We decide to create a location tracking service so that we, Ask an Expert

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We decide to create a "location tracking" service so that we can track our friends' GPS locations with a time granularity of 5 minutes. Each person who subscribes to the service is given a domain name, l..X@ee.ust.hk , and there is a LT (location tracking) server for each domain. We assume whoever subscribes to the service have a GPS-capable smart phone.

(a) What needs to be done on the client side (i.e. John's smart phone)?
(b) What needs to be done to DNS server so that we can complete the service?
(c) Our friend John Lee got his service from google and receives the address:
Gps: j..e@google.com.
Assume we use a browser to find the GPS location of John. How does the browser to find his GPS server's IP address?

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