In the following exhibit, which router is the designated router?

A. Router C
B. Router B
C. Router D
D. Router E

B. Designated routers are only elected on broadcast (multi-access) networks such as a LAN. The router with the highest IP address will become the designated router. Since Router B has an IP address of 192.168.10.2/30, 192.168.10.5/30, and 192.168.2.1/24, it will become the DR.