Solved 1. Question (a) Subnet Mask is 255.255.248.0 /21 IP | Chegg.com
How to calculate a subnet mask from hosts and subnets | TechTarget
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Default Subnet Mask and IP Address Class 177.100.18.4 119.18 ...
The Sky Networks - CIDR CIDR (Classless Inter-Domain Routing) notation rather than the common subnet mask 255.x.x.x when configuring addresses and networks. Refer to the CIDR Subnet Table to find the CIDR