200-301 · Question #1272
200-301 Question #1272: Real Exam Question with Answer & Explanation
The correct answer is C: It exchanges topology information with other routers.. The Control Plane is the part of the router/Layer 3 Switch architecture that is concerned with drawing the network map, or the information in a routing table that defines what to do with incoming packets. In a routed network, this planning and learning can be done through static
Question
What is a functionality of the control plane in the network?
Options
- AIt looks up an egress interface in the forwarding information base.
- BIt forwards traffic to the next hop.
- CIt exchanges topology information with other routers.
- DIt provides CLI access to the network device.
Explanation
The Control Plane is the part of the router/Layer 3 Switch architecture that is concerned with drawing the network map, or the information in a routing table that defines what to do with incoming packets. In a routed network, this planning and learning can be done through static routes, where we train the Layer 3 device about remote networks, and how to get there. We can also use dynamic routing protocols, like RIP, OSPF and EIGRP to allow the routers to train each other regarding how to reach remote networks. This is all the control plane. Another way of calling control plane is “The process of learning what we will do before we send the packet or frame.”
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