If you wanted to have 12 subnets with a Class C network ID, which subnet mask would you use?(a) 255.255.255.252(b) 255.255.255.255(c) 255.255.255.240(d) 255.255.255.248I have been asked this question in an interview for internship.This interesting question is from Analyzing Subnet Masks topic in portion TCP/IP Protocol Suite of Computer Network

If you wanted to have 12 subnets with a Class C network ID, which subn

1.	If you wanted to have 12 subnets with a Class C network ID, which subnet mask would you use?(a) 255.255.255.252(b) 255.255.255.255(c) 255.255.255.240(d) 255.255.255.248I have been asked this question in an interview for internship.This interesting question is from Analyzing Subnet Masks topic in portion TCP/IP Protocol Suite of Computer Network
Answer» The CORRECT CHOICE is (c) 255.255.255.240 To explain I would say: If you have eight networks and each requires 10 HOSTS, you would use the Class C mask of 255.255.255.240. Why? Because 240 in binary is 11110000, which means you have four subnet BITS and four HOST bits. Using our math, we’d get the following: 24-2=14 subnets 24-2=14 hosts.

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