Hardware Reference
In-Depth Information
18.
B. An IPv4 address is four numbers between 0 and 255 separated by periods.
19.
C. A Domain Name System (DNS) server translates between numeric addresses and
domain names.
20.
B. SMTP is a mail-sending protocol. POP3 is its counterpart, but for receiving mail, not
sending it. FTP is a fi le transfer protocol. HTTPS is a secure version of HTTP, used for
displaying secure web pages.
