I Was looking in the previous year exam papers for a subject called "Networks", i have exam next month , anyway i found this question that made me confused :
Given the network address 117.223.0.0 and the number of subnets Required is : 16
a. What would be the suitable Subnet Mask ?
b. What is the 1st Subnet Address ?
c. What is the 3rd Subnet Address ?
d. What is the Subnet broadcast address for the before last Subnet ?
this is a Class A ip , and the number in the second octet is 223, they didn't mention if they used the default subnet mask , so if i want to subnet such ip would i start from 117.0.0.0 and forget about the second octet"223" ?! or what ? in other way , should i consider the subnet mask 255.0.0.0 which is the default for Class A , and take 4 bits for the networking subnetting requirements and start from 117.0.0.0 up to 16 network from that address or the second octet should be taken in consideration ?
My answers for the above question are :
a. 255.240.0.0
b. 117.0.0.0
c. 117.32.0.0
d. 117.239.255.255
e. From 117.240.0.1 To 117.255.255.254
Please Help me to understand how to solve such question in case i get any in my exam .
Kind regards