Database-Management-System
October 16, 2023Database-Management-System
October 16, 2023Subnetting
| Question 9 |
You have a network ID of 192.168.10.0 and require at least 25 host IDs for each subnet, with the largest amount of subnets available. Which subnet mask should you assign?
| 255.255.255.192 | |
| 255.255.255.224 | |
| 255.255.255.240 | |
| 255.255.255.248 |
Question 9 Explanation:
Given ID belongs to Class C, so default mask for class C is 255.255.255.0, from the last octet 256 hosts are possible, from the 256 we need to fix the bits to create a number of subnets and hosts . But in question we have given that 26 hosts require each subnet, so for 26 hosts we require 5-bits bcz with 4- bit we can make maximum 16 hosts. So, in the last octet first 3 bits are fixed and others are for hosts. Subnet Mask for 3bits in decimal is 128+64+32=224. So, overall subnet mask is 255.255.255.224
Correct Answer: B
Question 9 Explanation:
Given ID belongs to Class C, so default mask for class C is 255.255.255.0, from the last octet 256 hosts are possible, from the 256 we need to fix the bits to create a number of subnets and hosts . But in question we have given that 26 hosts require each subnet, so for 26 hosts we require 5-bits bcz with 4- bit we can make maximum 16 hosts. So, in the last octet first 3 bits are fixed and others are for hosts. Subnet Mask for 3bits in decimal is 128+64+32=224. So, overall subnet mask is 255.255.255.224
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