Footnotes in a Word document can only be labeled with numbers

If no DHCP server is present in some broadcast domain, which of the following special pieces of software must be present in that broadcast domain?

A. broadcast bit B. address pool C. DHCP relay agent D. address scope

In PHP, the escape character is the ____.

A. pipe (|) B. period (.) C. semicolon(;) D. backslash(\)