To access the internet using static IPs, the firewall (or router) must be configured correctly:
B: Default gateway: This is essential because it tells the firewall where to send outbound traffic destined for outside the local network.
D: One static IP address: The firewall must be assigned one of the static IPs to communicate over the public internet.
The other options are not essential for basic internet connectivity in this context:
A: NTP server: Useful for time synchronization but not required for internet access.
C: The modem's IP address: Irrelevant unless doing modem-level configuration.
E: DNS servers: Important for name resolution but not for basic layer 3 connectivity.
F: DHCP server: Not used when static IPs are assigned.
# Reference:
CompTIA Network+ N10-009 Official Objectives: 2.2 - Compare and contrast addressing technologies.