Title: Delay !!!

Can somebody explain me what is delay ??  I mean the round-trip time of the packet, Is it different from media to media or it is not media-specific, secondly can I know out the links VSAT/DDN  which is having a more delay over the other.

 We have a VSAT link 64 kbps to one of our site and a 64kbps DDN to another site the response of the DDN is much better than the VSAT.

Normal pinging to the site connected through DDN is 40-50 miliseconds with one hop.
Normal pinging to the site connected through VSAT is 500-600 milliseconds with one hop.

Path Delay value=Link delay + Repeater Delay + DTE Delay + 5, If PDV<512 the communication path is ok.
Link Delay=2 X Segment Length X Cable Delay  in BT/m

Is the same formula applicable for WAN links, VSAT etc or it is just for ethernet networks.

Pls. explain.

Thanks in advance.

Shaikh Raees Ahmed,
Cisco Certified Network Associate,
Microsoft Certified Systems Engineer,
Systems & Network,
IT Division.

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