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ProtocolDHCP
(2008-06-20,
OxanaAkhremenko
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%STARTALIASAREA% ---+++ Dynamic Host Configuration Protocol Обеспечивает параметры конфигурации для Интернет-хостов. DHCP включает компоненты двух видов: параметры конфигурации доставки данных, зависящие от протокола хоста, и механизм размещения сетевых адресов для хостов. ---++++ Пример дешифрации <verbatim> DHCP (Dynamic Host Configuration Protocol): RFC 2131, 1997 43 00000001 Message operation code/message BOOTREQUEST 44 00000001 Hardware address type......... Ethernet (10Mb) 45 00000110 Hardware address length....... 6 Hex 46 00000000 Hardware address options...... 0 Hex -- Transaction ID 47 ***B4*** Integer....................... 2702995885 Dec 51 ***b16** Elapsed seconds............... 0 Dec -- Flags 53 0....... Broadcast flag................ 0 Hex .0000000 Spare......................... 0 54 00000000 Spare......................... 0 -- Client IP address -- (Align bits) 55 ***B4*** Address....................... XX.XX.X.X -- Client IP address (your) -- (Align bits) 59 ***B4*** Address....................... 0.0.0.0 -- Next server IP address -- (Align bits) 63 ***B4*** Address....................... 0.0.0.0 -- Relay agent IP address -- (Align bits) 67 ***B4*** Address....................... 0.0.0.0 -- Client hardware address 71 ***B16** Address....................... 0:XX:XX:XXX:XXX:XXX:0:0:0:0: 0:0:0:0:0:0 -- Server host name 87 ***B64** Octetstring................... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -- Boot file name 151 **B128** Octetstring................... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -- Options -- Cookie -- (Align bits) 279 ***B4*** Address....................... XX.XX.XX.XX -- DHCP options 283 00110101 Tag........................... 53: DHCP message type 284 00000001 Length........................ 1 Dec 285 00000011 DHCP message type............. DHCP request 286 00111101 Tag........................... 61: Client-identifier 287 00000111 Length........................ 7 Dec -- Client identifier 288 00000001 Hardware address type......... Ethernet (10Mb) 289 ***B6*** IA5-characters................ .Z.|.. 295 00001100 Tag........................... 12: Host name option 296 00000101 Length........................ 5 Dec -- Host name option 297 ***B5*** IA5-characters................ XXXXX 302 01010001 Tag........................... 81: Reserved for site-specific options -- Data 303 ***B40** Data.......................... 09 00 00 00 6F 78 61 6E 61 2E 3C 08 4D 53 46 54 20 35 2E 30 37 0B 01 0F 03 06 2C 2E 2F 1F 21 F9 2B 2B 03 DC 01 00 FF 00 </verbatim> ---++++ Ссылки * [[http://www.ietf.org/rfc/rfc2131.txt?number=2131][Dynamic Host Configuration Protocol]]
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Topic revision: r1 - 2008-06-20 - 14:00:26 -
OxanaAkhremenko
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