Question

Which of the following are valid host addresses for subnet 192.168.1.0 with a subnet mask of /24 (255.255.255.0)?

a) 192.168.1.1
b) 192.168.1.128
c) 192.168.2.0
d) 192.168.0.255

Answer 1

The valid host addresses for the subnet 192.168.1.0/24 are 192.168.1.1 and 192.168.1.128. Addresses 192.168.2.0 and 192.168.0.255 are not valid for this subnet.

Step-by-step explanation:

The student is asking which IP addresses are valid host addresses within the subnet 192.168.1.0 with a subnet mask of /24 (255.255.255.0). For a subnet with this mask, all addresses from 192.168.1.1 to 192.168.1.254 are valid host addresses. This is because the /24 mask specifies that only the last octet (the last 8 bits of the address) can be used for host addresses, while the first three octets (the first 24 bits) identify the network.

• 192.168.1.1 is a valid host address within the subnet.
• 192.168.1.128 is also a valid host address within the subnet.
• 192.168.2.0 is not a valid host address for this subnet as it belongs to a different subnet altogether.
• 192.168.0.255 is not a valid host address for this subnet as it is part of the previous subnet and typically reserved as a broadcast address.