.1-4. What type of control plane? We've seen that there are two approaches towards implementing the network control plane - a per-router control-plane approach and a software-defined networking (SDN) control-plane approach. Which of the following actions occur in a per-router control-plane approach? The other actions that you don't select below then correspond to actions in an SDN control plane. Group of answer choicesA control agent in router receives a complete forwarding table, which it installs anduses to locally control datagram forwarding.A router exchanges messages with another router, indicating the cost for it (the sending router) to reach a destination host.All routers in the network send information about their incoming and outgoing links to a logically centralized controller.Routers send information about their incoming and outgoing links to other routers in the network.
Question
.1-4. What type of control plane? We've seen that there are two approaches towards implementing the network control plane - a per-router control-plane approach and a software-defined networking (SDN) control-plane approach. Which of the following actions occur in a per-router control-plane approach? The other actions that you don't select below then correspond to actions in an SDN control plane. Group of answer choicesA control agent in router receives a complete forwarding table, which it installs anduses to locally control datagram forwarding.A router exchanges messages with another router, indicating the cost for it (the sending router) to reach a destination host.All routers in the network send information about their incoming and outgoing links to a logically centralized controller.Routers send information about their incoming and outgoing links to other routers in the network.
Solution
In a per-router control-plane approach, the following actions occur:
- A control agent in the router receives a complete forwarding table, which it installs and uses to locally control datagram forwarding.
- A router exchanges messages with another router, indicating the cost for it (the sending router) to reach a destination host.
- Routers send information about their incoming and outgoing links to other routers in the network.
The action where "All routers in the network send information about their incoming and outgoing links to a logically centralized controller" corresponds to actions in an SDN control plane. In SDN, the control plane is decoupled from the hardware and implemented in a software application, hence the centralized controller.
Similar Questions
4.1-3. The control plane versus the data plane. For each of the actions below, select those actions below that are primarily in the network-layer data plane. The other actions that you don't select below then correspond to control-plane actions. Group of answer choicesLooking up address bits in an arriving datagram header in the forwarding table.Computing the contents of the forwarding table.Moving an arriving datagram from a router’s input port to output portDropping a datagram due to a congested (full) output buffer.Monitoring and managing the configuration and performance of an network device.
With respect to Software Defined Networking (SDN), which among the following is true? a. SDN couples the data plane and control plane. b. SDN has no relation to either data plane or control plane c. SDN separates the data plane and control plane. d. None of the stated.
Which network device plane provides the traffic forwarding function?control planemanagement planedata planeforwarding plane
Which network device plane builds the structures required for traffic forwarding?data planemanagement planeforwarding planecontrol plane
In SDN, which component is responsible for translating high-level policy into device-specific configurations?SDN ApplicationNetwork Operating SystemSDN ControllerNetwork Forwarding Device
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