IndiaBIX

Computer Science - Networking - Discussion

Discussion Forum : Networking - Section 2 (Q.No. 33)
Networking
33.
You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 25 hosts and a maximum number of subnets?
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
14 comments Page 1 of 2.
Praveen said:   1 decade ago
How it is possible? What is the logic behind this? Can anyone explain this? This kind of questions are frequently asking in gate.
Prabhash Singh said:   1 decade ago
For 25 hosts you need minimum 5 bit i.e 2^5 = 32.

Therefore, the 5 bit of the last octet in ip address would be reserved for host and the remaining would act as subnet.

So, in bit wise it would be 11111111.11111111.11111111.111*****
Which is 255.255.255.224
Piyush said:   1 decade ago
How is that three 1's coming in the end?
Manik said:   9 years ago
Same doubt as Piyush, please explain us @Prabhash Singh.
Abhishek said:   9 years ago
Nice explanation, Thank you all.
Sibasish said:   9 years ago
We required 25 subnets.

2^4<100<2^5 OR 16<100<32.
no of subnets are 2^5 = 32 (no of 1's are 5).
Since default subnet mask of class c is 255.255.255.0.

i.e. 11111111.11111111.11111111.00000000 so 5 more 1 will get add so it will be;

11111111.11111111.11111111.11111000 i.e. 255.255.255.248.
Jyothi said:   9 years ago
Yes, Option D is correct.
Jumth said:   8 years ago
The correct answer is option D.
Kailas Naik said:   8 years ago
Right answer is D.
Geetha said:   7 years ago
Yes, D is the correct answer.
Post your comments here:

Your comments will be displayed after verification.

Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers