220.220.220.0 is an invalid subnet mask.
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Without a subnet mask a client is not able to participate on a network because the network software is unable to determine the network addresses.
6-inch calipers
6-inch calipers
RIPv1 is classful and will use the proper network mask based on the leading octet. For example 192.168.20.0 would have a mask of 255.255.255.0 because it is a class C
subnet mask
JSGPM sizing tool....or a six inch caliper!
you can't. There's no way to know from an IP address wha the subnet mask is. However, there are some likely guesses. Since 195.0.8.0 ends with a zero, the subnet is probably a 24-bit mask: 255.255.255.0 But it doesnt have to be. The network administrator knows for sure. fm
To determine the network or subnet address of an IP address
binary ANDing
binary ANDing
A router running a classless routing protocol (Such as OSPF) will send the subnet mask in its route updates to its neighboring routers.