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The Foundation presents



  Third Thursday:
The Evolving Internet
 and Your Business
           May 17, 2007
Thanks to Dunwoody College




      www.dunwoody.edu
Timeline
• 1992 - Email/FTP
• 1995 - Websites
• 1997 - Web browsing
• 1998 - Google
• 2002 - Intranet (SharePoint - 04-06)...
2007 Maturing of Techs
• Virtualization
• Offsite
• DR
• Remote Backup
• ASP Models
• Online ERP apps
• Sharepont
• Large ...
The OSI Model
Data        Application     (telnet, http)

Data        Presentation (e-mail, mime)
Data        Session (nam...
Where it’s at - Layers 1-3
 Packets         Network (IP, IPSec, ARP)
 Frames          Data Link (Ethernet, Fibre, 802.11g/...
Switches




Frames   Data Link (Ethernet, Fibre, 802.11g/n)
What is a switch, really?
• Larry’s definition: Creates one or many
  independent networks, enables concurrent
  communicat...
Isn’t that just like a hub?
• A hub is a Layer 1 device
• Permits physical connection, but offers no traffic
  discretion
•...
Types of switches
• Unmanaged - No configuration interface or
  options
• Managed - Wide variety of configuration
  options
...
What can I do with
          a (good)switch?
• Use Ethernet, Fibre Channel, wireless
• Seamlessly traverse all of these me...
Switches handle Frames

 80 00 20 7A 3F 3E              80 00 20 20 3A AE       80 00
 Destination MAC Address           S...
Component parts of a Frame
Setting port priority
• Used in tandem with other policies to ensure quality of
  service
• There is a business need for c...
Making a VLAN
• Used in tandem with other policies to ensure quality of
  service
• Carves up the network into traffic grou...
A simple VLAN
Trunking
• Used in tandem with other policies to ensure quality of
  service
• At the simplest level, allows you to bundle...
A simple trunk
Why are good switches
             important?
• In combination with power and cabling, the basis of your
  communication
•...
Routers




Packets   Network (IP, IPSec, ARP)
Routers are intersections
What is a router, really?
• Larry’s definition: A junction between one or
  more networks
• Focuses on the IP address level...
What can I do with a router?

• NAT (Network address translation)
• Route IP traffic between different networks
• Move traf...
NAT explained
• Converts real world addresses to local addresses
• Acts as a natural firewall to prevent incoming requests
...
Route IP Between Networks
• Enables you to get from point A to point B. Even
  though it’s often more like point A to poin...
1 Destination - 11 hops
                    Example of IP routing
 1 10.55.93.1 (10.55.93.1) 2.142 ms 2.445 ms 4.400 ms
 2...
Intra-VLAN Routing
VPN
• Router acts a traffic cop as always
• Defines and limits access to certain areas on local
  network from outside
• Bui...
Big World VPN
Why do I need a decent router?
• What’s better than having a traffic light? An intelligent
  cop at every corner
• 80% of n...
The Big Picture
• The basis of your business begins at power
• How you connect to that power (your wires)
• What interface...
THE FOUNDATION
311 7th Avenue North Mpls, MN
        612-465-0700
    www.fndtn.com
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The Evolving Internet Fndtn

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A quick simple presentation about how a company needs to use the OSI Model to look at building their network. Power, Cabling, Routers, and Switches are the most important items to start with; they are the foundation of your companies infrastructure!

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The Evolving Internet Fndtn

  1. 1. The Foundation presents Third Thursday: The Evolving Internet and Your Business May 17, 2007
  2. 2. Thanks to Dunwoody College www.dunwoody.edu
  3. 3. Timeline • 1992 - Email/FTP • 1995 - Websites • 1997 - Web browsing • 1998 - Google • 2002 - Intranet (SharePoint - 04-06) • 2003 - Disaster Recovery Planning • Broadband and High Bandwidth • 2004 - VoIP
  4. 4. 2007 Maturing of Techs • Virtualization • Offsite • DR • Remote Backup • ASP Models • Online ERP apps • Sharepont • Large Pipes
  5. 5. The OSI Model Data Application (telnet, http) Data Presentation (e-mail, mime) Data Session (named sockets) Segments Transport (TCP, UDP) Packets Network (IP, IPSec, ARP) Frames Data Link (Ethernet, Fibre, 802.11g/n) Bits Physical (hubs, 10-BaseT)
  6. 6. Where it’s at - Layers 1-3 Packets Network (IP, IPSec, ARP) Frames Data Link (Ethernet, Fibre, 802.11g/n) Bits Physical (hubs, 10-BaseT) • Ethernet - Layers 1,2 - both interface and transport • Switches are at Layer 2 • Routers are at Layer 3
  7. 7. Switches Frames Data Link (Ethernet, Fibre, 802.11g/n)
  8. 8. What is a switch, really? • Larry’s definition: Creates one or many independent networks, enables concurrent communication at different speeds • Focuses on the MAC address level • Decides path for frames • Allows full-duplexing - talking at the same time
  9. 9. Isn’t that just like a hub? • A hub is a Layer 1 device • Permits physical connection, but offers no traffic discretion • Traffic can be seen and/or collide from all ports in any direction • The ultimate in unmanaged networking
  10. 10. Types of switches • Unmanaged - No configuration interface or options • Managed - Wide variety of configuration options • Smart - Limited version of managed switch • Gigabit - Highest wire-based speed for commercial applications. Highest collision probability too!
  11. 11. What can I do with a (good)switch? • Use Ethernet, Fibre Channel, wireless • Seamlessly traverse all of these mediums • Set port priority • Filter traffic per device • Create VLAN’s (Virtual Local Access Networks) • Use spanning trees to detect your network construction • Monitor links using SNMP • Bonding/Trunking
  12. 12. Switches handle Frames 80 00 20 7A 3F 3E 80 00 20 20 3A AE 80 00 Destination MAC Address Source MAC Address EtherType MAC Header (14 bytes) IP, ARP, etc. Payload Data (46-1500 bytes) 00 20 20 3A CRC Checksum (4 Bytes) Ethernet Type III Frame (64-1518 bytes)
  13. 13. Component parts of a Frame
  14. 14. Setting port priority • Used in tandem with other policies to ensure quality of service • There is a business need for certain groups to have a data priority • Certain physical ports assigned to purposes greater than others • Best use: Bandwidth needed at all costs (VoIP, graphics team)
  15. 15. Making a VLAN • Used in tandem with other policies to ensure quality of service • Carves up the network into traffic groups • Common uses: storage areas,VoIP • Ports are tagged with a VLAN identifier across switches
  16. 16. A simple VLAN
  17. 17. Trunking • Used in tandem with other policies to ensure quality of service • At the simplest level, allows you to bundle VLANs and ports together - benefits of aggregation • Focus on distribution of resources for optimal network function
  18. 18. A simple trunk
  19. 19. Why are good switches important? • In combination with power and cabling, the basis of your communication • 80% of network failures occur in Layers 1-3 • Detection not possible on low-end switches • Assuring quality connections becomes possible • Can replace many other devices in a single management center • Port negotiation issues between vendors - code updates across the board - standardization helps network support as well.
  20. 20. Routers Packets Network (IP, IPSec, ARP)
  21. 21. Routers are intersections
  22. 22. What is a router, really? • Larry’s definition: A junction between one or more networks • Focuses on the IP address level • Decides path for packets • Edge or core: Home users are familiar with edge routers that connect to the Internet, core routers work within a network
  23. 23. What can I do with a router? • NAT (Network address translation) • Route IP traffic between different networks • Move traffic between VLAN’s • VPN (Virtual Private Network)
  24. 24. NAT explained • Converts real world addresses to local addresses • Acts as a natural firewall to prevent incoming requests • Tracks destinations and ports - different NAT types allow/restrict more heavily • Problem services that must be addressed: FTP, IPSec (VPN), VoIP
  25. 25. Route IP Between Networks • Enables you to get from point A to point B. Even though it’s often more like point A to point Z. • A well-honed configuration table keeps paths well defined. • In smaller networks, an important traffic cop for intelligent handling of communication
  26. 26. 1 Destination - 11 hops Example of IP routing 1 10.55.93.1 (10.55.93.1) 2.142 ms 2.445 ms 4.400 ms 2 71.5.110.1 (71.5.110.1) 117.125 ms 122.690 ms 120.718 ms 3 71.5.107.161 (71.5.107.161) 123.949 ms 134.323 ms 130.106 ms 4 67.109.64.93.ptr.us.xo.net (67.109.64.93) 127.231 ms 139.356 ms 144.822 ms 5 p6-3-0-0.mar2.chicago-il.us.xo.net (207.88.84.61) 159.507 ms 149.822 ms 6 p4-2-0-0.rar2.chicago-il.us.xo.net (65.106.6.205) 168.493 ms 164.606 ms 7 p1-0.ir1.chicago2-il.us.xo.net (65.106.6.138) 169.688 ms 182.233 ms 8 206.111.2.14.ptr.us.xo.net (206.111.2.14) 244.645 ms 342.918 ms 9 yahoo-4.ar2.dca3.gblx.net (64.208.110.122) 227.710 ms 214.968 ms 10 ge-1-0-0-p110.msr2.dcn.yahoo.com (216.115.108.45) 231.577 ms ge-1-0-0- p100.msr1.dcn.yahoo.com (216.115.108.41) 111.548 ms 140.541 ms 11 ge3-1.bas1-m.dcn.yahoo.com (216.109.120.149) 151.243 ms ge10-2.bas2- m.dcn.yahoo.com (216.109.120.249) 186.563 ms ge7-2.bas1-m.dcn.yahoo.com (216.109.120.201) 197.609 ms
  27. 27. Intra-VLAN Routing
  28. 28. VPN • Router acts a traffic cop as always • Defines and limits access to certain areas on local network from outside • Builds a bridge from outside/inside or from network to network • If you’re on a pleasure trip, take a ferry. If you’re on mission, you need a submarine. • Replaces/augements leased lines (i.e., dedicated T1)
  29. 29. Big World VPN
  30. 30. Why do I need a decent router? • What’s better than having a traffic light? An intelligent cop at every corner • 80% of network failures occur in Layers 1-3 • Today’s routers are like mini-computers, running programs, encrypting traffic, etc. • Working with decent switches, networks can gain complexity and maintain their zip • Business needs: secure private connections, FTP, mail servers, wireless
  31. 31. The Big Picture • The basis of your business begins at power • How you connect to that power (your wires) • What interfaces your wires use to get to your desktop (routers and switches) • Using this model start at layer one and work up • Big companies and small alike build mansions on dirt roads • Pick a single vendor and save yourself trouble
  32. 32. THE FOUNDATION 311 7th Avenue North Mpls, MN 612-465-0700 www.fndtn.com

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