Virtual Gate Test Series: Computer Networks - Subnet Mask

Question

For class $B$ network, all even bit positions are selected for subnet mask bits. What is the possible subnet mask?

$(A) 255.25.170.170$

$(B) 255.255.85.85$

$(C) 255.255.255.240$

$(D)$ None

In this question, my doubt is how we can assign subnet mask like this can we? Subnet bits should be taken in continuation from host bits right?

Answer 1

is answer a?

practically we take subnet bit in continuation but theoritically i have seen lots of question where subnet bits are not continous.

Comments

its b sir

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why not b

Answer 2

The correct answer is option B