200-901 Question 187
Single answerYou are reviewing a basic network topology diagram for a small office network. The diagram includes two switches connected to a router. End devices such as PCs and printers are connected to the switches. The router connects to an ISP modem for internet access. What can you infer about the purpose of the router in this topology?
- A
The router provides Layer 2 switching between devices on the network.
- B
The router enables communication between the internal network and external networks such as the internet.
- C
The router assigns IP addresses to all end devices and manages VLANs across the switches.
- D
The router is responsible for directly connecting all end devices such as PCs and printers to the network.
Show answer and explanation
Correct answer: B
Explanation
In a basic network topology, the router's primary role is to route traffic between the internal network (LAN) and external networks (such as the internet). The switches handle Layer 2 communication between end devices, while the router operates at Layer 3 to manage IP traffic and provide internet connectivity.
- A. Incorrect.
This is incorrect because Layer 2 switching is the function of switches, not routers. Routers operate at Layer 3 (network layer).
- B. Correct.
This is correct because the router's role in this topology is to enable communication between the internal network and external networks, such as the internet, by routing IP traffic.
- C. Incorrect.
This is incorrect because routers do not typically manage VLANs across switches. VLAN management is a function of switches, and IP address assignment is typically handled by a DHCP server or the router's DHCP feature.
- D. Incorrect.
This is incorrect because the router does not directly connect end devices like PCs and printers. These devices are connected to the switches, which then communicate with the router.