<font color="#3333ff"><font face="verdana,sans-serif">Sorry Bryan. I cannot accept your answer.<br clear="all"></font></font><div><span style="color:rgb(51, 51, 255);font-family:verdana,sans-serif"><br></span></div><div><span style="color:rgb(51, 51, 255);font-family:verdana,sans-serif"><span class="Apple-style-span" style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255); "><div class="im" style="color: rgb(80, 0, 80); ">
GGR> So, irrespective of the application, everything communicating<br>GGR> over the network has a port address.<br><br></div>BJS> This is _false_. Not trying to be anal here, but understand my initial response was hoping to avoid the mega-oversimplification that I'm BJS> seeing too often. I was afraid it would go here.</span></span></div>
<div><span style="color:rgb(51, 51, 255);font-family:verdana,sans-serif"><br></span></div><div><span style="color:rgb(51, 51, 255);font-family:verdana,sans-serif">Yes, every application that talks over the network or within the OS itself has a port, it may be a temporary port, but it is present. In fact when 1 app talks to another app within the same server/pc, a port is opened for communication. It may not be seen on the network, but it is still present.</span></div>
<div><span style="color:rgb(51, 51, 255);font-family:verdana,sans-serif"><br></span></div><div><span style="color:rgb(51, 51, 255);font-family:verdana,sans-serif">About using tcpdump/snoop(solaris) over netstat. True netstat gives network information, it is a good step to get on to learn about network traffic. But for running it on a PC, it does not matter (since we are all behind a router at home).</span></div>
<div><span style="color:rgb(51, 51, 255);font-family:verdana,sans-serif"><br></span></div><div><font class="Apple-style-span" color="#3333ff" face="verdana, sans-serif">Also, to learn something, we need to simply stuff first, else we will drive away folks who want to learn. If we make things sound like brain surgery, then no one will want to learn about subjects.</font></div>
<div><font class="Apple-style-span" color="#3333ff" face="verdana, sans-serif"><br></font></div><div><span style="color:rgb(51, 51, 255);font-family:verdana,sans-serif"><br>--</span><br style="color:rgb(51, 51, 255);font-family:verdana,sans-serif">
<span style="color:rgb(51, 51, 255);font-family:verdana,sans-serif">Rajiv G Gunja</span><br style="color:rgb(51, 51, 255);font-family:verdana,sans-serif"><span style="color:rgb(51, 51, 255);font-family:verdana,sans-serif">Blog: <a href="http://ossrocks.blogspot.com" target="_blank">http://ossrocks.blogspot.com</a></span><br>
<br><br><div class="gmail_quote">On Thu, Sep 15, 2011 at 16:22, Bryan J Smith <span dir="ltr"><<a href="mailto:b.j.smith@ieee.org">b.j.smith@ieee.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">> So, irrespective of the application, everything communicating<br>
> over the network has a port address.<br>
<br>
</div>This is _false_. Not trying to be anal here, but understand my initial response was hoping to avoid the mega-oversimplification that I'm seeing too often. I was afraid it would go here.</blockquote></div><br>
</div>