An engineer must configure a /30 subnet between two routes. Which usable IP address and subnet mask combination meets this criteria?
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A. B. C. D.D
A /30 subnet provides four IP addresses, with two being reserved for the network address and the broadcast address, leaving two usable IP addresses for hosts.
Option A:
interface e0/0 description to XX-AXXX:XXXXX ip address 10.2.1.3 255.255.255.252
This option uses the IP address range from 10.2.1.1 to 10.2.1.3, with a subnet mask of 255.255.255.252. This subnet provides four IP addresses: 10.2.1.0 (network address), 10.2.1.1 (usable host address), 10.2.1.2 (usable host address), and 10.2.1.3 (broadcast address). The usable IP addresses for hosts are 10.2.1.1 and 10.2.1.2.
Option B:
interface e0/0 description to XX-AXXX:XXXXX ip address 192.168.1.1 255.255.255.248
This option uses the IP address range from 192.168.1.0 to 192.168.1.7, with a subnet mask of 255.255.255.248. This subnet provides eight IP addresses: 192.168.1.0 (network address), 192.168.1.1 (usable host address), 192.168.1.2 (usable host address), 192.168.1.3 (usable host address), 192.168.1.4 (usable host address), 192.168.1.5 (usable host address), 192.168.1.6 (usable host address), and 192.168.1.7 (broadcast address). The usable IP addresses for hosts are 192.168.1.1, 192.168.1.2, 192.168.1.3, 192.168.1.4, 192.168.1.5, and 192.168.1.6.
Option C:
interface e0/0 description to XX-AXXX:XXXXX ip address 172.16.1.4 255.255.255.248
This option uses the IP address range from 172.16.1.0 to 172.16.1.7, with a subnet mask of 255.255.255.248. This subnet provides eight IP addresses: 172.16.1.0 (network address), 172.16.1.1 (usable host address), 172.16.1.2 (usable host address), 172.16.1.3 (usable host address), 172.16.1.4 (usable host address), 172.16.1.5 (usable host address), 172.16.1.6 (usable host address), and 172.16.1.7 (broadcast address). The usable IP addresses for hosts are 172.16.1.1, 172.16.1.2, 172.16.1.3, 172.16.1.4, 172.16.1.5, and 172.16.1.6.
Option D:
interface e0/0 description to XX-AXXX:XXXXX ip address 209.165.201.2 225.255.255.252
This option uses the IP address range from 209.165.201.0 to 209.165.201.3, with a subnet mask of 225.255.255.