Refer to the exhibit:
The networks connected to router R2 have been summarized as a 192.168.176.0/21 route and sent to R1. Which two packet destination addresses will R1 forward to R2? (Choose two.)
A.
192.168.194.160
B.
192.168.183.41
C.
192.168.159.2
D.
192.168.183.255
E.
192.168.179.4
F.
192.168.184.45
From the subnet mask of /21, we can specify the network address and broadcast address of this subnetwork:
Increment: 8 of the third octet(/21 = 255.255.248.0 or 1111 1111.1111 1111. 1111 1000.0000 0000)
Network address: 192.168.176.0
Broadcast address: 192.168.183.255 (183 = 176 + 8 – 1)
Therefore all the destination addresses in this range will be forwarded to R2 -> B and E lie in this range and their packages will be forwarded to R2. Please notice that D is an incorrect answer because it is a broadcast address and R1 will drop its packages.