A technician, Joe, has been tasked with assigning two IP addresses to WAN interfaces on
connected routers. In order to conserve address space, which of the following subnet masks
should Joe use for this subnet?
A.
/24
B.
/32
C.
/28
D.
/29
E.
/30
Explanation:
/30
IPv4 has 32bits. 30bits are used for network and 2bits are left for hosts.
2 power of 2 equals 4
4 minus 2 [network id and broadcast] equals 2 [two IP addresses to WAN interfaces on
connected routers]
0
0