Consider an enterprise network with two Ethernet segments, a web server and a firewall, connected via three routers as shown below.
What is the number of subnets inside the enterprise network?
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Answer: C
A subnet is a distinct IP network segment. Every interface of a router that connects to a separate broadcast domain or a point-to-point link represents a unique subnet. Analyzing the given network diagram, we can identify the following subnets:
- Subnet 1: Ethernet Segment 1 connected to Router 1.
- Subnet 2: Ethernet Segment 2 connected to Router 3.
- Subnet 3: The point-to-point link connecting Router 1 to the Web Server.
- Subnet 4: The point-to-point link connecting Router 3 to the Firewall.
- Subnet 5: The point-to-point link connecting Router 1 and Router 2.
- Subnet 6: The point-to-point link connecting Router 2 and Router 3.
Therefore, there are a total of 6 subnets inside the enterprise network.
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