4.1 Industry Organizations and OSI Layers

Harborline Logistics operates a marine terminal on Tacoma's tideflats and a smaller inland office campus. Three vendors on the WLAN request for proposal used IEEE standard, Wi-Fi certified, and FCC legal as if those phrases meant the same thing. They do not. This OpenExamPrep chapter is independent study material for CWNA-109 Domain 2 topics: which industry body does which job, and which OSI layers IEEE 802.11-2020 actually specifies.

IEEE — who writes 802.11

The Institute of Electrical and Electronics Engineers (IEEE) is a professional technical society. WLAN work lives in the IEEE 802 LAN/MAN Standards Committee. The IEEE 802.11 Working Group publishes the standard that defines the WLAN Medium Access Control (MAC) and Physical Layer (PHY). CWNA-109 studies the 802.11-2020 revision — a consolidated edition that rolled prior amendments into one document — plus later amendments you will meet in later chapters of this guide.

IEEE 802.11 specifies:

• PHY waveforms and data rates (DSSS, HR-DSSS, OFDM, and later HT, VHT, and HE families taught in the next chapter)
• MAC framing, addressing, scanning, 802.11 authentication as a state machine, association, and channel access
• Information elements that can carry country and power-constraint data so a radio can be configured for a regulatory domain

IEEE does not certify a retail access point as Wi-Fi 6. IEEE does not publish the United States EIRP table. IEEE does not define IPv4, DHCP, or RADIUS. Harborline's statement of work should cite IEEE 802.11 when the requirement is MAC/PHY behavior, and cite a regulator when the requirement is lawful spectrum use.

A frequent exam trap is to treat 802.11ax and Wi-Fi 6 as two different organizations. They are two names for related ideas: the first is an IEEE amendment and PHY family, the second is a Wi-Fi Alliance generation name and certification brand.

Wi-Fi Alliance — certification and marketing names

The Wi-Fi Alliance is an industry association. Its core product for administrators is interoperability certification. Vendors submit hardware and software to test plans. Products that pass may use Wi-Fi CERTIFIED marks. That program is why a Harborline handheld scanner, a visitor laptop, and a warehouse AP from three vendors can usually complete association without a proprietary same-vendor-only radio.

The Alliance also assigned the generation numbers that appear on consumer boxes and data sheets:

Those names help buyers. They are not a substitute for reading which IEEE PHY, channel widths, and security suite a bid actually includes. A radio can implement IEEE features without completing Alliance certification. Certification can also bundle security and other programs (for example WPA3) that sit on the IEEE baseline.

The Wi-Fi Alliance does not write the 802.11 standard and does not set FCC or ETSI power limits. If a Harborline vendor says the product is Alliance-approved for 30 dBm in UNII-3, ask for the FCC (or other regulator) authorization and the configured country code — not a logo.

IETF — protocols WLANs carry and consume

The Internet Engineering Task Force (IETF) publishes Requests for Comments (RFCs). At CWNA depth you need the division of labor, not an RFC catalog you can recite from memory.

WLAN stations send IP packets. IPv4 and IPv6 are IETF work (the IPv4 specification is RFC 791; IPv6 is in the RFC 8200 family). After 802.11 association, most Harborline clients still need an address: Dynamic Host Configuration Protocol (DHCP) is IETF (RFC 2131 for classic IPv4 DHCP). Enterprise SSIDs that use 802.1X typically send Extensible Authentication Protocol (EAP) methods toward a RADIUS server. EAP (RFC 3748) and RADIUS (RFC 2865 and related accounting RFCs) are IETF.

Hold a precise line on 802.1X: port-based access control is an IEEE standard (IEEE 802.1X). The EAP methods and the RADIUS conversation that a WLAN authenticator uses are IETF. Harborline's WPA2-Enterprise SSID therefore stacks IEEE 802.11, IEEE 802.1X, IETF EAP, IETF RADIUS, and IETF IP. No single body owns wireless networking.

Because 802.11 does not define IP, a client can show connected to an SSID (MAC association succeeded) while remaining useless on the LAN (DHCP timed out, or the VLAN has no gateway). Later CWNA domains spend hours on that split. Domain 2 only asks you to know it exists and which organization owns which layer.

Regulatory domains and agencies

Every country has a radio regulator. The regulator — not IEEE, not the Wi-Fi Alliance — decides which frequencies may be used, which channel numbers are permitted, maximum conducted power and equivalent isotropically radiated power (EIRP), indoor versus outdoor operation, and whether Dynamic Frequency Selection (DFS) or Transmit Power Control (TPC) is required on a band.

Two names dominate exam language and equipment data sheets:

FCC (Federal Communications Commission). In the United States, most unlicensed WLAN radios operate under 47 CFR Part 15. In 2.4 GHz, U.S. WLANs commonly use channels 1 through 11. Five-gigahertz and six-gigahertz UNII rules add indoor/outdoor splits, client-to-client restrictions on some bands, and DFS on bands that overlap radar.

ETSI (European Telecommunications Standards Institute). ETSI produces European Norms widely used for CE-marked equipment, including EN 300 328 (2.4 GHz) and EN 301 893 (5 GHz). Many European national regulators apply ETSI-based limits. A practical difference Harborline hit in a Rotterdam forwarding shed: 2.4 GHz channel 13 was usable under the European configuration and is not part of a normal FCC channels-1-through-11 plan.

Other national agencies include ISED (Canada), MIC (Japan), Ofcom (United Kingdom), and ANATEL (Brazil). You do not memorize every agency's handbook for CWNA-109. You do memorize the pattern: each country has a regulator, equipment must be configured for that regulatory domain, and cloning an AP image across a border without changing country code is a compliance and coverage failure.

IEEE 802.11 can advertise a Country information element. That advertisement does not legalize an AP that is transmitting off-channel or over-power. Harborline's dual-region mistake was an ETSI-coded image installed in Tacoma. The radios offered a 2.4 GHz channel the FCC domain would not, and the 5 GHz power table did not match U.S. EIRP. The repair was the country/regulatory setting, not a PHY upgrade.

Channel plans, DFS, and indoor/outdoor power variants return in a later Domain 2 section. This section only requires that you know who writes those rules: the regulator of the country where the transmitter is turned on.

OSI and TCP/IP layers affected by 802.11-2020

IEEE 802.11-2020 specifies:

• OSI Layer 1 (Physical): the 802.11 PHY — modulation, coding, channel width, preambles, and PPDU formats.
• OSI Layer 2 (Data Link): the 802.11 MAC — frame formats, MAC addressing, association, retries, and MAC-layer security as defined in the standard. Logical Link Control (LLC)/SNAP is also Layer 2 and typically carries an EtherType so the receiver can identify IPv4 (0x0800), IPv6, or EAPOL.

IEEE 802.11-2020 does not specify:

• OSI Layer 3: IP addressing, routing, ICMP. IP is IETF.
• OSI Layer 4: TCP and UDP.

In the four-layer TCP/IP model, 802.11 PHY plus MAC occupy the Link (Network Access) layer. The Internet layer remains IP. Application protocols such as HTTP or a DHCP client/server exchange sit above that stack; the fact that they ride over a WLAN does not make them 802.11 protocols.

Help-desk language at Harborline often says Layer 3 Wi-Fi is down. Translate it. If beacons, probe responses, and association still work, Layers 1–2 are up. If the STA has no IPv4 address or cannot ping the default gateway, the failure is at or above Layer 3 even though the user is on Wi-Fi.

The three-body trap

Questions that mention the 802.11 document point to IEEE. Questions that mention Wi-Fi 4/5/6 names or CERTIFIED logos point to the Wi-Fi Alliance. Questions that mention EIRP, channel 13, DFS mandates, or indoor-only UNII point to a regulator. Questions that mention DHCP or RADIUS point to IETF, with 802.1X remaining IEEE.

This material is independent OpenExamPrep teaching. It is not a CWNP product and does not claim official approval, review, or partnership.