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we start sending packet to the destination ,TTL starting with 1 ,so at first router TTL will be zero and packet will be dropped .But the router will send you an ICMP packet back which will tell you about the first router on the way.Like wise we will do this upto destination network.One more thing we will use a unused port no. ,which will be discarded at the destination and an ICMP packet willl be sent back.By doing this we can trace the route.

but there is no gurantee that it will fine exact route every time,because there are many paths to reach a destination on the internet.However probability of this is very low.

As explained in the top TTL value is increased from 1, every ICMP packet is returned with error "time exceeded". Actual packet is UDP with destination port higher than 30,000 which creates an error packet as "destination port unreachable" , so Traceroute program responsibility to identify difference between time exceeded error and unreachable.

Hello Buddie,


Your writing shines! There is no room for gibberish here clearly you have explained about
Amazon Interview Question for Technical Support Engineers . Keep writing!
The last few day I am trying to set up SES and Workmail. SES email sending works, but I can not receive any emails. I have been lifted out the sandbox so the SES sending limit is good. Also, all my domains are verified. I tried to google around and did not found any solution. When I send an email from my google account to my amazon account (domain with route53) the email bounce and I receive this:






Thanks a lot. This was a perfect step-by-step guide. Don’t think it could have been done better.


Thank you,
Irene Hynes