Repos-que-me-gustan/devops-exercises
1
0
Fork 0
Code Pull Requests Activity

ANSWERED: Explain subnet mask and given an example

Browse Source
This commit is contained in:
Austin Songer 2020-01-26 01:09:37 +00:00
parent 68471d5c5a
commit 68d6ddfd39
1 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
README.md
View File

@ -847,6 +847,29 @@ An Internet Protocol address (IP address) is a numerical label assigned to each
<details>
<summary>Explain subnet mask and given an example</summary><br><b>
A Subnet mask is a 32-bit number that masks an IP address, and divides the IP address into network address and host address. Subnet Mask is made by setting network bits to all "1"s and setting host bits to all "0"s. Within a given network, two host addresses are reserved for special purpose, and cannot be assigned to hosts. The "0" address is assigned a network address and "255" is assigned to a broadcast address, and they cannot be assigned to hosts.
**For Example**
| Address Class | No of Network Bits | No of Host Bits | Subnet mask | CIDR notation |
| ------------- | ------------------ | --------------- | --------------- | ------------- |
| A | 8 | 24 | 255.0.0.0 | /8 |
| A | 9 | 23 | 255.128.0.0 | /9 |
| A | 12 | 20 | 255.240.0.0 | /12 |
| A | 14 | 18 | 255.252.0.0 | /14 |
| B | 16 | 16 | 255.255.0.0 | /16 |
| B | 17 | 15 | 255.255.128.0 | /17 |
| B | 20 | 12 | 255.255.240.0 | /20 |
| B | 22 | 10 | 255.255.252.0 | /22 |
| C | 24 | 8 | 255.255.255.0 | /24 |
| C | 25 | 7 | 255.255.255.128 | /25 |
| C | 28 | 4 | 255.255.255.240 | /28 |
| C | 30 | 2 | 255.255.255.252 | /30 |
###
</b></details>
<details>