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200-301 · Question #486
200-301 Question #486: Real Exam Question with Answer & Explanation
The correct answer is B: Router. When traffic is sent between devices on different IP subnets, a router is responsible for verifying IP addresses and forwarding the packet.
Submitted by mateo_ar· Mar 5, 2026Network Fundamentals
Question
Refer to the exhibit. When PC-A sends traffic to PC-B, which network component is in charge of receiving the packet from PC-A verifying the IP addresses, and forwarding the packet to PC-B?
Options
- ALayer 2 switch
- BRouter
- CLoad balancer
- Dfirewall
Explanation
When traffic is sent between devices on different IP subnets, a router is responsible for verifying IP addresses and forwarding the packet.
Common mistakes.
- A. A Layer 2 switch forwards frames based on MAC addresses within the same broadcast domain (VLAN/subnet) and does not inspect or forward traffic based on IP addresses between different subnets.
- C. A load balancer distributes incoming traffic among multiple servers to optimize resource utilization and is not primarily responsible for basic inter-subnet packet forwarding between client devices.
- D. A firewall filters traffic based on security rules, but its primary function is not to perform the fundamental forwarding of packets between different IP subnets.
Concept tested. Router Layer 3 forwarding function
Reference. https://www.cisco.com/c/en/us/products/routers/what-is-a-router.html
Topics
#Router functions#IP forwarding#Layer 3 forwarding
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