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Chapter 1 Linux and TCP

2. Linux and TCP/IP Implementations. The first widely available release of TCP/IP implementation: the 4.2 Berkeley Software Distribution (BSD)Unix TCP/IP implementationsSolarisFreeBSDLinux. 3. Networking Code Organization. Most applications are implemented as user space processes.Protocols are

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Chapter 1 Linux and TCP

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    2. 2 Linux and TCP/IP Implementations The first widely available release of TCP/IP implementation: the 4.2 Berkeley Software Distribution (BSD) Unix TCP/IP implementations Solaris FreeBSD Linux

    3. 3 Networking Code Organization Most applications are implemented as user space processes. Protocols are implemented in the system kernel Socket layer Protocol layer Interface layer

    4. 4 Network Daemons and Services Daemon: a process running in the background of the system. Inetd (xinetd in Red Hat Linux 9) Httpd Named Port numbers Well-known port numbers, used by servers Ephemeral port numbers, used by clients The port number and IP address pairs of the server and client preserve the uniqueness of a communication session.

    5. 5 Network Configurations Files When a host is configured to boot locally, TCP/IP configuration parameters are stored in files. When the system boots up, parameters are read from the files and used to configure the daemons and the network interface. A parameter may be changed by editing the corresponding configuration file.

    6. 6 Linux Commands and Tools Basic Linux commands: man, passwd, ls, etc. Text editor vi Other text editors: Emacs, gedit, OpenOffice.org Window Dump Using floppy disks

    7. 7 Diagnostic Tools Tcpdump Ethereal

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