1 / 16

實驗五 網路探測實驗

實驗五 網路探測實驗. 教師： 助教： 1998/10/19 High Speed Network Lab. Department of Computer Information Science, NCTU. Outline. Requirement Routing Path Measurement Loose SouRce Route Experiment Steps LAN monitoring Network Traffic Statistical Data. Surveying Tools (I). Surveying Tools (II).

lexine
Download Presentation

實驗五 網路探測實驗

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 實驗五網路探測實驗 教師： 助教： 1998/10/19 High Speed Network Lab. Department of Computer Information Science, NCTU

  2. Outline • Requirement • Routing Path Measurement • Loose SouRce Route • Experiment Steps • LAN monitoring • Network Traffic Statistical Data

  3. Surveying Tools (I)

  4. Surveying Tools (II)

  5. Surveying Tools (III)

  6. Requirement • Route path measurement Suggested software tool: • LAN monitoring Suggested software tool: • Experiment specification http://atm5.cis.nctu.edu.tw/~ydlin/course/cn/exp/netprob/index.htm

  7. Routing Path Measurement • DNS address translation host name/URL ==> IP address • TTL mechanism IP packet TTL (Time To Live)

  8. (Remote) B (Local) A TTL Mechanism Router TTL=0 TTL=1 TTL=2 ICMP ICMP

  9. (Remote) B (Local) A Loose SouRce Route (I)Remote Trace Route Router LSRR LSRR LSRR LSRR C

  10. (Remote) C (Local) A,B Loose SouRce Route (II)Round Trip Trace Route Router LSRR LSRR LSRR LSRR LSRR LSRR LSRR

  11. (Replacing Dst) (Original Dst) B’ B (Local) A Loose SouRce Route (III)LSRR Supporting Problem Non-LSRR supporting routers LSRR supporting routers Suggestion: Find a LSRR supporting node nearest from original node

  12. 1. Dst host name 2. LSRR 3. DNS result Analysis Table Map 4. Visited cache Experiment Steps

  13. LAN Monitoring Starting time Ending time Num of packet Num of byte Num of collision Max byte/sec Average byte/sec

  14. ‘每天’流量圖 (5 分鐘平均值) 最大交大==>高速電腦 28.7 Mb/s (4.6%) 平均交大==>高速電腦 17.8 Mb/s (2.9%) 現在交大==>高速電腦 15.8 Mb/s (2.5%) 最大高速電腦==>交大 26.9 Mb/s (4.3%) 平均高速電腦==>交大 15.1 Mb/s (2.4%) 現在高速電腦==>交大 10.3 Mb/s (1.6%) Network Traffic Statistical Data Find traffic data in TWNIC web site • New Version : http://www.twnic.net/ • Old Version : http://www.twnic.net/ver2.html

  15. Experiment Records Routing Path Exp. record format LAN monitoring record format Traffic statistical data record format (not necessary)

  16. Bonus • Trace measurement source code • Trace the network in NCTU. • Reference: • http://www.csie.nctu.edu.tw/~jhliang/netadm1.htm

More Related