Answer / manoj & chandan

we assign the wild card mask for deefine particular host or
identify the particular host in accesslist.

Answer / jitendra

ok take this example to under stand it.


router(config)#router ospf 100
#network 192.168.100.0 0.0.0.255 area 1
what is the meaning of that command?.the menaing of that
comand is match three octet excatly but last octet may be
any thing
so by this command we are puting whole host of the
192.168.100.X series ip inthe same area

now came to access lisst
in the assess list we use the wild mask to give acess/deny
to the spefic user undestand?NO ok?
let meexpalin
supose wehave 255 user in my company and i want to give
only 150 user to acess the web servise and rest of all are
not allowed to access the web srvise
so what should i have to do?
correct Assess-list is the correct answer.
so now by implemneting the wild mask iknassess list we can
get our goal
now your task is that implemnet the access-list for my
question it is usfull for you

Thank you
Jitendra kumar sinha

Answer / girirajan

To Understand more clear wildcard mask is unsed to select
range of ip address . In the above example the wildcard is
used to advertise ospf network of range from 192.168.101.1
to 192.168.254.255

The same thing if you want to assign acl for a range of
network and IP's wild card can be used.

Answer / arun

i agree with jitendra plz give ur precise idea but y cant v
use subnet it too will define same specific area(network) n
it too specifies to same address
my simple consideration is subnet use (and logic) and wild
card uses (nand logic) if wrong plz corct me

Answer / nandlal chauhan

I think with the help of the wild card marks we can get
shortly how many host get from the particular network id or
network address.

eg. 192.168.10.0 the default subnet is 255.255.255.0
so 255.255.255.255-255.255.255.0
so wild card marks is 0.0.0.255

Answer / mohammad ezzi

By using Wildcard mask in ospf we can gain control over the routing update propagation. by this we can define which network should get routing update and which network should not get routing update.
same as we use in access lists.

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