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Reward Pre-Intermediate Practice Book without key

автор Driscoll L. издательство Macmillan Publishers Иностранные языки
Аннотация:Я с детства с книгами дружу,
По строчкам пальчиком вожу,
И целый мир за это
Мне выдает секреты.
Автор: Driscoll L.
Издательство: Macmillan Publishers
Год:1996
Цена:
614 руб
Нет в наличии
Поиск: Reward Pre-Intermediate Practice Book without key



Беспроводные сети

В протоколе KIP предусмотрена генерация нового 128-битного ключа для каждого передаваемого пакета. Кроме того, контрольные криптографические суммы в WPA рассчитываются по новому методу под названием MIC (Message I egri y Code). В каждый кадр здесь помещается специальный восьмибайтный код целостности сообщения, проверка которого позволяет отражать атаки с применением подложных пакетов. В итоге получается, что каждый передаваемый по сети пакет данных имеет собственный уникальный ключ, а каждое устройство беспроводной сети наделяется динамически изменяемым ключом. Кроме того, протокол WPA поддерживает шифрование по стандарту AES (Adva ced E cryp io S a dard), то есть по усовершенствованному стандарту шифрования, который отличается более стойким криптоалгоритмом, чем это реализовано в протоколах WEP и KIP. При развёртывании беспроводных сетей в домашних условиях или небольших офисах обычно используется вариант протокола безопасности WPA на основе общих ключей – WPA-PSK (Pre Shared Key). В дальнейшем мы будем рассматривать только вариант WPA-PSK, не касаясь вариантов протокола WPA, ориентированных на корпоративные сети, где авторизация пользователей проводится на отдельном RADIUS-сервере.
Набор детской складной мебели Ника "Познайка. Большие гонки".
В комплект входит стол-парта и стул с мягким сиденьем. Металлический каркас. Столешница облицована пленкой с тематическими рисунками. На
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