The broadcast address from the IP address 67.68.67.68/12 is 67.79.255.255.

(A) TRUE
(B) FALSE

TRUE is the correct answer. First, you have to find the subnet mask for the prefix /12. The prefix length means that the subnet mask in binary is: 11111111.11110000.00000000.00000000
Now, convert the subnet mask from binary to decimal. The subnet mask in decimal is 255.240.0.0, so the network ID multiplier is 256 – 240 = 16
Possible subnet IDs are:
67.0.0.0
67.16.0.0
67.32.0.0
67.48.0.0
67.64.0.0
67.80.0.0
etc etc
The network 67.64.0.0 has the IP address of 67.68.67.68
The IP address range of the network is 67.64.0.0 – 67.79.255.255 (the next address 67.80.0.0 is the next subnet ID)
The broadcast address is the last address of the network so, the broadcast address is 67.79.255.255