Today's CPUs are formed using a process called ____ that imprints patterns on semiconductor materials.

What DNS resource record type is used to provide the SMTP servers that can accept mail for the domain?

A. A record B. SRV record C. MX record D. AAAA record

____________________ firewalls combine the elements of other types of firewalls-that is, the elements of packet filtering and proxy services, or of packet filtering and circuit gateways.

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