Transcription of 14. TCP/IP Protocol Suite
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14. TCP/IP Protocol Suite
11/10/2010114. TCP/IP Protocol SuiteContentsa. TCP/IP Internet OSIb. Network level IP protocolc. Addressing and sub-networksd. Other network-level protocolseTransport level11/10/20102a. TCP/IP Internet OSIb. Network level IP Protocol 11/10/20103 Position of IPv4 in TCP/IP Protocol suiteIPv4 datagram format11/10/20104 Service type or differentiated servicesThe precedence subfield was part of version 4, but never of serviceDefault types of service11/10/20106 Values for codepointsThe total length field defines the total length of the datagram including the of a small datagram in an Ethernet frameProtocol field and encapsulated data11/10/20108 Protocol valuesAn IPv4 packet has arrived with the first 8 bits as shown:01000010 ThididthktWh ?Example 1 Thereceiverdiscardsthe is an error in this packet. The 4 leftmost bits (0100) show the version, which is correct. The next 4 bits (0010) show an invalid header length (2 4 = 8). The minimum number of bytes in the header must be 20.
The precedence subfield was part of version 4, but never used. 11/10/2010 5 Types of service Default types of service. 11/10/2010 6 Values for codepoints ... The protocol field is the next byte (02), which means that the upper-layer protocol is IGMP. Maximum transfer unit …
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