-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Content-ID: <alpine.LSU.2.21.1805182335170.21312@Telcontar.valinor> On Friday, 2018-05-18 at 16:49 -0400, James Knott wrote:
On 05/18/2018 04:34 PM, Carlos E. R. wrote:
Could you remind us what is G and N? :-)
I know you're kidding, but they are different generations of WiFi.
It took me some time to remember what you were talking about by "G" or "N", and a single letter is hard to google ;-)
On 2.4 GHz, 802.11b was the first commonly used for networking. It ran at a max of 11 Mb/s. G was the next generation at 54 Mb and is the exact same protocol as 802.11a, on 5 GHz, with the addition of protection for b. N runs at up to 600 Mb, IIRC. It can also be on both 2.4 & 5 GHz bands. Of course, we can't forget about 802.11ac, which is even more bandwidth, but only on 5 GHz.
All of these, other than 802.11b, use orthogonal frequency division multiplexing. 802.11b uses Direct Sequence Spread Spectrum. This difference means that the 802.11b protection used in g & n causes a significant performance hit, as g & n must send a b frame to reserve time for the g or n frame. 802.11b also uses WEP encryption, which is easily broken. 802.11n & ac require WPA2 encryption.
These days there is little reason to use anything other than 802.11n on 2.4 GHz, as it been available for years.
BTW, O'Reilly books have some good books on WiFi, written by Matthew Gast.
I took this time to look again at the settings of my AP, and it was set to "auto" with b/g protection. I have set it to N, after verifying that my older WiFi device can connect. Then I noticed there was a firmware update and I'm applying it as I write. Then I'll take the chance to set the bandwidth to 40 (was 20/40), because my laptop says always "20" even when actively downloading things. [...] After the manual firmware update, the thing still says there is an upgrade available. I click, and this time it offers to automatically upgrade itself, and I accept. So another upgrade in progress. That worked. But then I saw that I could activate login to the router by https, and then the router no longer allows me to connect me to it. I will have to factory reset it :-/ https refuses to connect, and http gets me: Settings have been updated. Web page will now refresh. Changes have been made to the IP address or port number. You will now be disconnected from RT-N12D1. To access the settings of RT-N12D1, reconnect to the wireless network and use the updated IP address and port number. even after a reboot. Never refreshes, seems to be saved by firefox itself. And after a factory reset, I can't connect to it on 192.168.1.1 :-/ Dead. I hate these things. Trying with a direct connection to my laptop, does not respond to ping. Damn it! It only responds on rj port 1, output! Not on the input lan port. Weird. I can now connect to it on 192.168.1.1, but it insists in doing it via asus.com page wizard. It refuses to obey "skip wizard". I hate these things. At least now I can connect and reload backed up config. I hope. Ok, done. Now repeat the changes I did earlier tonight... The daft thing needs click apply on every config page tab, then wait... This time I enabled both http and https, but the later fails. Oh! The daft thing has a configured https port at 8443! It does work on that one. Damm! Ok, finished, configuration saved to file, LAN/WAN is working again. Pffff! - -- Cheers, Carlos E. R. (from openSUSE 42.3 x86_64 "Malachite" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlr/VkYACgkQtTMYHG2NR9WfHACfY7q3g6iTEu3KxkU3XQ2jMoqm fxwAnjXfNuODlrkvBMfyTYBqslpmpkwD =Phzo -----END PGP SIGNATURE-----