I found this mask in 4 case:
1.In route table,for windows,"route print" will have items like this:
destination mask gateway interface
192.168.0.1 255.255.255.255 127.0.0.1 127.0.0.1
2.when dialup pppoe,get an address with netmask 255.255.255.255
3.loopback interface of router can assign
an address with netmask 255.255.255.255
4.when setup ip alias,if the alias is in the same subnet,netmask must be 255.255.255.255
why does it need to be like this?
one more question,if there is a mathine have two ether interface,just as e1 and e2,set e1 as :
then set e2 as :
when some other computers connect through
e2,which netmask should be set?
thx very much