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DHCP (µ¿Àû È£½ºÆ® ±¸¼º ÇÁ·ÎÅäÄÝ) ±âº» »çÇ×±â¼ú ÀÚ·á: 169289 - ÀÌ ¹®¼°¡ Àû¿ëµÇ´Â Á¦Ç° º¸±â. ¿ä¾àµ¿Àû È£½ºÆ® ±¸¼º ÇÁ·ÎÅäÄÝ(DHCP) RFC RFC 2131¿¡ ÀÇÇØ ´ëüµÈ)´Â µ¿ÀûÀ¸·Î IP ÁÖ¼Ò ÁöÁ¤ ¹èÆ÷ÇÒ ¼¹ö ¹× Ŭ¶óÀÌ¾ðÆ® ±¸¼º Á¤º¸¸¦ Çã¿ëÇÏ´Â 1541¿¡ ÀÇÇØ Á¤ÀǵǴ ǥÁØ ÇÁ·ÎÅäÄÝÀÔ´Ï´Ù. ÀϹÝÀûÀ¸·Î DHCP ¼¹ö°¡ Ŭ¶óÀÌ¾ðÆ®¿¡ ÃÖ¼ÒÇÑ Á¦°øÇÕ´Ï´Ù ÀÌ ±âº» Á¤º¸:
Ãß°¡ Á¤º¸´ÙÀ½ Á¦Ç°¿¡¼ DHCP Ŭ¶óÀÌ¾ðÆ® ±â´ÉÀ» Á¦°øÇÕ´Ï´Ù.
¾Æ·¡ ¿ä¾à Ŭ¶óÀÌ¾ðÆ® ¹× ÇÁ·Î¼¼½º ÆÐŶ ¼öÁØ ¼³¸íÀ» ´ÙÀ½¿¡ ¼¹ö »çÀÌÀÇ ´ëȸ¦ Å×À̺íÀÔ´Ï´Ù. Source Dest Source Dest Packet MAC addr MAC addr IP addr IP addr Description ----------------------------------------------------------------- Client Broadcast 0.0.0.0 255.255.255.255 DHCP Discover DHCPsrvr Broadcast DHCPsrvr 255.255.255.255 DHCP Offer Client Broadcast 0.0.0.0 255.255.255.255 DHCP Request DHCPsrvr Broadcast DHCPsrvr 255.255.255.255 DHCP ACK ÀÚ¼¼ÇÑ ´ëȸ¦ DHCP Ŭ¶óÀÌ¾ðÆ®¿Í DHCP ¼¹ö ´ÙÀ½°ú °°½À´Ï´Ù.: DHCPDISCOVER Ŭ¶óÀÌ¾ðÆ®°¡ DHCPDISCOVER ÆÐŶÀ» º¸³À´Ï´Ù. ´ÙÀ½Àº DHCPDISCOVER ÆÐŶ IP ¹× DHCP ºÎºÐÀ» º¸¿© ÁÖ´Â ³×Æ®¿öÅ© ¸ð´ÏÅÍ Ä¸Ã³ ¹ßÃéÇÑ °ÍÀÔ´Ï´Ù. IP ¼½¼Ç¿¡¼ 255.255.255.255 ´ë»ó ÁÖ¼Ò ¹× ¿øº» ÁÖ¼Ò¸¦ 0.0.0.0ÀÔ´Ï´Ù º¼ ¼ö ÀÖ½À´Ï´Ù. DHCP ¼½¼Ç °Ë»ö ÆÐŶ ÆÐŶÀ¸·Î ½Äº°ÇÏ°í µÎ À§Ä¡¿¡ ½ÇÁ¦ ³×Æ®¿öÅ© Ä«µå ÁÖ¼Ò¸¦ »ç¿ëÇϴ Ŭ¶óÀÌ¾ðÆ® ½Äº°ÇÕ´Ï´Ù. CHADDR ÇÊµå ¹× DHCP °ª Âü°í: Ŭ¶óÀÌ¾ðÆ® ½Äº°ÀÚ ÇÊµå µ¿ÀÏÇÕ´Ï´Ù.
IP: ID = 0x0; Proto = UDP; Len: 328
IP: Version = 4 (0x4)
IP: Header Length = 20 (0x14)
IP: Service Type = 0 (0x0)
IP: Precedence = Routine
IP: ...0.... = Normal Delay
IP: ....0... = Normal Throughput
IP: .....0.. = Normal Reliability
IP: Total Length = 328 (0x148)
IP: Identification = 0 (0x0)
IP: Flags Summary = 0 (0x0)
IP: .......0 = Last fragment in datagram
IP: ......0. = May fragment datagram if necessary
IP: Fragment Offset = 0 (0x0) bytes
IP: Time to Live = 128 (0x80)
IP: Protocol = UDP - User Datagram
IP: Checksum = 0x39A6
IP: Source Address = 0.0.0.0
IP: Destination Address = 255.255.255.255
IP: Data: Number of data bytes remaining = 308 (0x0134)
DHCP: Discover (xid=21274A1D)
DHCP: Op Code (op) = 1 (0x1)
DHCP: Hardware Type (htype) = 1 (0x1) 10Mb Ethernet
DHCP: Hardware Address Length (hlen) = 6 (0x6)
DHCP: Hops (hops) = 0 (0x0)
DHCP: Transaction ID (xid) = 556223005 (0x21274A1D)
DHCP: Seconds (secs) = 0 (0x0)
DHCP: Flags (flags) = 0 (0x0)
DHCP: 0............... = No Broadcast
DHCP: Client IP Address (ciaddr) = 0.0.0.0
DHCP: Your IP Address (yiaddr) = 0.0.0.0
DHCP: Server IP Address (siaddr) = 0.0.0.0
DHCP: Relay IP Address (giaddr) = 0.0.0.0
DHCP: Client Ethernet Address (chaddr) = 08002B2ED85E
DHCP: Server Host Name (sname) = <Blank>
DHCP: Boot File Name (file) = <Blank>
DHCP: Magic Cookie = [OK]
DHCP: Option Field (options)
DHCP: DHCP Message Type = DHCP Discover
DHCP: Client-identifier = (Type: 1) 08 00 2b 2e d8 5e
DHCP: Host Name = JUMBO-WS
DHCP: Parameter Request List = (Length: 7) 01 0f 03 2c 2e 2f 06
DHCP: End of this option field
DHCPOFFER DHCP ¼¹ö°¡ DHCPOFFER ÆÐŶÀ» º¸³» ÀÀ´äÇÕ´Ï´Ù. ĸó ¹ßÃéÇÑ ¾Æ·¡, ¿øº» IP ±¸¿ª¿¡¼ Áö±Ý DHCP ¼¹ö IP ÁÖ¼Ò¸¦ ÁÖ¼ÒÀÌ¸ç ºê·Îµåij½ºÆ® ÁÖ¼Ò°¡ 255.255.255.255ÀÎ ´ë»ó ÁÖ¼ÒÀÔ´Ï´Ù. DHCP ¼½¼ÇÀ» °°ÀÌ Á¦°ø ÆÐŶÀ» ½Äº°ÇÕ´Ï´Ù. YIADDR Çʵå´Â ¼¹ö°¡ Ŭ¶óÀÌ¾ðÆ®¿¡ Á¦°øÇÒ IP ÁּҷΠä¿öÁý´Ï´Ù. Âü°í CHADDR ÇÊµå ¿©ÀüÈ÷ ¿äû Ŭ¶óÀ̾ðÆ®ÀÇ ½ÇÁ¦ ÁÖ¼Ò°¡ µé¾î ÀÖ½À´Ï´Ù. ¶ÇÇÑ, ¿ì¸®´Â DHCP ¿É¼Ç ÇÊµå ¼½¼Ç¿¡¼ ÇØ´ç ¼¹ö¿¡¼ IP ÁÖ¼Ò ÇÔ²² Àü¼ÛµÇ´Â ´Ù¾çÇÑ ¿É¼ÇÀ» ÂüÁ¶ÇϽʽÿÀ. ÀÌ °æ¿ì ¼¹öÀÇ ¼ºê³Ý ¸¶½ºÅ©, ±âº» °ÔÀÌÆ®¿þÀÌ (¶ó¿ìÅÍ), ÀÓ´ë ½Ã°£ º¸³»±â, WINS ¼¹ö ÁÖ¼Ò (NetBIOS À̸§ ¼ºñ½º) ¹× NetBIOS ³ëµå Çü½Ä.
IP: ID = 0x3C30; Proto = UDP; Len: 328
IP: Version = 4 (0x4)
IP: Header Length = 20 (0x14)
IP: Service Type = 0 (0x0)
IP: Precedence = Routine
IP: ...0.... = Normal Delay
IP: ....0... = Normal Throughput
IP: .....0.. = Normal Reliability
IP: Total Length = 328 (0x148)
IP: Identification = 15408 (0x3C30)
IP: Flags Summary = 0 (0x0)
IP: .......0 = Last fragment in datagram
IP: ......0. = May fragment datagram if necessary
IP: Fragment Offset = 0 (0x0) bytes
IP: Time to Live = 128 (0x80)
IP: Protocol = UDP - User Datagram
IP: Checksum = 0x2FA8
IP: Source Address = 157.54.48.151
IP: Destination Address = 255.255.255.255
IP: Data: Number of data bytes remaining = 308 (0x0134)
DHCP: Offer (xid=21274A1D)
DHCP: Op Code (op) = 2 (0x2)
DHCP: Hardware Type (htype) = 1 (0x1) 10Mb Ethernet
DHCP: Hardware Address Length (hlen) = 6 (0x6)
DHCP: Hops (hops) = 0 (0x0)
DHCP: Transaction ID (xid) = 556223005 (0x21274A1D)
DHCP: Seconds (secs) = 0 (0x0)
DHCP: Flags (flags) = 0 (0x0)
DHCP: 0............... = No Broadcast
DHCP: Client IP Address (ciaddr) = 0.0.0.0
DHCP: Your IP Address (yiaddr) = 157.54.50.5
DHCP: Server IP Address (siaddr) = 0.0.0.0
DHCP: Relay IP Address (giaddr) = 0.0.0.0
DHCP: Client Ethernet Address (chaddr) = 08002B2ED85E
DHCP: Server Host Name (sname) = <Blank>
DHCP: Boot File Name (file) = <Blank>
DHCP: Magic Cookie = [OK]
DHCP: Option Field (options)
DHCP: DHCP Message Type = DHCP Offer
DHCP: Subnet Mask = 255.255.240.0
DHCP: Renewal Time Value (T1) = 8 Days, 0:00:00
DHCP: Rebinding Time Value (T2) = 14 Days, 0:00:00
DHCP: IP Address Lease Time = 16 Days, 0:00:00
DHCP: Server Identifier = 157.54.48.151
DHCP: Router = 157.54.48.1
DHCP: NetBIOS Name Service = 157.54.16.154
DHCP: NetBIOS Node Type = (Length: 1) 04
DHCP: End of this option field
DHCPREQUEST Ŭ¶óÀÌ¾ðÆ®°¡ DHCPOFFER ¼ö ÀÖ´Â DHCPREQUEST º¸³» ÀÀ´äÇÕ´Ï´Ù. ĸó ¾Æ·¡¿¡, ¿øº» IP ¼½¼Ç¿¡¼ Ŭ¶óÀ̾ðÆ®ÀÇ ÁÖ¼Ò¸¦ ¿©ÀüÈ÷ 0.0.0.0 ÀÌ¸ç ÆÐŶÀÌ ´ë»ó ¿©ÀüÈ÷ 255.255.255.255 ÀÔ´Ï´Ù. Ŭ¶óÀÌ¾ðÆ®°¡ Á¦°øÇÑ ÁÖ¼Ò¸¦ »ç¿ëÇÏ¿© ½ÃÀÛ ±¦Âú½À´Ï´Ù ¼¹ö¿¡¼ È®ÀÎ ¹ÞÀº ¾ÊÀº ¶§¹®¿¡ Ŭ¶óÀÌ¾ðÆ®°¡ 0.0.0.0À» À¯ÁöÇÕ´Ï´Ù. ´ë»óÀÌ µÑ ÀÌ»óÀÇ DHCP ¼¹ö¸¦ ÀÀ´äÇÑ ÀÖ½À´Ï´Ù Ŭ¶óÀÌ¾ðÆ®·Î ÀÌ·ç¾îÁø Á¦°ø¿¡ ´ëÇÑ ¿¹¾àÀ» º¸À¯Çϰí ÀÖ½À´Ï´Ù ¶§¹®¿¡ ¿©ÀüÈ÷ ºê·Îµåij½ºÆ®µË´Ï´Ù. ±×·¯¸é ´Ù¸¥ DHCP ¼¹ö°¡ Á¦°øµÈ ÁÖ¼Ò¸¦ ÇØÁ¦ÇÒ ¼ö ÀÖÀ¸¸ç »ç¿ë °¡´ÉÇÑ Ç®·Î ¹ÝȯÇÏ´Â ¾Ë°í. DHCP ¼½¼ÇÀ» ¿äû ÆÐŶÀ¸·Î ½Äº°Çϰí Á¦°øµÈ DHCP¸¦ »ç¿ëÇÏ¿© ÁÖ¼Ò¸¦ È®ÀÎÇÕ´Ï´Ù: ¿äû ÁÖ¼Ò Çʵå´Â. : DHCP ÀÓ´ë Á¦°øÇÏ´Â DHCP ¼¹öÀÇ IP ÁÖ¼Ò¸¦ ¼¹ö ½Äº°ÀÚ Çʵ带 º¸¿© ÁÝ´Ï´Ù.
IP: ID = 0x100; Proto = UDP; Len: 328
IP: Version = 4 (0x4)
IP: Header Length = 20 (0x14)
IP: Service Type = 0 (0x0)
IP: Precedence = Routine
IP: ...0.... = Normal Delay
IP: ....0... = Normal Throughput
IP: .....0.. = Normal Reliability
IP: Total Length = 328 (0x148)
IP: Identification = 256 (0x100)
IP: Flags Summary = 0 (0x0)
IP: .......0 = Last fragment in datagram
IP: ......0. = May fragment datagram if necessary
IP: Fragment Offset = 0 (0x0) bytes
IP: Time to Live = 128 (0x80)
IP: Protocol = UDP - User Datagram
IP: Checksum = 0x38A6
IP: Source Address = 0.0.0.0
IP: Destination Address = 255.255.255.255
IP: Data: Number of data bytes remaining = 308 (0x0134)
DHCP: Request (xid=21274A1D)
DHCP: Op Code (op) = 1 (0x1)
DHCP: Hardware Type (htype) = 1 (0x1) 10Mb Ethernet
DHCP: Hardware Address Length (hlen) = 6 (0x6)
DHCP: Hops (hops) = 0 (0x0)
DHCP: Transaction ID (xid) = 556223005 (0x21274A1D)
DHCP: Seconds (secs) = 0 (0x0)
DHCP: Flags (flags) = 0 (0x0)
DHCP: 0............... = No Broadcast
DHCP: Client IP Address (ciaddr) = 0.0.0.0
DHCP: Your IP Address (yiaddr) = 0.0.0.0
DHCP: Server IP Address (siaddr) = 0.0.0.0
DHCP: Relay IP Address (giaddr) = 0.0.0.0
DHCP: Client Ethernet Address (chaddr) = 08002B2ED85E
DHCP: Server Host Name (sname) = <Blank>
DHCP: Boot File Name (file) = <Blank>
DHCP: Magic Cookie = [OK]
DHCP: Option Field (options)
DHCP: DHCP Message Type = DHCP Request
DHCP: Client-identifier = (Type: 1) 08 00 2b 2e d8 5e
DHCP: Requested Address = 157.54.50.5
DHCP: Server Identifier = 157.54.48.151
DHCP: Host Name = JUMBO-WS
DHCP: Parameter Request List = (Length: 7) 01 0f 03 2c 2e 2f 06
DHCP: End of this option field
DHCPACK µû¶ó¼ ÃʱâÈ ÁֱⰡ ¿Ï·á DHCPACK ÇÔ²² DHCPREQUEST DHCP ¼¹ö°¡ ÀÀ´äÇÕ´Ï´Ù. DHCP ¼¹ö IP ÁÖ¼Ò¸¦ ¿øº» ÁÖ¼Ò ÀÌ¸ç ´ë»ó ÁÖ¼Ò ¿©ÀüÈ÷ 255.255.255.255 ÀÔ´Ï´Ù. Ŭ¶óÀÌ¾ðÆ® ÁÖ¼Ò CHADDR ¹× DHCP YIADDR Çʵ忡: ½ÇÁ¦ ÁÖ¼Ò¸¦ ¿äûÇϴ Ŭ¶óÀÌ¾ðÆ® ³×Æ®¿öÅ© Ä«µåÀÇ Å¬¶óÀÌ¾ðÆ® ½Äº°ÀÚ Çʵ尡 ÀÖ½À´Ï´Ù. DHCP ¿É¼Ç ±¸¿ªÀÇ ÆÐŶÀ» ACK.·Î ½Äº°ÇÕ´Ï´Ù.
IP: ID = 0x3D30; Proto = UDP; Len: 328
IP: Version = 4 (0x4)
IP: Header Length = 20 (0x14)
IP: Service Type = 0 (0x0)
IP: Precedence = Routine
IP: ...0.... = Normal Delay
IP: ....0... = Normal Throughput
IP: .....0.. = Normal Reliability
IP: Total Length = 328 (0x148)
IP: Identification = 15664 (0x3D30)
IP: Flags Summary = 0 (0x0)
IP: .......0 = Last fragment in datagram
IP: ......0. = May fragment datagram if necessary
IP: Fragment Offset = 0 (0x0) bytes
IP: Time to Live = 128 (0x80)
IP: Protocol = UDP - User Datagram
IP: Checksum = 0x2EA8
IP: Source Address = 157.54.48.151
IP: Destination Address = 255.255.255.255
IP: Data: Number of data bytes remaining = 308 (0x0134)
DHCP: ACK (xid=21274A1D)
DHCP: Op Code (op) = 2 (0x2)
DHCP: Hardware Type (htype) = 1 (0x1) 10Mb Ethernet
DHCP: Hardware Address Length (hlen) = 6 (0x6)
DHCP: Hops (hops) = 0 (0x0)
DHCP: Transaction ID (xid) = 556223005 (0x21274A1D)
DHCP: Seconds (secs) = 0 (0x0)
DHCP: Flags (flags) = 0 (0x0)
DHCP: 0............... = No Broadcast
DHCP: Client IP Address (ciaddr) = 0.0.0.0
DHCP: Your IP Address (yiaddr) = 157.54.50.5
DHCP: Server IP Address (siaddr) = 0.0.0.0
DHCP: Relay IP Address (giaddr) = 0.0.0.0
DHCP: Client Ethernet Address (chaddr) = 08002B2ED85E
DHCP: Server Host Name (sname) = <Blank>
DHCP: Boot File Name (file) = <Blank>
DHCP: Magic Cookie = [OK]
DHCP: Option Field (options)
DHCP: DHCP Message Type = DHCP ACK
DHCP: Renewal Time Value (T1) = 8 Days, 0:00:00
DHCP: Rebinding Time Value (T2) = 14 Days, 0:00:00
DHCP: IP Address Lease Time = 16 Days, 0:00:00
DHCP: Server Identifier = 157.54.48.151
DHCP: Subnet Mask = 255.255.240.0
DHCP: Router = 157.54.48.1
DHCP: NetBIOS Name Service = 157.54.16.154
DHCP: NetBIOS Node Type = (Length: 1) 04
DHCP: End of this option field
ÀÌÀü¿¡ ÇÒ´çµÈ IP ÁÖ¼Ò¸¦ DHCP Ŭ¶óÀÌ¾ðÆ®°¡ °¡Áø ´Ù½Ã ½ÃÀÛµÉ °æ¿ì Ŭ¶óÀÌ¾ðÆ®´Â Æ¯È÷ Ư¼ö DHCPREQUEST ÆÐŶ ÀÌÀü¿¡ ÀÓ´ëµÈ IP ÁÖ¼Ò¸¦ ¿äûÇÕ´Ï´Ù. ¿øº» ÁÖ¼Ò 0.0.0.0Àº ÀÌ¸ç ´ë»ó ºê·Îµåij½ºÆ® ÁÖ¼Ò´Â 255.255.255.255 ÀÔ´Ï´Ù. Microsoft Ŭ¶óÀÌ¾ðÆ®°¡ DHCP ¿É¼Ç Çʵå DHCP ä¿ï: ÀÌÀü¿¡ ÇÒ´çµÈ ÁÖ¼Ò°¡ ÁÖ¼Ò ¿äû. ¾ö°ÝÇÏ°Ô RFC ±Ô°Ý Ŭ¶óÀÌ¾ðÆ®´Â ¿äûÇÑ ÁÖ¼Ò¸¦ CIADDR Çʵå ä¿öÁý´Ï´Ù. Microsoft DHCP ¼¹ö Çϳª¸¦ »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù.
IP: ID = 0x0; Proto = UDP; Len: 328
IP: Version = 4 (0x4)
IP: Header Length = 20 (0x14)
IP: Service Type = 0 (0x0)
IP: Precedence = Routine
IP: ...0.... = Normal Delay
IP: ....0... = Normal Throughput
IP: .....0.. = Normal Reliability
IP: Total Length = 328 (0x148)
IP: Identification = 0 (0x0)
IP: Flags Summary = 0 (0x0)
IP: .......0 = Last fragment in datagram
IP: ......0. = May fragment datagram if necessary
IP: Fragment Offset = 0 (0x0) bytes
IP: Time to Live = 128 (0x80)
IP: Protocol = UDP - User Datagram
IP: Checksum = 0x39A6
IP: Source Address = 0.0.0.0
IP: Destination Address = 255.255.255.255
IP: Data: Number of data bytes remaining = 308 (0x0134)
DHCP: Request (xid=2757554E)
DHCP: Op Code (op) = 1 (0x1)
DHCP: Hardware Type (htype) = 1 (0x1) 10Mb Ethernet
DHCP: Hardware Address Length (hlen) = 6 (0x6)
DHCP: Hops (hops) = 0 (0x0)
DHCP: Transaction ID (xid) = 660034894 (0x2757554E)
DHCP: Seconds (secs) = 0 (0x0)
DHCP: Flags (flags) = 0 (0x0)
DHCP: 0............... = No Broadcast
DHCP: Client IP Address (ciaddr) = 0.0.0.0
DHCP: Your IP Address (yiaddr) = 0.0.0.0
DHCP: Server IP Address (siaddr) = 0.0.0.0
DHCP: Relay IP Address (giaddr) = 0.0.0.0
DHCP: Client Ethernet Address (chaddr) = 08002B2ED85E
DHCP: Server Host Name (sname) = <Blank>
DHCP: Boot File Name (file) = <Blank>
DHCP: Magic Cookie = [OK]
DHCP: Option Field (options)
DHCP: DHCP Message Type = DHCP Request
DHCP: Client-identifier = (Type: 1) 08 00 2b 2e d8 5e
DHCP: Requested Address = 157.54.50.5
DHCP: Host Name = JUMBO-WS
DHCP: Parameter Request List = (Length: 7) 01 0f 03 2c 2e 2f 06
DHCP: End of this option field
ÀÌ ½ÃÁ¡¿¡¼ ¼¹ö°¡ ¼öµµ ÀÖ°í ÀÀ´äÇÒ ¼ö ÀÖ½À´Ï´Ù. Windows NT DHCP ¼¹öÀÇ µ¿ÀÛÀ» superscoping °°Àº ´Ù¸¥ ¿äÀο¡ »Ó¸¸ ¾Æ´Ï¶ó »ç¿ë ÁßÀÎ ¿î¿µ üÁ¦ ¹öÀü¿¡ µû¶ó ´Þ¶óÁý´Ï´Ù. Ŭ¶óÀÌ¾ðÆ®°¡ ÁÖ¼Ò¸¦ °è¼Ó »ç¿ëÇÒ ¼ö ÀÖ´Â ¼¹ö¸¦ °áÁ¤ÇÏ´Â °æ¿ì ±× Áß Çϳª¸¦ ÀÚµ¿ ³²¾Æ ¶Ç´Â ACK ÀÖ´Â DHCPREQUEST. Ŭ¶óÀÌ¾ðÆ®°¡ ÁÖ¼Ò¸¦ °¡Áú ¼ö ¾ø½À´Ï´Ù ¼¹ö¸¦ °áÁ¤ÇÏ´Â °æ¿ì ÇÑ NACK¸¦ º¸³À´Ï´Ù.
IP: ID = 0x3F1A; Proto = UDP; Len: 328
IP: Version = 4 (0x4)
IP: Header Length = 20 (0x14)
IP: Service Type = 0 (0x0)
IP: Precedence = Routine
IP: ...0.... = Normal Delay
IP: ....0... = Normal Throughput
IP: .....0.. = Normal Reliability
IP: Total Length = 328 (0x148)
IP: Identification = 16154 (0x3F1A)
IP: Flags Summary = 0 (0x0)
IP: .......0 = Last fragment in datagram
IP: ......0. = May fragment datagram if necessary
IP: Fragment Offset = 0 (0x0) bytes
IP: Time to Live = 128 (0x80)
IP: Protocol = UDP - User Datagram
IP: Checksum = 0x2CBE
IP: Source Address = 157.54.48.151
IP: Destination Address = 255.255.255.255
IP: Data: Number of data bytes remaining = 308 (0x0134)
DHCP: NACK (xid=74A005CE)
DHCP: Op Code (op) = 2 (0x2)
DHCP: Hardware Type (htype) = 1 (0x1) 10Mb Ethernet
DHCP: Hardware Address Length (hlen) = 6 (0x6)
DHCP: Hops (hops) = 0 (0x0)
DHCP: Transaction ID (xid) = 1956644302 (0x74A005CE)
DHCP: Seconds (secs) = 0 (0x0)
DHCP: Flags (flags) = 0 (0x0)
DHCP: 0............... = No Broadcast
DHCP: Client IP Address (ciaddr) = 0.0.0.0
DHCP: Your IP Address (yiaddr) = 0.0.0.0
DHCP: Server IP Address (siaddr) = 0.0.0.0
DHCP: Relay IP Address (giaddr) = 0.0.0.0
DHCP: Client Ethernet Address (chaddr) = 08002B2ED85E
DHCP: Server Host Name (sname) = <Blank>
DHCP: Boot File Name (file) = <Blank>
DHCP: Magic Cookie = [OK]
DHCP: Option Field (options)
DHCP: DHCP Message Type = DHCP NACK
DHCP: Server Identifier = 157.54.48.151
DHCP: End of this option field
Ŭ¶óÀÌ¾ðÆ®´Â ´ÙÀ½ °Ë»ö ÇÁ·Î¼¼½º¸¦ ½ÃÀÛÇÕ´Ï´Ù ÀÖÁö¸¸ DHCPDISCOVER ÆÐŶ °°Àº ÁÖ¼Ò ÀӴ븦 °è¼Ó ½ÃµµÇÕ´Ï´Ù. ¸¹Àº °æ¿ì¿¡ tth Ŭ¶óÀÌ¾ðÆ® °°Àº ÁÖ¼Ò¸¦ °¡Á®¿Ã ¼ö ÀÖÁö¸¸ ¾øÀ» ¼ö ÀÖ½À´Ï´Ù.
IP: ID = 0x100; Proto = UDP; Len: 328
IP: Version = 4 (0x4)
IP: Header Length = 20 (0x14)
IP: Service Type = 0 (0x0)
IP: Precedence = Routine
IP: ...0.... = Normal Delay
IP: ....0... = Normal Throughput
IP: .....0.. = Normal Reliability
IP: Total Length = 328 (0x148)
IP: Identification = 256 (0x100)
IP: Flags Summary = 0 (0x0)
IP: .......0 = Last fragment in datagram
IP: ......0. = May fragment datagram if necessary
IP: Fragment Offset = 0 (0x0) bytes
IP: Time to Live = 128 (0x80)
IP: Protocol = UDP - User Datagram
IP: Checksum = 0x38A6
IP: Source Address = 0.0.0.0
IP: Destination Address = 255.255.255.255
IP: Data: Number of data bytes remaining = 308 (0x0134)
DHCP: Discover (xid=3ED14752)
DHCP: Op Code (op) = 1 (0x1)
DHCP: Hardware Type (htype) = 1 (0x1) 10Mb Ethernet
DHCP: Hardware Address Length (hlen) = 6 (0x6)
DHCP: Hops (hops) = 0 (0x0)
DHCP: Transaction ID (xid) = 1053902674 (0x3ED14752)
DHCP: Seconds (secs) = 0 (0x0)
DHCP: Flags (flags) = 0 (0x0)
DHCP: 0............... = No Broadcast
DHCP: Client IP Address (ciaddr) = 0.0.0.0
DHCP: Your IP Address (yiaddr) = 0.0.0.0
DHCP: Server IP Address (siaddr) = 0.0.0.0
DHCP: Relay IP Address (giaddr) = 0.0.0.0
DHCP: Client Ethernet Address (chaddr) = 08002B2ED85E
DHCP: Server Host Name (sname) = <Blank>
DHCP: Boot File Name (file) = <Blank>
DHCP: Magic Cookie = [OK]
DHCP: Option Field (options)
DHCP: DHCP Message Type = DHCP Discover
DHCP: Client-identifier = (Type: 1) 08 00 2b 2e d8 5e
DHCP: Requested Address = 157.54.51.5
DHCP: Host Name = JUMBO-WS
DHCP: Parameter Request List = (Length: 7) 01 0f 03 2c 2e 2f 06
DHCP: End of this option field
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