TAILIEUCHUNG - TCP/IP Network Administration- P7

Tham khảo tài liệu 'tcp/ip network administration- p7', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | file C mynapster Downloads warez tcpip Previous Internet Layer TCP IP Network Next Application Layer Administration Internet Layer Book Index Application Layer Library Home DNS BIND TCP IP sendmail sendmail Reference Firewalls Practical Security Please purchase PDF Split-Merge on to remove this watermark. file C mynapster Downloads warez tcpip 5 of 5 2001-10-15 09 18 16 Chapter 1 Internet Layer Next Transport Layer Previous Network Access Layer Chapter 1 Overview of TCP IP Internet Layer The layer above the Network Access Layer in the protocol hierarchy is the Internet Layer. The Internet Protocol RFC 791 is the heart of TCP IP and the most important protocol in the Internet Layer. IP provides the basic packet delivery service on which TCP IP networks are built. All protocols in the layers above and below IP use the Internet Protocol to deliver data. All TCP IP data flows through IP incoming and outgoing regardless of its final destination. Internet Protocol The Internet Protocol is the building block of the Internet. Its functions include Defining the datagram which is the basic unit of transmission in the Internet Defining the Internet addressing scheme Moving data between the Network Access Layer and the Host-to-Host Transport Layer Routing datagrams to remote hosts Performing fragmentation and re-assembly of datagrams Before describing these functions in more detail let s look at some of IP s characteristics. First IP is a connectionless protocol. This means that IP does not exchange control information called a handshake to establish an end-to-end connection before transmitting data. In contrast a connection-oriented protocol exchanges control information with the remote system to verify that it is ready to receive data before any data is sent. When the handshaking is successful the systems are said to have established a connection. Internet Protocol relies on protocols in other .

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