Hi, At first, I'd like to say thanks to all those who supplied me with good resources to learn more about computer networking and telecommunications. I thought that sharing the answers might help others who have the same question, so I'm going to give a brief list of resources which one can use to learn more about some of the most important factors in network communications.
 Computer Networks 4th Ed by Andrew S. Tanenbaum , [Chapter 5, Section 5.4 Quality of Service] : I didn't read the whole book and you may find other sections more useful, but this part of the book gave me a view of what should I look for to get more information.Actually it gave me a lot of good keywords to search for.  http://whatis.techtarget.com/ : It's a good IT-specific encyclopedia. "bandwidth" , "latency" , and "data transfer rate" definitions helped me a lot.  http://www.spiritus-temporis.com/throughput/the-difference-between-throughput-and-latency.html: A useful web page.  http://smutz.us/techtips/NetworkLatency.html : I found it wonderful. After reading these texts I got an overall understanding of the logic behind packet transmission over a link.I think that's enought for a beginner but If you could share more and better resources, I would be happy to read them. Thanks, Mobin ---------- Forwarded message ---------- From: Mobin Yazarlou <yazarlo...@gmail.com> Date: Sat, Sep 11, 2010 at 9:54 AM Subject: What is a good resource to study telecommunication basics To: firstname.lastname@example.org Hi, Today I've installed ns-allinone-2.34 package on Linux and tried to start learning NS but after a couple of hours I found that it needs a good understanding of telecommunication basic concepts.Unfortunately my knowledge, as a software engineer, about Networking is limited to application level network programming, application level protocols like HTTP and some other protocols like TCP/IP, UDP so I need a good resource to study the relation between Bandwidth, Link delay, packet size and packet rate which are essential for anyone who wants to simulate a network with NS. Could you share the resources by which you learned these topics with me? Thanks in advance, Mobin