Internet and intranet fundamentals
Download
1 / 26

- PowerPoint PPT Presentation


  • 430 Views
  • Updated On :

Internet and Intranet Fundamentals Class 3 Session A Topics TCP/IP Comer Animations and Images Internet Architecture (SessionB) Regulation (Session B) TCP/IP Comer Animations and Images http://www.netbook.cs.purdue.edu/subjindx/indx420.htm ARP and Reverse ARP

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about '' - benjamin


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Topics l.jpg
Topics

  • TCP/IP

    • Comer Animations and Images

  • Internet Architecture (SessionB)

  • Regulation (Session B)


Tcp ip l.jpg
TCP/IP

  • Comer Animations and Images

    • http://www.netbook.cs.purdue.edu/subjindx/indx420.htm

  • ARP and Reverse ARP

    • Address Resolution Protocol

      • IP layer must pass to datalink layer the datalink adress of the destination interface

        • on same network

      • ARP automates address table update

        • uses broadcast

    • RARP

      • knows frame address, must find own IP address


Tcp ip4 l.jpg
TCP / IP

  • ICMP = Internet Control Message Protocol

    • routers generate most ICMP traffic

    • most common types

      • destination unreachable: can’t find routing table entry

      • routing redirect: better route exists

      • time expired: ttl = 0; traceroute uses this

      • echo request / echo reply: ping uses this


Tcp ip routing architecture l.jpg
TCP / IPRouting Architecture

  • Autonomous Systems (AS)

    • collection of routers under single administration

    • use same routing protocol

      • Interior Gateway Protocol (IGP)

      • keeps routers informed of interior routes

    • AS-to-AS connection uses a different protocol

      • Exterior Gateway Protocol

      • policy routing, transit traffic, local traffic (originating within)


Tcp ip routing architecture6 l.jpg
TCP / IPRouting Architecture

  • Routing Protocols

  • Reachability Protocols

    • whether path exists

      • EGPs and BGPs (Border Gateway Protocol)

  • Distance Vector Protocol

    • distance metric to remote network

      • RIP = Routing Information Protocol

        • broadcast exchange of routing information

        • uses UDP

      • OSPF = Open Shortest Path First


Internet architecture l.jpg
Internet Architecture

  • Overview

  • ISPs

    • Internet Service Providers

  • Regional Networks

  • NAPs and MAEs

  • U.S. Commercial Backbone

  • Internet Monitoring


Internet architecture overview l.jpg
Internet ArchitectureOverview

  • A Network of Networks

    • internetworking

  • The Big Picture

    • http://navigators.com/internet_architecture.html


Slide9 l.jpg
ISPs

  • Points of Presence (POPs)

  • Dial-Up and Dedicated Network Connections

    • variety of underlying technologies

    • PPP (Point-to-Point Protocol)

      • modems

    • ISDN (Integrated Services Digital Network)

    • Frame Relay, Dedicated T-1

    • ADSL and Cable Modems


Slide10 l.jpg
ISPs

  • Large and Small

  • Connect to Regional Network

    • may be a regional network

  • Larger Players

    • UUNet, PSINet, and Netcom

    • Telcos: MCI, ATT


Slide11 l.jpg
ISPs

  • Internet Access also provided by

    • OSP (Online Service Providers)

      • AOL, Compuserve, Prodigy

  • For a complete list of ISPs seeThe List: http://thelist.internet.com/

  • IPPs (Internet Presence Providers)

    • same as ISP but no access provided


Isp technology l.jpg
ISP Technology

  • Aggregators

    • also known concentrators

    • handles

      • incoming dial-up calls (say, 100)

      • a few ISDN lines

      • leased-line connections (T-1)

      • frame relay

      • and function as a router to the internal ISP network



Regional networks l.jpg
Regional Networks

  • BARRNet: Northern Central California (CA)

  • CERFnet: Western US and International

  • CICnet: Midwest US (MN, WI, IA, IN, IL, MI, OH)

  • MIDnet: Mid-US (NE, OK, AR, MO, IA, KS, SD)

  • NEARNET: Northeastern US (ME, NH, VT, CT, RI, MA)

  • NYSERNet: Northeastern US (NY...)

  • SURAnet: Southeastern US (WV, VA, SC, NC, TN, KY, LA, MS, AL, GA, FL, Washington, D.C., MD, DE)

  • Westnet: Western US (AZ, CO, ID, NM, UT, WY)


Regional networks cerfnet now at t l.jpg
Regional NetworksCERFnet (now AT&T)


Regional networks cerfnet now at t16 l.jpg
Regional NetworksCERFnet (now AT&T)



Naps and maes l.jpg
NAPs and MAEs

  • NAP = Network Access Point

    • originally NFS

  • MAE = Metropolitan Area Exchange

    • MCI Worldcom has a service mark on this

    • Tier-1

      • MAE-East (D.C.) and MAE-West (San Jose)

    • Tier-2

      • LA, Chicago, Dallas, Houston, New York

    • Giant LAN switch (FDDI)


Mae los angeles l.jpg
MAE-Los Angeles

cat5500/129 198.32.146.20 triton.cerf.net

cat5500/129 198.32.146.14 mae-la.exodus.net

cat5500/129 198.32.146.12 mae-la.px.concentric.net

cat5500/129 198.32.146.16 mae-la-CCIBRT.mediaone.net

cat5500/129 198.32.146.18 f5.peer1.lax1.genuity.net

catalyst1/6 198.32.146.19 mae-la.ware.net

catalyst1/7 198.32.146.25 mae-la.eni.net

catalyst2/4 198.32.146.23 mae-la.intelenet.net

isi-cat5500/130 198.32.146.26 maela-lap.digilink.net

isi-cat5500/136 198.32.146.17 mae-la.lap.interworld.net

isi-cat5500/137 198.32.146.10 lap.ln.net

isi-cat5500/138 198.32.146.21 mae-la.above.net

isi-cat5500/139 198.32.146.24 mae-la.zocalo.net

isi-cat5500/140 198.32.146.15 e0.br1.USC.globalcenter.net

isi-cat5500/194 198.32.146.3 m.ep.net

isi-cat5500/202 198.32.146.27 lap.berkeley.edu

isi-cat5500/203 198.32.146.11 sandbox.ep.net

isi-cat5500/204 198.32.146.111 iosv6-7k.ep.net

(unknown) 198.32.146.13 mae-la.ni.net


U s commercial backbone l.jpg
U.S. Commercial Backbone

  • ANS (formerly the NSF backbone, now owned by MCI WorldComm)

  • AT&T Network Services

  • BBN Planet

  • MCI WorldCom

  • Sprintlink

  • UUNET (now owned by MCI WorldCom)

  • PSI


Regional networks psinet uunet l.jpg
Regional NetworksPSINet & UUNET

  • Performance Systems Intenational

    • based in Herndon, VA

    • http://www.psi.com/network/NorthAmer.html

  • UUNET

    • MCI’s internet subsidiary

    • http://www.uunet.com/network/northam.htm


U s commercial backbone22 l.jpg
U.S. Commercial Backbone

  • Minor ISPs Interconnect to Regional Networks at Tier-2 NAPs and MAEs

    • T-1, T-3

  • Regional Networks Connect to Backboneat NAPs

    • T-3, OC-3, OC-12 and up


Internet monitoring l.jpg
Internet Monitoring

  • http://www.mids.org/

“MIDS examines the composition, content, and users of the Internet and other networks in the Matrix of all computers worldwide that exchange electronic mail. We organize information on many such topics textually, graphically, and geographically, and publish it in many places, including our own.”


Internet monitoring network wizards http www isc org ds hosts html l.jpg
Internet MonitoringNetwork Wizards http://www.isc.org/ds/hosts.html


ad