You work as a Web Developer for XYZ CORP.

Website monitoring service can check HTTP pages, HTTPS, FTP, SMTP, POP3, IMAP, DNS, SSH, Telnet, SSL, TCP, PING, Domain Name Expiry, SSL Certificate Expiry, and a range of other ports with great variety of check intervals from every four hours to every one minute. Typically, most website monitoring services test a server anywhere between once-per hour to once-per-minute. Advanced services offer in-browser web transaction monitoring based on browser add-ons such as Selenium or iMacros. These services test a website by remotely controlling a large number of web browsers. Hence, it can also detect website issues such a JavaScript bugs that are browser specific. Answer: A is incorrect. This task is performed under network monitoring. Network tomography deals with monitoring the health of various links in a network using end-to-end probes sent by agents located at vantage points in the network/Internet.