Refer to the exhibit. A network administrator wants to reduce the number of OSPF routes advertised from Area 1 into Area 2.
As the router configuration specialist, what two things would you do to accomplish this goal? (Choose two.)
Select 2 response(s).
A.
Enter the configuration on router B1.
B.
Enter the configuration on router B4.
C.
On the same router, enter the Summary-address 10.10.1.0 255.255.255.128 subcommand.
D.
On the same router, enter the Area 1 range 10.10.1.0 255.255.255.128 subcommand.
E.
On the same router, enter the Area 2 range 10.10.1.0 255.255.255.128 subcommand.
Can anyone explain how to calculate the summarized address range 10.10.1.0 255.255.255.128?
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/28 means 256-16=240 mask or network 16 (128 64 32 16 8 4 2 1 )
There are 10.10.1.16 —- 10.10.1.96 prefix. 96-16=80 Number 80 is between 128 and 64 so we declare mask 128 and network 64 or /25.
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