Hello Pradeep,
Thanks for reaching out on the forum! The first thing to try is to see if you can resolve this hostname from your PC. You can run the command nslookup fin-pub-a-50.berlin.icm and see if it resolves. If this doesn't you'll need to add this to your host file, or manually set your DNS server to point to 10.10.20.3, the DNS server for this lab.
Please let me know if this makes sense, and if you have any questions!
Thanks!
Jacob