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Introduction to Networking

Introduction to Networking. Andrew Hamilton TJ IT Technician. Networks. Connect Computers together Share resources Printers Storage Internet Access Applications. LANs vs WANs. Local Area Network Internal to one site Wide Area Network Connect multiple sites together The Internet

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Introduction to Networking

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  1. Introduction to Networking Andrew Hamilton TJ IT Technician

  2. Networks • Connect Computers together • Share resources • Printers • Storage • Internet Access • Applications

  3. LANs vs WANs • Local Area Network • Internal to one site • Wide Area Network • Connect multiple sites together • The Internet • A very large WAN

  4. OSI Model http://homepages.uel.ac.uk/u0415051/OSI%20MODEL/OSI_Model-image.jpg

  5. Layer 1: Physical • The actual paths for data to travel on • Multitude of standards • Ethernet (Copper or Fiber) • Wireless • ATM • Dialup • DSL • MoCA

  6. Layer 2: Data Link • Operates based on MAC Address • Wireless Access Points (WAPs) • Switches • Hubs • Bridges

  7. Layer 3: Network Layer • Packets • Operates on Internet Protocol (IP Address) • IPv4 • IPv6 • Routers • L3 Switches • Address Resolution Protocol (ARP) • Neighbor Discovery Protocol (NDP) • Firewalls

  8. Layer 3: IP Addressing • IPv4 (198.38.16.47) • IPv6 • 2001:468:cc0:1600:0:c6ff:fe26:102f • 2001:468cc0:1600::c6ff:fe26:102f • Netmasks • 255.255.254.0 • 2001:468:cc0:1600::/64

  9. Layer 3: Reserved Addrs • IPv4 • 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16 • 224.0.0.0/4 (multicast) • IPv6 • Fe80::/10 (link local) • Fc00::/7 (unique local addresses)

  10. Layer 4: Transport Layer • Protocols • User Datagram Protocol (UDP) • Transmission Control Protocol (TCP) • Internet Control Message Protocol (ICMP) • Ports • Permanent (0-1023) • Registered (1024-49151) • Dynamic (49152-65535)

  11. Upper Layers • Layer 5: Session Layer • Layer 6: Presentation Layer • Layer 7: Application Layer • “Layer 8”: User Layer • “Layer 9”: Religious/Political Layer

  12. Utilities • ipconfig / ifconfig • ping / ping6 • arp • nslookup • tracert / traceroute(6)

  13. Any Questions? • Contact Info: • ahamilto@tjhsst.edu • www.tjhsst.edu/~ahamilto/josti2010/

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