Apple AirPort Networks Guía para resolver problemas descargar pdf (Pagina 19)

Wi-Fi Gear from Apple

A long history with Wi-Fi has led to three devices in Apple’s current

lineup of base stations, each with a distinct set of features. Let’s look

first at how Apple has chosen to work with 802.11n and 802.11ac, and

then at Apple’s current

AirPort Base Station Models and the options

for Adapters in Macs and iOS Devices.

At the end of this chapter, you should better understand the gear that

you have, or be

in a better position to shop for new equipment.

802.11n, 802.11ac, and Apple’s Choices

Apple has made distinct choices when implementing Wi-Fi, but all

three of Apple’s current base station models can handle both the

2.4 GHz band and the 5 GHz band at the same time.

Note: Despite the AirPort Express being called an 802.11n base

station and the 2013 models of the AirPort Extreme and Time

Capsule’s being labeled 802.11ac, these are really “multi-protocol”

devices. That is, the Express can handle a, b, g, and n in any

combination; the 2013 Extreme and Time Capsule handle a, b, g,

and n while also adding ac in the 5 GHz band.

For the 5 GHz band, Apple enables just 8 of the 23 possible channels

in the United States for use in a base station. This is because of a

compromise among the radio equipment industry, the military,

government agencies, and the FCC. This compromise protects 15 of

the possible 23 channels so that base station signals don’t cause even

the slightest interference with weather-sensing and military radar, but

it also makes it more difficult to use those channels for home networks.

Apple has chosen not to support those 15 channels in its base stations.

The company doesn’t think that they would be consistently available

in a way that would be useful to most consumers and small offices

using AirPort gear.

Click here to buy the full 196-page “Take Control of Your Apple Wi-Fi Network” for only $20!

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Apple AirPort Networks Guía para resolver problemas Pagina 19