SCTE BWS Exam Study Guide (2026)
Everything the SCTE Broadband Wireless Specialist (BWS) tests, topic by topic: what each section covers, the facts that come up most, and how to study it. Pair it with the free 15-question practice test.
The exam at a glance
| Questions | 50 multiple-choice questions (SCTE certification brochure; the BWS exam page itself does not state the count) |
|---|---|
| Time | 2 hours; the exam cannot be paused and breaks are not allowed |
| Passing score | 76% (38 of 50 correct), per the SCTE certification brochure; confirm with SCTE when you buy the exam |
| Format | Open book: SCTE training materials, books, printed documents, notes, tables, calculators and internet resources are allowed (digital content in a separate tab of the same browser); AI tools are not allowed |
| Certifying body | SCTE (Society of Cable Telecommunications Engineers), a subsidiary of CableLabs |
| Test provider | Online through the SCTE account portal, with Proctorio automated remote proctoring on Chrome or Edge (webcam, microphone and photo ID required) |
Mind map: the whole exam on one screen
Read the complete SCTE BWS study notes for “Premises Wireless Networks and Network Layers”
Our first full set of comprehensive notes, about 11 minutes of reading: What is inside a cable gateway · Network layers in practice · IP addressing behind the gateway · Extending the network, a worked exam example, the traps examiners use and a one-minute recap. Create a free account to read it and see how premium notes work before you decide.
1. Premises Wireless Networks and Network Layers
Covers SCTE's 'customer premises wireless networks' and 'network layers' areas: how the cable gateway, router functions, access points and clients fit together, and where Wi-Fi sits in the OSI model. SCTE does not publish topic weights for BWS.
Key facts
- A typical cable gateway combines a DOCSIS modem, a router (NAT, DHCP server, firewall), an Ethernet switch and one or more Wi-Fi access points.
- 802.11 Wi-Fi defines layer 1 (physical radio) and layer 2 (MAC); IP addressing is layer 3 and TCP/UDP is layer 4.
- The SSID is the network name; the BSSID is the MAC address of one access point radio. One SSID can be served by many BSSIDs in a mesh or multi-AP network.
- Private IPv4 ranges (RFC 1918): 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16. The gateway uses NAT to share one public address.
- A 169.254.x.x (APIPA) address means the client got no DHCP reply; layer 2 may be working while layer 3 has failed.
- Two routers in series cause double NAT and separate subnets; put one in bridge or access point mode.
- Wired backhaul options for extra access points include Ethernet and MoCA over the home's coax.
Flashcards
Exam tip: When a question mentions an IP address, read it first: 169.254 points to DHCP, a 192.168 address behind another 192.168 router points to double NAT.
2. Wi-Fi Standards and Transmission
SCTE's 'Wi-Fi standards and transmission' area: the 802.11 amendments, their bands and features, and how Wi-Fi shares the medium. Weights not published.
Key facts
- 802.11b (2.4 GHz, 11 Mbps), 802.11a (5 GHz, 54 Mbps), 802.11g (2.4 GHz, 54 Mbps) are legacy standards.
- 802.11n (Wi-Fi 4): 2.4 and 5 GHz, MIMO, 40 MHz channels, up to 600 Mbps with four streams.
- 802.11ac (Wi-Fi 5): 5 GHz only, 80 and 160 MHz channels, 256-QAM, downlink MU-MIMO.
- 802.11ax (Wi-Fi 6): 2.4 and 5 GHz, OFDMA, 1024-QAM, uplink and downlink MU-MIMO, target wake time and BSS colouring. Wi-Fi 6E adds the 6 GHz band.
- 802.11be (Wi-Fi 7) adds 320 MHz channels in 6 GHz, 4096-QAM and multi-link operation.
- Wi-Fi is half duplex and uses CSMA/CA: a station listens before it transmits and every unicast frame is acknowledged.
- Real throughput is usually about half to two-thirds of the PHY link rate because of contention and protocol overhead.
- Clients and APs fall back to the highest standard both support; a legacy client can slow other clients on the same channel.
Flashcards
Exam tip: Make a three-column table: standard, Wi-Fi name, bands. Most standards questions are answered from that table alone.
3. Wi-Fi RF Fundamentals
SCTE's 'Wi-Fi radio frequency fundamentals' area: power units, path loss, signal and noise, channel plans and RF behaviour in buildings. Weights not published.
Key facts
- 0 dBm = 1 mW; 10 dBm = 10 mW; 20 dBm = 100 mW; 30 dBm = 1 W. Each 3 dB doubles or halves power; each 10 dB is a factor of ten.
- Free-space path loss rises about 6 dB each time distance doubles.
- Signal-to-noise ratio (SNR) = signal minus noise floor in dB; -65 dBm signal over a -92 dBm floor is 27 dB.
- A common design target for voice and video is about -67 dBm signal with 25 dB or more SNR.
- In the US 2.4 GHz band, channels 1 to 11 are 5 MHz apart; only 1, 6 and 11 do not overlap at 20 MHz.
- 5 GHz has many more channels, but some (UNII-2, roughly channels 52 to 144) need DFS and must move if radar is detected.
- Higher frequencies lose more through walls and floors; 5 and 6 GHz cover less area than 2.4 GHz at the same power.
- RF behaviours: absorption (water, people), reflection (metal, mirrors), refraction, diffraction and multipath.
Flashcards
Exam tip: Convert everything to dB and add or subtract. If a question gives mW, change it to dBm first using the 3 dB and 10 dB rules.
Test yourself on these topics
Take the free 15-question SCTE BWS test, then save your results to unlock your Readiness Score and the mistakes bank.
4. Antenna Theory for Wi-Fi
SCTE's 'antenna theory for Wi-Fi networks' area: gain, patterns, beamwidth, EIRP, polarization and MIMO. Weights not published.
Key facts
- Antenna gain is focus, not added power: a higher-gain antenna concentrates energy in some directions and reduces it in others.
- dBi is gain over an isotropic radiator; dBd is gain over a dipole; dBi = dBd + 2.15.
Flashcards
Exam tip: If an answer says an antenna 'adds power', it is wrong. Gain moves energy around; only the radio produces it.
5. Residential and MDU Wi-Fi Planning and Deployment
SCTE's 'residential Wi-Fi networks' and 'wireless LAN implementation' areas: site surveys, placement, coverage versus capacity, mesh and multi-AP designs, and single-family versus MDU deployment. Weights not published.
Key facts
- Place the gateway or AP centrally and elevated, away from metal panels, appliances, aquariums and mirrors.
- A site survey (predictive or walk-through) maps signal, noise and interference before deciding AP count and placement.
Flashcards
Exam tip: In placement questions, choose the answer that keeps the AP central, high and away from metal; then check whether backhaul is the real limit.
6. WLAN Security and Common Threats
SCTE's 'WLAN security and common threats' area: authentication and encryption options, safe gateway settings and attacks against Wi-Fi users. Weights not published.
Key facts
- WEP is broken and WPA with TKIP is deprecated; neither should be used.
- WPA2-Personal uses a pre-shared key with AES-CCMP encryption; WPA3-Personal replaces the PSK handshake with SAE, which resists offline password guessing.
Flashcards
Exam tip: Rank security options from weakest to strongest: open, WEP, WPA-TKIP, WPA2-AES, WPA3. The exam usually wants the strongest one the devices support.
7. Wireless Installation and WLAN Troubleshooting
SCTE's 'wireless broadband installation' and 'troubleshooting WLANs' areas: a structured approach to speed, coverage, connection and interference complaints. Weights not published.
Key facts
- Start at the bottom: confirm modem registration and a wired speed test at the gateway before changing Wi-Fi settings.
- Then check the client: Wi-Fi standard, number of spatial streams, band, driver and power-saving settings.
Flashcards
Exam tip: Work bottom-up and one change at a time. Exam answers that jump straight to replacing equipment are rarely right.
How to pass
- Open book only helps if your notes are fast to search. Keep one page with dBm-to-mW values, the 3 dB and 6 dB rules, 802.11 standards by band and the US 2.4 GHz channel plan.
- Know which band each standard uses: 802.11ac is 5 GHz only, 802.11ax runs on 2.4, 5 and (as Wi-Fi 6E) 6 GHz. Questions often hide this inside a customer complaint.
- In troubleshooting questions, prove the wired service first. A good speed at the gateway's Ethernet port moves the problem to the WLAN, not the cable plant.
- Expect MDU questions: co-channel interference from neighbours is solved with lower power, narrower channels and good placement, not with more power.
Frequently asked questions
How long should I study for the SCTE BWS exam?
Most working candidates need 4 to 8 weeks at 45 to 60 minutes a day. Book your exam once your Readiness Score has stayed at 80 or higher for about a week.
Can I take the SCTE BWS exam online?
BICSI's v15 handbook describes the RCDD exam at Pearson VUE test centers, not remote proctoring. Format: open book: scte training materials, books, printed documents, notes, tables, calculators and internet resources are allowed (digital content in a separate tab of the same browser); ai tools are not allowed. Check pearsonvue.com/bicsi for the options in your country.
What score do I need to pass the SCTE BWS exam?
76% (38 of 50 correct), per the SCTE certification brochure; confirm with SCTE when you buy the exam. The exam has 50 multiple-choice questions (scte certification brochure; the bws exam page itself does not state the count) and a time limit of 2 hours; the exam cannot be paused and breaks are not allowed.
What are the most tested topics?
The outline covers premises wireless networks and network layers, wi-fi standards and transmission, wi-fi rf fundamentals, antenna theory for wi-fi, residential and mdu wi-fi planning and deployment, wlan security and common threats, wireless installation and wlan troubleshooting. Use the free practice test to see which ones you need most.
The premium SCTE BWS study path
Premium SCTE BWS prep is studied one topic at a time. Each step starts with that topic's key notes and flashcard deck, then its own question sets of 25, so you master one topic before you move to the next. When every topic is strong, the 6 full mock exams show you're ready.
Your step-by-step study path
- 1Premises Wireless Networks and Network Layers9 key notes, 115 flashcards, then 450 practice questions in 18 sets of 25Notes free with an account
- 2Wi-Fi Standards and Transmission9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 3Wi-Fi RF Fundamentals9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 4Antenna Theory for Wi-Fi9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 5Residential and MDU Wi-Fi Planning and Deployment8 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 6WLAN Security and Common Threats8 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 7Wireless Installation and WLAN Troubleshooting8 key notes, 110 flashcards, then 425 practice questions in 17 sets of 25Premium
- Final step: 6 full mock exams50 questions each, timed like test day. Pass them, then book your exam.Premium
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- 3,000 practice questions + 6 full mock exams per exam
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- Video lessons as they release
- Content updates during your access
- 5 bonuses: numbers and formulas sheet, standards atlas, study planner and more
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Renews once a year until you cancel. We email you before each renewal. Cancel any time from your account; you keep access until the end of the year you've paid for.
Summarized from BICSI's official candidate information and the rules cited, checked October 2026. Confirm current requirements with SCTE (Society of Cable Telecommunications Engineers), a subsidiary of CableLabs.