802.11 Physical Layers (PHYs)

As different wireless exams ask for theoretical knowledge about the PHYs, I googled for an overview of all PHYs in a single table. I was not able to find one and therefore created such a table based on the CWNA-108 Study Guide.

 

Physical Layer Name (PHY)

802.11

Band

Channel Width (MHz)

Datarates (Mbps)

Spatial Streams

DSSS (Direct Sequence Spread Spectrum)

802.11

2.4

22

1, 2

1 SS

HR-DSSS (High Rate-DSSS)

802.11b

2.4

22

1, 2, 5.5, 11

1 SS

OFDM (Orthogonal Frequency Division Multiplexing)

802.11a

5

20

6, 9, 12, 18, 24, 36, 48, 54

1 SS

ERP (Extended Rate PHY)

802.11g

2.4

20

6, 9, 12, 18, 24, 36, 48, 54

1 SS

HT (High Throughput)

802.11n

2.4 & 5

20, 40

Up to 600

Up to 4 SS

DMG (Directional Multi-Gigabit)

802.11ad

60GHz

Max 2160 MHz

UP to 6756

N/A

VHT (Very High Thorughtput)

802.11ac

5

20,40,80,160

Up to 6933

Up to 8 SS

HE (High Efficiency)

802.11ax

2.4 & 5 &6

20,40,80, optional 160

Up to 9602

Up to 8 SS

TVHT (TV Whitespace HT)

802.11af

50-790MHz

6-8MHz

Up to 568.9

Up to 4 SS

S1G (Sub-1GHz)

802.11ah

Sub 1GHz

1,2,4,8,16 MHz

Up to 346

Up to 4 SS

 

Cedric Metzger
Network Engineer at ITRIS One AG

Schreibe einen Kommentar

Deine E-Mail-Adresse wird nicht veröffentlicht. Erforderliche Felder sind mit * markiert.

Diese Website verwendet Akismet, um Spam zu reduzieren. Erfahre mehr darüber, wie deine Kommentardaten verarbeitet werden.