JNCIS-MistAI-Wireless flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Non-overlapping 2.4 GHz channels

Channels 1, 6, and 11 are the non-overlapping 2.4 GHz channels in North America; using them reduces co-channel interference between adjacent APs.

SNR formula

SNR equals RSSI minus noise floor, expressed in dB. A 25 dB SNR or better generally supports high MCS rates and stable voice quality.

802.11ax OFDMA

OFDMA divides a channel into resource units so multiple clients transmit simultaneously, improving efficiency in dense environments and reducing latency.

WPA3-SAE

WPA3 uses Simultaneous Authentication of Equals for a secure handshake resistant to offline dictionary attacks. It is mandatory on 6 GHz and supports forward secrecy.

802.11r fast roaming

802.11r enables fast BSS transition so clients pre-authenticate with neighboring APs, reducing roam time. It requires client and AP support and consistent configuration.

MCS index

The MCS index defines modulation and coding scheme for a Wi-Fi frame. Higher MCS values use denser modulation and require stronger SNR and cleaner channels.

Mist cloud architecture

Mist APs connect outbound over HTTPS to the Mist cloud, which hosts management, telemetry, and AI. No on-premises controller is required for normal operation.

AP claim process

Mist APs are added to an organization by claim code or MAC address, then assigned to a site before configuration is applied from templates.

WLAN template

A WLAN template defines SSIDs, security, VLAN assignment, and band settings. Templates are reused across sites to keep configuration consistent.

RF template

An RF template defines channel width, transmit power, minimum data rate, and band steering. It is applied to sites or site groups for consistent RF behavior.

Site variables

Site variables are key-value pairs used in templates to customize settings per site, such as VLAN IDs or PSKs, without duplicating template configuration.

Mist Edge

Mist Edge provides local survivability and cloud connectivity for branch sites, allowing continued operation if the WAN link to the cloud is interrupted.

SSID security modes

Mist SSIDs support open, WPA2-PSK, WPA3-SAE, WPA2/WPA3 transition, 802.1X with RADIUS, and captive portal authentication methods.

Dynamic VLAN assignment

RADIUS returns VLAN attributes during 802.1X authentication, allowing the AP to place a client into a specific VLAN based on identity or policy.

Band steering

Band steering encourages dual-band clients to associate on 5 GHz, reducing congestion on 2.4 GHz. It can be balanced or prefer-5GHz and should match client capabilities.

Minimum data rate

The minimum data rate setting drops low-rate management and data frames, shrinking the cell edge and improving airtime efficiency in dense deployments.

Captive portal SSID

A captive portal SSID redirects clients to a login page before granting access. Mist can host the portal or redirect to an external portal server.

RADIUS CoA

Change of Authorization lets the RADIUS server dynamically modify an active client session, such as changing VLAN or applying a new policy, without reauthentication.

Service Level Expectations

Mist SLEs measure network performance against thresholds for coverage, capacity, roaming, AP uptime, successful connect, time to connect, and throughput.

SLE classifier

Each SLE has a classifier that labels results as good, fair, or poor based on configured thresholds, helping identify which users or APs are affected.

Marvis Actions

Marvis Actions are prioritized issues detected by Mist AI, showing severity, scope, and suggested remediation for problems such as DHCP failure or bad cable.

Remote packet capture

Mist supports remote packet capture from APs through the cloud UI, allowing troubleshooting of client connectivity without visiting the site.

Mist webhooks

Mist can send alarms and events to external systems such as Slack, Teams, PagerDuty, or custom endpoints through webhook integrations and the REST API.

AP uptime SLE

The AP uptime SLE tracks the percentage of time APs remain connected and operational, flagging sites or devices with frequent disconnects or reboots.

Marvis natural-language query

Marvis accepts natural-language questions about network health, clients, or APs, returning correlated evidence and suggested next steps in the Mist UI.

Marvis root-cause hints

Marvis correlates SLE data, client events, and telemetry to suggest root causes such as DHCP failure, DNS issues, coverage holes, or VLAN mismatch.

Marvis query scope

Marvis queries can be scoped to an organization, site, AP, client, or SSID, and results include related events and recommended actions.

Marvis API access

Marvis capabilities are available through the Mist UI and REST API, enabling programmatic queries and integration with external operations tooling.

Marvis misconfiguration detection

Marvis can detect configuration problems such as VLAN mismatches or missing DHCP and recommend remediation, helping reduce mean time to repair.

Mist LBS

Mist Location-based Services use APs as sensors and client RSSI to estimate device location, supporting asset visibility, zone analytics, and proximity notifications.

vBLE

Virtual BLE uses AP antennas to emulate Bluetooth Low Energy beacons, enabling asset tags and wayfinding without deploying physical beacon hardware.

LBS accuracy factors

Location accuracy depends on AP density, calibration, and environment. Zone-level accuracy is generally more reliable than precise x/y coordinates in Mist LBS.