Studying for the CCNA exam, I came across the following sample question:
Which of the following is an example of a valid unicast host IP address? A. 172.31.128.255./18 B. 255.255.255.255 C. 192.168.24.59/30 D. FFFF.FFFF.FFFF E. 22.214.171.124 F. All of the above
It looks like "none of the above" to me, but the stated answer was "A". Isn't 172.31.128.255/18 a broadcast address?