Question

Which three IP addresses are private? (Choose three.)

a) 192.168.1.1
b) 172.31.45.10
c) 10.255.255.255
d) 172.16.0.1
e) 169.254.0.1
f) 192.0.2.1

Answer 1

The private IP addresses are 192.168.1.1, 172.31.45.10, and 10.255.255.255, as they fall within the ranges specified by IANA for private use within internal networks.

The three private IP addresses are: a) 192.168.1.1, b) 172.31.45.10, and c) 10.255.255.255.

Private IP addresses are reserved for use within private networks and are not routable on the internet. The Internet Assigned Numbers Authority (IANA) has designated specific ranges of IP addresses for private use. The ranges include 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255. Address a) 192.168.1.1 falls within the 192.168.x.x range, address b) 172.31.45.10 is within the 172.16.0.0 to 172.31.255.255 range, and address c) 10.255.255.255 is within the 10.x.x.x range, making them all private IP addresses.

These IP addresses are designed for internal network use and offer a way to enable device communication within a network without using public IP space, thus preserving public IPs for external traffic.