dotted decimal notation
"Subnet mask" is is a computer term related to IP networks. Since you haven't given your example, the question cannot be answered. Further information can be found by searching for 'subnet mask' in Wikipedia.
Subnet mask
255.255.248.0
True
/28
Given a Class C network: 200.1.1.0 We want 5 subnets, each with 30 hosts on it. How many bits to borrow ? How many bits to leave? What is the subnet mask? ( in dot notation and in CIDR notation)
Example IP address of 192.168.1.123 with a subnet mask of 255.255.255.0
The term "slash notation" refers to the way a processor reads an IP address. The "Watchguard" website gives a table showing the most common network masks and their equivalent in slash notation.
This isn't a valid CIDR address, so I assume it is: 192.168.1.162/7 That would yield a subnet mask of 255.255.255.254
That's not a valid subnet mask. Probably the subnet mask is supposed to be 255.255.192.0. You can convert each of the parts separated by dots to binary separately. Just use a scientific calculator, for example, the one that comes with Windows. To be a valid subnet mask, the binary equivalent must have a certain number of only ones, followed by only zeros.
It does not require a subnet mask.