Presentation is loading. Please wait.

Presentation is loading. Please wait.

Wisconsin Broadcaster’s Association - Transferring Files Using the Internet July 14, 1999.

Similar presentations


Presentation on theme: "Wisconsin Broadcaster’s Association - Transferring Files Using the Internet July 14, 1999."— Presentation transcript:

1 Wisconsin Broadcaster’s Association - Transferring Files Using the Internet July 14, 1999

2 Agenda How does the Internet connect computers? What file transfer options are available? How long should file transfers take?

3 The Internet

4 Trace Route - West Coast glacier> traceroute traceroute to cio-sys.cisco.com ( ), 30 hops max, 40 byte packets 1 hood.binc.net ( ) ms ms ms 2 borderx1-hssi4-0.KansasCity.cw.net ( ) ms ms 29.2 ms 3 core2-fddi-0.KansasCity.cw.net ( ) ms ms ms 4 core5.WillowSprings.cw.net ( ) ms ms ms ( ) ms ms ms 6 p2-0.chicago1-nbr1.bbnplanet.net ( ) ms ms ms 7 p2-1.paloalto-nbr1.bbnplanet.net ( ) ms ms ms 8 p1-0.paloalto-nbr2.bbnplanet.net ( ) ms ms ms 9 p0-0-0.paloalto-cr18.bbnplanet.net ( ) ms ms ms 10 h1-0.cisco.bbnplanet.net ( ) ms ms ms 11 sty.cisco.com ( ) ms ms ms

5 Trace Route - Local glacier> traceroute traceroute to ( ), 30 hops max, 40 byte packets 1 hood.binc.net ( ) ms ms ms 2 borderx1-hssi4-0.KansasCity.cw.net ( ) ms ms ms 3 core2-fddi-0.KansasCity.cw.net ( ) ms ms ms 4 core9.Chicago.cw.net ( ) ms ms ms ( ) ms ms 50.9 ms 6 ord1-core3-fa4-1-0.atlas.digex.net ( ) ms ms ms 7 dca1-core6-s1-1-0.atlas.digex.net ( ) ms ms ms 8 dca1-core10-pos1-3.atlas.digex.net ( ) ms ms ms 9 ric2-core1-s4-0-0.atlas.digex.net ( ) ms ms ms 10 rdu2-core2-h1-0-0.atlas.digex.net ( ) ms ms ms 11 rdu2-core1-fa atlas.digex.net ( ) ms ms ms 12 * ( ) ms ms 13 ( ) ms ms ms

6 Network Performance 180,000 miles/s - It’s not just a good idea, it’s the law 20 ms for a R/T from Madison to California That doesn’t include other overhead

7 Internet Connection Physical proximity is not as important as “Internet” proximity Each router or “hop” adds latency Lot’s of places for things to go wrong - most out of your control The bandwidth is shared

8 File Transfer Options Attachments FTP - File Transfer Protocol TFTP - Trivial File Transfer NFS - Network File System

9 Transfer

10 Disks on mail servers can fill Mail servers can go down Connections can be slow/down Mail is readily intercepted Mail stops in many places Simple and readily available

11 FTP Transfer

12 Disks can fill Usually requires a dedicated FTP server Less places for things to go wrong More “production” orientated

13 TFTP Transfer Trivial File Transfer Protocol Like FTP except lacking some features Usually used for engineering purposes Client and Server commonly available

14 NFS Transfer Network File System Generally a Data Center application Relatively slow Requires specialized knowledge

15 How Long - Ideal Conditions Assume 1 MB file (About a floppy) 28.8 kbs Modem4.62 minutes 56 kbs Mode2.38 minutes 126 kbs ISDN1.05 minutes 800 kbs xDSL10.2 seconds T seconds DS30.17 seconds

16 Reality Speed of disk access Speed of network access Congestion of network - dropped packets Number of hops Distance traveled

17 Summary Today, nothing is guaranteed High-speed access is key Availability is important


Download ppt "Wisconsin Broadcaster’s Association - Transferring Files Using the Internet July 14, 1999."

Similar presentations


Ads by Google