145, No. 21 Senate Proceedings, Day Sixteen, February 6, 1999, Senate, sitting as a Court of Impeachment, continued consideration of the articles of impeachment against William Jefferson Clinton, President of the United States, receiving the presentation of evidence from the House managers and White House counsel.
However, a possible answer is 2 or more, that is the number of LAN interfaces that appears as outgoing interfaces/next-hops. The serial interface is a separate broadcast domain / IP subnet but it is point to point link. Nothing can be said about the remote IP subnets we can guess that IP subnet 192.168.90.0/24 belongs to a LAN interface of another router. This can be counted as the third broadcast domain.
For example, if you have a subnet mask of255.255.255.0, the entire fourth octet should be for host with the two exceptions of .0 which is the network (this is not assigned to a host) and .255 being the last addess / broadcast address.st IP address is the network address (Network ID) of a subnet. In case of sub-netting,first ip address of a subnet may not be 0 and last ip address may not be 255.