单项选择题
A. Binary
B. Decimal
C. Hexadecimal
D. Octal
E. All of the above
单项选择题 Which protocol automates all of the following functions for hosts on a network: IP configuration, IP addresses, subnet masks, default gateways, and DNS server information?（）
单项选择题 Which protocol below uses TCP port 443?（）
多项选择题 Regarding DHCP (dynamic host configuration protocol), which two of the following choices below are true?（）