Which of the following commands can Lisa, a network technician, use to check whether the DNS server for a given domain is reachable?

?The pages on a university's website are maintained by individual departments and organizational units. It is a useful policy to require that every change a user makes to his department pages be reviewed and approved.  

Answer the following statement true (T) or false (F)

Variable ______ contains extra information that is appended to a URL in a get re- quest, following a question mark.

Fill in the blank(s) with the appropriate word(s).