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Copyright(c)2007 Nikkei Business Publications, Inc. All Rights Reserved. All editorial content and graphics on this Web site may not be reproduced in whole or in part without the express permission of the copyright owner. |
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Nikkei Network |
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April 2007
Beginners’ Question When will search engines find my site? FEATURE 2 Understanding Thoroughly the Workings of Communications A Course on Using Packet Capture It’s difficult to get a solid sense of what networks are like since you can’t see inside, even if you work hard at it. So let’s learn the mechanisms of networks following the actual process of the packet capture software. Orientation: Packet exchange is plain as daylight, and seeing what actually happens is the best way to learn Period 1: If you look at packets in order, you can get an overall picture Period 2: What’s the identity of the first packet? Looking at it carefully, you can understand it properly Period 3: The server’s IP address is written in the DNS packet Period 4: Once communications with the server are finally opened up, how is the data’s routing determined? Period 5: Decoding an HTTP message when data comes in from the server FEATURE 3 Learning Network Infrastructure in Charts SIP (Session Initiation Protocol) Vital for IP phones and TV Conferencing Building a Path for Required Call Data |
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