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Międzynarodowy Dzień Szachów

Najczęściej adres MAC zostaje przypisany przez producenta karty sieciowej poprzez umieszczenie go w postaci heksadecymalnej w zapisanym na stałe w pamięci oprogramowaniu układowym. Pierwsze 24 bity to identyfikator producenta (organizationally unique identifier, OUI), następne 24 to właściwy unikalny numer danego egzemplarza karty. Koncepcja adresów MAC wywodzi się ze schematu adresowania Ethernetu Xerox Network Systems.

Adres MAC to sprzętowy adres karty sieciowej Ethernet i Token Ring. Jest on unikalny w skali światowej, a żeby to zapewnić, przydzielaniem zakresów zajmuje się Instytut Inżynierów Elektryków i Elektroników (IEEE).

Henryk Jordan – pionier wychowania fizycznego

Our browser made a total of 29 requests to load all elements on the main page. We found that 90% of them (26 requests) were addressed to the original Posservice.ru, 10% (3 requests) were made to Counter.yadro.ru. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Posservice.ru.

In fact, the total size of Posservice.ru main page is 275.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 10% of websites need less resources to load. Images take 234.4 kB which makes up the majority of the site volume.

We analyzed Posservice.ru page load time and found that the first response time was 1.5 sec and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. POSSERVICE images are well optimized though.

Another way to prevent getting this page in the future is to use Privacy Pass. You may need to download version 2.0 now from the Chrome Web Store.

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If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware.

If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.