38595053
Beschreibung
Karteikarten von Lyndsay Badding, aktualisiert more than 1 year ago
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Erstellt von Lyndsay Badding
vor mehr als ein Jahr
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| Frage | Antworten |
| 802.11a | 5GHz 54Mbps WiFi 2 |
| 802.11b | 2.4GHZ 11Mbps up to 150ft |
| 802.11g | 2.4GHZ 54Mbps upgrade to 802.11b, backwards compatible same speeds as 802.11a WiFi 3 |
| 802.11n | 2.4 & 5GHz 288Mbps (single channel) 600Mbps (bonded channels) wifi 4 upgrade for 802.11g, b, and a uses MIMO |
| 802.11ac | 5GHz 1.7Gbps wifi 5 upgrade for 802.11n uses MU-MIMO |
| 802.11ax | 2.4, 5 & 6GHz 2Gbps up to 10Gbps wifi 6 uses MU-MIMO |
| 2.4 GHz channels | 11 channels 3 non-overlapping 1, 6, 11 |
| 5GHz | 45 channels 23 non-overlapping |
| ad-hoc mode | chain devices together instead of going through a centralized device like an AP useful to share resources when no WAP is available |
| infrastructure mode | requires utilizing one or more APs to manage everything on the WLAN |
| SSID | Service Set Identifier name of the wireless access point |
| MIMO | Multiple-In Multiple-Out uses two or more antennas, connects to multiple devices used in 802.11n, 3G, and 4G |
| MU-MIMO | Multi-User, Multiple-In Multiple-Out makes the wait faster by dividing "the line" by multiple connection links used in 802.11n, 3G, and 4G |
| WEP | Wired Equivalent Privacy uses RC4 security deprecated occasionally on legacy systems |
| WPA | Wi-Fi Protected Access uses TKIP (128-bit keys) security replaced WEP 802.11i |
| WPA2 | Wi-Fi Protected Access Version 2 uses AES-CCMP (256-bit keys) security 65% of wifi users 4-way handshake 802.11i |
| WPA3 | Wi-Fi Protected Access Version 3 uses AES-GCMP (256-bit keys) security "dragonfly handshake" - 4-way, PFS uses SAE wifi 6, 802.11ax, 6GHz |
| TKIP | Temporal Key Integrity Protocol the base on which WPA was built uses RC4 cipher |
| AES | Advanced Encryption Standard block cipher - 128, 192, 256-bit keys invented by the military up to 256-bit key encryption IoT devices use AES |
| RADIUS | Remote Authentication Dial-in User Service AAA server enterprise wifi uses UDP encrypts only the password in the access-request packet |
| TACACS+ | Terminal Access Controller Access-Control System+ AAA server Cisco proprietary uses TCP encrypts all of the data |
| Z-Wave | IoT devices 908.42 MHz wireless mesh network up to 232 devices 4 hop limit AES-128 mandatory for connecting devices |
| Zigbee | open-source 2.4 GHz wireless mesh network up to 65,000 nodes likely will have a master coordinator node |
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