. The blueprint's named preparation areas that land here include VLANs and QoS.
Configuration Priorities
Think about how a residential system is segmented and how traffic is prioritized.
- VLANs: separating AV, control, IoT, guest and trusted traffic, and what the segmentation is meant to achieve.
- QoS: why time-sensitive traffic such as audio and video needs priority treatment and how that interacts with multicast.
- Addressing: sensible subnet and address planning in both IPv4 and IPv6 contexts.
- Multicast configuration: the settings that keep AV-over-IP streams from flooding a home network.
Note the overlap with Domain 1. A design question may quietly test a configuration concept, so do not study the domains in total isolation.
Domain 3 Cheat Sheet: Troubleshooting & Verification (15%)
This domain tests method as much as knowledge. Questions typically describe a symptom and ask for the most logical next step or the most likely cause.
Troubleshooting Habits the Exam Rewards
Work from symptom to cause using a disciplined process.
- Isolate whether a fault is physical, addressing-related, segmentation-related or wireless-related before changing anything.
- Verify power first on PoE-fed devices; a power budget overrun can look like a device failure.
- Recognize the signature of uncontrolled multicast or a QoS misconfiguration in an AV system.
- Know what verification looks like after a fix: confirming performance and documenting the result, not just seeing a link light.
Domain 4 Cheat Sheet: Wireless Networking (20%)
Wireless is the second-largest domain at 20%, with 31 published items. The blueprint calls out wireless site assessment as a preparation topic, which tells you the exam cares about planning coverage before installing hardware.
Wireless Focus Areas
Residential environments have their own challenges: construction materials, large footprints, and dense device counts.
- Site assessment: evaluating coverage needs, interference sources and building characteristics before placing access points.
- Access point placement and density: how layout and client load affect design decisions.
- Wired backbone for wireless: access points rely on PoE and adequate uplinks, which ties back to Domain 1.
- Segmentation of wireless clients: mapping SSIDs to appropriate VLANs ties directly to Domains 2 and 5.
Wireless questions frequently combine concepts from other domains, so a candidate who studies it as a standalone topic will miss the connections the exam likes to test.
Domain 5 Cheat Sheet: Network Security (15%)
The security domain explicitly references NIST 2.0 among its objectives. Treat that as a signal to learn the framework's structure and vocabulary rather than memorizing generic security slogans.
Security Essentials
Think in terms of protecting a client's home network without breaking the AV and control systems on it.
- NIST 2.0: an explicit objective; understand its purpose and how its concepts map to residential practice.
- Segmentation as a security control: isolating IoT and guest devices from trusted resources.
- Access control and credential hygiene: remote access, default passwords and administrative accounts on installed gear.
- Handover practices: documenting and transferring credentials responsibly to the homeowner.
Key Takeaway
Stay within the blueprint. CEDIA's objectives are residential and integration-focused, and generic enterprise-networking material should not be assumed to represent exact RNS coverage. Anchor your prep to the named topics rather than a broad networking textbook.
Fees, Scheduling and Renewal Quick Reference
Cost and booking
The US examination fee is $200 for CEDIA members and $300 for non-members. CEDIA provides a voucher and instructions, and you schedule through Kryterion/Webassessor, choosing either remote online proctoring or a Kryterion test center. You must also accept the Certification Code of Conduct. The RNS certification cost breakdown goes deeper on pricing, and the RNS exam dates and scheduling guide covers booking logistics.
Retest fee: check before you pay
CEDIA's current certification pages list a US$80 retest fee, while the linked April 2024 blueprint still prints $125. The live web price is the current advertised amount, but sources are not unanimous, so confirm the applicable charge at the time you book.
Renewal
The credential is valid for three years and renews with at least 30 CEUs plus the required conduct agreement. CEDIA's current CEU guidance states that RNS has no renewal application or renewal fee, while cautioning that policies can change. Keep activity records and follow your assigned certification period. Do not apply another CEDIA credential's renewal fee or requirements to RNS.
Legacy ESC-N holders: that exam stopped being offered on September 1, 2024. Active legacy holders are recognized through their current period and may transition to RNS at renewal with 30 CEUs and agreement to the new conduct code.
Numbers You Should Treat With Care
Other things that are not established: CEDIA does not publish a separate scored/unscored split for the production exam, and no RNS-specific salary figure or proven certification earnings premium has been verified, so be skeptical of any site quoting one. Likewise, a complete RNS candidate handbook was not publicly available, so details such as calculator policy, breaks and accommodations should be confirmed with CEDIA rather than assumed from other credentials. For the career side, see the RNS worth-it analysis and the RNS salary guide for what can and cannot be said.
The September 2024 beta window, extra beta questions and $50 beta fee are historical. The updated production certification was publicly released November 1, 2024, which is separate from the blueprint's September 1, 2024 effective date.
Scheduling Domains Across Your Prep Weeks
You do not need an elaborate method. The one scheduling principle worth applying is to order study by weight and dependency: Design first because it is largest and feeds everything else, then Configuration, then the domains that build on both. CEDIA's own preparation resources include the Integrated Systems Technician book's networking chapter, Advanced Residential Electronic Systems chapters 10-12, relevant networking and security courses and white papers, and two official practice-test modes (one with answers, one without). Remember that CEDIA states sample questions are not actual test questions and do not necessarily predict performance.
Design & Documentation
- PoE budgets, bandwidth, AV-over-IP and multicast
- IPv6, discovery protocols, timing-aware AV
- Practice documenting a sample home network
Configuration
- VLAN segmentation and QoS for AV traffic
- Multicast settings and addressing plans
Wireless
- Site assessment and access point planning
- Tie SSIDs to VLANs and PoE capacity
Security and Troubleshooting
- NIST 2.0 vocabulary and segmentation as control
- Symptom-to-cause drills and verification steps
Full-length practice
- Take the official practice mode without answers under three-hour timing
- Review misses by domain and revisit the weakest
Adjust the pace to your experience. CEDIA recommends at least three years of related networking experience or IST certification, though neither is required. Candidates with strong field experience may compress the early weeks; those newer to residential AV networking should extend them. For more on difficulty, read how hard the RNS exam is, and when you are ready to test yourself, try the timed questions on the RNS practice test site.
RNS Cheat Sheet FAQ
The exam has 150 multiple-choice and multiple-select questions with a three-hour limit. No study materials are allowed during the test.
The passing score is 68%, which equals 102 of 150 questions. See the passing score guide for details.
Network Design & Documentation, at 35% of the exam, is the largest. Wireless Networking at 20% is next. The other three domains are 15% each.
No mandatory prerequisites exist. CEDIA recommends at least three years of related networking experience or IST certification, and candidates must accept the Certification Code of Conduct. More detail is in the requirements guide.
The US fee is $200 for CEDIA members and $300 regular. CEDIA supplies a voucher, and you schedule through Kryterion/Webassessor using remote proctoring or a test center. Confirm the retest fee when booking, since CEDIA's sources show different amounts.
The credential lasts three years and renews with at least 30 CEUs plus agreement to the conduct code. CEDIA's current guidance lists no renewal application or fee for RNS, though policies can change, so verify before your period ends.