Organization of a home Wi-Fi network

Question

Computer networks

Tell me who understands the organization of Wi-Fi networks.

At the moment there is an 802.11g network up on hostapd. The speed is categorically not satisfied (the exchange between two machines is at a speed of 1 megabyte per second)

On one machine there is a D-Link DWA-140 802.11n 300Mbit adapter with Ralink drivers, in which the Wi-Fi Direct item was found.

I formulate questions:
- if a similar adapter is inserted into the second machine, will they be able to exchange with each other and at the same time have access to the access point (because the Internet is being distributed there)
- if you raise 802.11n on hostapd, will it not switch to g-mode, as smartphones and laptops with g-adapters live on the network
- - it seems that you can raise several SSIDs on hostapd, but I didn’t figure out if it’s possible to raise the g- and n-network at the same time

Answer 1

1. Only one access point can be connected from one adapter at a time. Those. machines either communicate directly (one becomes an AP) or communicate through a router. Not at the same time.
2. If you force 802.11n on the AP, then it will stop switching to compatibility mode with 802.11g devices, i.e. an increase in speed is possible (this does not cancel the overall frequency range, so it’s better not to wait for a rocket takeoff). Use this software to check the range .
3. I didn’t quite understand how your network is arranged, but I remind you that if machines exchange data through an AP / router, then the data does not go directly, i.e. in fact, the channel is divided in half into 2 devices. If we add the overhead of the wireless network itself here: 54Mbps (g) / 2 (roughly - service traffic) = 27 Mbps / 2 (devices simultaneously working with the network) = 13.5 Mbps / 8 ≈ 1.5 MB / s. Those. in the 802.11g network, there will not be much more speed (if there are hyperactive APs nearby, then for sure). Switch to 802.11n, use a NAS or a server wired to your router to throw large files and you'll be fine.
4. Take Zyxel Keenetic - it has a USB port and support for a bunch of modems. In its price range, this is better than a piece of iron (IMHO, of course).

Answer 2

DLink DIR-615 good luck!

Answer 3

Take a normal (!) ZyXEL Keenetic.

Answer 4

I hesitate to ask, but still. And religion does not allow to put a normal point? They are now dumped in handfuls in stores for change.