1 answer
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The subnet mask for a /22 CIDR notation is **255.255.252.0**.
In binary, a /22 subnet mask would look like this:
```
11111111.11111111.11111100.00000000
```
Which translates to decimal as:
```
255 255 252 0
```
So the correct answer from your choices is **255.255.252.0**.