{"id":1549,"date":"2025-06-25T18:15:37","date_gmt":"2025-06-25T17:15:37","guid":{"rendered":"https:\/\/workboot.fr\/ciela\/?page_id=1549"},"modified":"2026-03-23T14:29:09","modified_gmt":"2026-03-23T13:29:09","slug":"les-classes","status":"publish","type":"page","link":"https:\/\/workboot.fr\/ciela\/les-classes\/","title":{"rendered":"Les classes"},"content":{"rendered":"\n

Cours sur les classes en IPV4<\/a><\/p>\n\n\n\n

\ud83e\udde9 Exercice 1 : Identifier la classe<\/strong><\/h2>\n\n\n\n

Donne la classe (A, B, C, D ou E) de chaque adresse suivante :<\/strong><\/p>\n\n\n\n

    \n
  1. 10.34.5.1<\/code><\/li>\n\n\n\n
  2. 172.16.0.5<\/code><\/li>\n\n\n\n
  3. 192.168.1.100<\/code><\/li>\n\n\n\n
  4. 150.25.10.2<\/code><\/li>\n\n\n\n
  5. 224.0.0.1<\/code><\/li>\n\n\n\n
  6. 240.10.5.4<\/code><\/li>\n<\/ol>\n\n\n\n
    \u2705 Correction Exercice 1 : Identifier la classe<\/summary>\n
    Adresse IP Classe Explication\n10.34.5.1        A Commence par 10 (entre 1 et 126)\n172.16.0.5       B Entre 128 et 191\n192.168.1.100    C Entre 192 et 223\n150.25.10.2      B Commence par 150\n224.0.0.1        D Entre 224 et 239 (multicast)\n240.10.5.4       E \u2265 240 (r\u00e9serv\u00e9e)<\/code><\/pre>\n<\/details>\n\n\n\n
    \n\n\n\n
    \ud83c\udfe0 Exercice 2 : Adresse priv\u00e9e ou publique ?<\/strong><\/h2>\n\n\n\n
    Pour chaque adresse IP, dis si elle est \u00ab\u00a0priv\u00e9e\u00a0\u00bb ou \u00ab\u00a0publique\u00a0\u00bb :<\/strong><\/p>\n\n\n\n
      \n
    1. 10.0.1.5<\/code><\/li>\n\n\n\n
    2. 172.32.0.1<\/code><\/li>\n\n\n\n
    3. 192.168.0.200<\/code><\/li>\n\n\n\n
    4. 8.8.8.8<\/code><\/li>\n\n\n\n
    5. 172.20.5.5<\/code><\/li>\n\n\n\n
    6. 192.0.2.1<\/code><\/li>\n<\/ol>\n\n\n\n
      \u2705 Correction Exercice 2 : Adresse priv\u00e9e ou publique<\/summary>\n
      Adresse IP Type Justification\n10.0.1.5       Priv\u00e9e Classe A priv\u00e9e (10.0.0.0\/8)\n172.32.0.1     Publique Hors plage priv\u00e9e (priv\u00e9e = 172.16.0.0\/12)\n192.168.0.200  Priv\u00e9e Classe C priv\u00e9e\n8.8.8.8        Publique C\u2019est Google DNS, classe A publique\n172.20.5.5     Priv\u00e9e Dans la plage 172.16.0.0 \u2013 172.31.255.255\n192.0.2.1      Publique (r\u00e9serv\u00e9e pour tests\/documentation)<\/code><\/pre>\n<\/details>\n\n\n\n
      \n\n\n\n
      \ud83d\udcd0 Exercice 3 : Masque et nombre d\u2019h\u00f4tes<\/strong><\/h2>\n\n\n\n
      Donne pour chaque classe :<\/strong><\/p>\n\n\n\n
        \n
      • Le masque par d\u00e9faut<\/strong><\/li>\n\n\n\n
      • Le nombre d\u2019h\u00f4tes possibles<\/strong> (valables, sans le r\u00e9seau ni le broadcast)<\/li>\n<\/ul>\n\n\n\n
        Classe<\/th>Masque par d\u00e9faut<\/th>H\u00f4tes valides ?<\/th><\/tr><\/thead>
        A<\/td>?<\/td>?<\/td><\/tr>
        B<\/td>?<\/td>?<\/td><\/tr>
        C<\/td>?<\/td>?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
        \u2705 Correction Exercice 3 : Masques et h\u00f4tes<\/summary>\n
        Classe Masque par d\u00e9faut H\u00f4tes valides\nA 255.0.0.0 (\/8)         2\u00b2\u2074 \u2212 2 = 16 777 214 h\u00f4tes\nB 255.255.0.0 (\/16)      2\u00b9\u2076 \u2212 2 = 65 534 h\u00f4tes\nC 255.255.255.0 (\/24)    2\u2078 \u2212 2  = 254 h\u00f4tes<\/code><\/pre>\n<\/details>\n\n\n\n
        \n\n\n\n
        \ud83e\udde0 Exercice 4 : Mini analyse r\u00e9seau<\/strong><\/h2>\n\n\n\n
        Un administrateur r\u00e9seau te dit :<\/p>\n\n\n\n
        \n
        \u00ab\u00a0J\u2019ai un r\u00e9seau local configur\u00e9 en 192.168.10.0\/24<\/code>.\u00a0\u00bb<\/p>\n<\/blockquote>\n\n\n\n
        Questions :<\/strong><\/p>\n\n\n\n
          \n
        1. \u00c0 quelle classe appartient cette adresse ?<\/li>\n\n\n\n
        2. Est-ce une adresse priv\u00e9e ?<\/li>\n\n\n\n
        3. Combien d\u2019h\u00f4tes maximum peuvent \u00eatre utilis\u00e9s dans ce r\u00e9seau ?<\/li>\n\n\n\n
        4. Quelle est la premi\u00e8re adresse utilisable ?<\/li>\n\n\n\n
        5. Quelle est l\u2019adresse de broadcast ?<\/li>\n<\/ol>\n\n\n\n
          \u2705 Correction Exercice 4 : Mini analyse r\u00e9seau<\/summary>\n
          Classe ?
          \u2192 Classe C (car 192.x.x.x)

          Adresse priv\u00e9e ?
          \u2192 Oui, plage priv\u00e9e 192.168.0.0 \u2013 192.168.255.255

          Nombre d\u2019h\u00f4tes ?
          \u2192 2\u2078 \u2212 2 = 254 h\u00f4tes (masque \/24 = 255.255.255.0)

          Premi\u00e8re adresse utilisable ?
          \u2192 192.168.10.1

          Adresse de broadcast ?
          \u2192 192.168.10.255

          <\/code><\/pre>\n<\/details>\n\n\n\n
          \n","protected":false},"excerpt":{"rendered":"
          Cours sur les classes en IPV4 \ud83e\udde9 Exercice 1 : Identifier la classe Donne la classe (A, B, C, D ou E) de chaque adresse suivante : \ud83c\udfe0 Exercice 2 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_crdt_document":"","_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-1549","page","type-page","status-publish","hentry"],"yoast_head":"\nLes classes - workboot<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/workboot.fr\/ciela\/les-classes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les classes - workboot\" \/>\n<meta property=\"og:description\" content=\"Cours sur les classes en IPV4 \ud83e\udde9 Exercice 1 : Identifier la classe Donne la classe (A, B, C, D ou E) de chaque adresse suivante : \ud83c\udfe0 Exercice 2 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/workboot.fr\/ciela\/les-classes\/\" \/>\n<meta property=\"og:site_name\" content=\"workboot\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-23T13:29:09+00:00\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/workboot.fr\\\/ciela\\\/les-classes\\\/\",\"url\":\"https:\\\/\\\/workboot.fr\\\/ciela\\\/les-classes\\\/\",\"name\":\"Les classes - 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