Networking Overview CTIN February 10, 2000 Sandy Bacik, Senior Security Consultant Breakwater Security Associates
Agenda <ul><li>Terminology </li></ul><ul><li>Network technologies and architectures </li></ul><ul><li>Operating systems </...
Terminology Server Client <ul><ul><li>A computer on the network </li></ul></ul><ul><ul><ul><li>BUT shares resources </li><...
Terminology NIC <ul><ul><li>Network Interface Card, network adaptor </li></ul></ul>LAN <ul><ul><li>Local Area Network, phy...
Terminology WAN <ul><ul><li>Wide Area Network </li></ul></ul>MAN <ul><ul><li>Metropolitan Area Network </li></ul></ul>
Types of Networks <ul><li>Peer-to-Peer </li></ul><ul><li>Server Based </li></ul>
Peer-to-Peer
Server-Based
Network Topologies <ul><li>Bus </li></ul><ul><li>Star </li></ul><ul><li>Ring </li></ul><ul><li>Combination: Star Bus </li>...
Bus Network Topology
Star Network Topology
Ring Network Topology
Star Bus Network Topology
Star Ring Network Topology
Mesh Network Topology
Network Architecture <ul><li>Ethernet </li></ul><ul><li>Token Ring </li></ul><ul><li>ARCNet </li></ul><ul><li>AppleTalk </...
Network Protocols <ul><li>TCP/IP </li></ul><ul><li>IPX/SPX </li></ul><ul><li>NetBEUI </li></ul>
Reference Model
TCP/IP related to OSI stack
IPX/SPX related to OSI stack
NetBEUI related to OSI stack
TCP Session Setup Session setup using 3-way handshake
TCP Session Termination Aborting a connection (reset)
UDP Packet Header information <ul><li>Source Port </li></ul><ul><li>Destination Port </li></ul><ul><li>Datagram Length </l...
TCP Packet Header information <ul><li>Source Port </li></ul><ul><li>Destination Port </li></ul><ul><li>Sequence Number </l...
Network Operating Systems <ul><li>Novell Netware </li></ul><ul><li>Windows NT </li></ul><ul><li>UNIX </li></ul>
IP Addresses 192  .  168  .  124  .  123 http://www.cisco.com/univercd/cc/td/doc/product/software/ssr90/ptc_r_90/54084.htm
Request for Comments (RFC) http://www.rfc-editor.org/rfcsearch.html Use search engines to look for specific RFCs or topics...
Subnet Masking 255.0.0.0 Class A 255.255.0.0 Class B 255.255.255.0 Class C
DNS Top-Level Domains .com .edu .gov .mil .net .org .int . xx
Internet Services <ul><li>WWW </li></ul><ul><li>Electronic Mail  </li></ul><ul><li>FTP </li></ul><ul><li>Newsgroups </li><...
Thank you Contact: Sandy Bacik email: san04@att.net phone: 253-661-9327
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Networking Overview

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  • Networking Overview

    1. 1. Networking Overview CTIN February 10, 2000 Sandy Bacik, Senior Security Consultant Breakwater Security Associates
    2. 2. Agenda <ul><li>Terminology </li></ul><ul><li>Network technologies and architectures </li></ul><ul><li>Operating systems </li></ul><ul><li>IP addresses and domains </li></ul><ul><li>Internet </li></ul>
    3. 3. Terminology Server Client <ul><ul><li>A computer on the network </li></ul></ul><ul><ul><ul><li>BUT shares resources </li></ul></ul></ul><ul><ul><li>A computer on the network </li></ul></ul><ul><ul><ul><li>BUT uses the shared resources </li></ul></ul></ul>
    4. 4. Terminology NIC <ul><ul><li>Network Interface Card, network adaptor </li></ul></ul>LAN <ul><ul><li>Local Area Network, physical cable limitation of 500-600 feet </li></ul></ul>
    5. 5. Terminology WAN <ul><ul><li>Wide Area Network </li></ul></ul>MAN <ul><ul><li>Metropolitan Area Network </li></ul></ul>
    6. 6. Types of Networks <ul><li>Peer-to-Peer </li></ul><ul><li>Server Based </li></ul>
    7. 7. Peer-to-Peer
    8. 8. Server-Based
    9. 9. Network Topologies <ul><li>Bus </li></ul><ul><li>Star </li></ul><ul><li>Ring </li></ul><ul><li>Combination: Star Bus </li></ul><ul><ul><ul><ul><ul><li>Star Ring </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Mesh </li></ul></ul></ul></ul></ul>
    10. 10. Bus Network Topology
    11. 11. Star Network Topology
    12. 12. Ring Network Topology
    13. 13. Star Bus Network Topology
    14. 14. Star Ring Network Topology
    15. 15. Mesh Network Topology
    16. 16. Network Architecture <ul><li>Ethernet </li></ul><ul><li>Token Ring </li></ul><ul><li>ARCNet </li></ul><ul><li>AppleTalk </li></ul><ul><li>FDDI </li></ul>
    17. 17. Network Protocols <ul><li>TCP/IP </li></ul><ul><li>IPX/SPX </li></ul><ul><li>NetBEUI </li></ul>
    18. 18. Reference Model
    19. 19. TCP/IP related to OSI stack
    20. 20. IPX/SPX related to OSI stack
    21. 21. NetBEUI related to OSI stack
    22. 22. TCP Session Setup Session setup using 3-way handshake
    23. 23. TCP Session Termination Aborting a connection (reset)
    24. 24. UDP Packet Header information <ul><li>Source Port </li></ul><ul><li>Destination Port </li></ul><ul><li>Datagram Length </li></ul><ul><li>Checksum </li></ul>
    25. 25. TCP Packet Header information <ul><li>Source Port </li></ul><ul><li>Destination Port </li></ul><ul><li>Sequence Number </li></ul><ul><li>Acknowledgement Number </li></ul><ul><li>Header Length </li></ul><ul><li>Flags </li></ul><ul><li>Window Advertisement </li></ul><ul><li>Checksum </li></ul><ul><li>Urgent Pointer </li></ul>
    26. 26. Network Operating Systems <ul><li>Novell Netware </li></ul><ul><li>Windows NT </li></ul><ul><li>UNIX </li></ul>
    27. 27. IP Addresses 192 . 168 . 124 . 123 http://www.cisco.com/univercd/cc/td/doc/product/software/ssr90/ptc_r_90/54084.htm
    28. 28. Request for Comments (RFC) http://www.rfc-editor.org/rfcsearch.html Use search engines to look for specific RFCs or topics for an RFC
    29. 29. Subnet Masking 255.0.0.0 Class A 255.255.0.0 Class B 255.255.255.0 Class C
    30. 30. DNS Top-Level Domains .com .edu .gov .mil .net .org .int . xx
    31. 31. Internet Services <ul><li>WWW </li></ul><ul><li>Electronic Mail </li></ul><ul><li>FTP </li></ul><ul><li>Newsgroups </li></ul><ul><li>Telnet </li></ul><ul><li>Gopher </li></ul>
    32. 32. Thank you Contact: Sandy Bacik email: san04@att.net phone: 253-661-9327

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