TCP/IP Reference Materials

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TCP/IP
Reference Materials
TCP/IP Reference – SANS GIAC LevelTwo
- ©2000, 2001
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Referenced Links
• Ethernet vendor codes:
www.cavebear.com/CaveBear/Ethernet/vendor.html
• Port assignments, IP protocols, general reference:
ftp.isi.edu/in-notes/iana/assignments
TCP/IP Reference – SANS GIAC LevelTwo
- ©2000, 2001
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Recommended Reading
• TCP/IP Illustrated, Volume 1 The Protocols –W.
Richard Stevens
• Internetworking with TCP/IP Volume 1
–Douglas
Comer
• Internet Core Protocols
– Eric A. Hall
TCP/IP Reference – SANS GIAC LevelTwo
- ©2000, 2001
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IP Header
0 15 16 31
20
bytes
4-bit 4-bit IP 8-bit TOS 16-bit total length (in bytes)
version header
length
16-bit IP identification number 3-bit
flags
13-bit fragment offset
8-bit time to live
(TTL)
8-bit protocol
16-bit header checksum
32-bit source IP address
32-bit destination IP address
options (if any)
data
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TCP Header
0 15 16 31
20
bytes
options (if any)
data (if any)
16-bit source port number 16-bit destination port number
32-bit sequence number

32-bit acknowledgement number
4-bit
header
length
reserved
(6-bits)
U A P R S F
R C S S Y I
G K H T N N
16-bit window size
16-bit checksum
16-bit urgent pointer
.
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