4.1-4. 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 choicesAll routers in the network send information about their incoming and outgoing links to a logically centralized controller.A router exchanges messages with another router, indicating the cost for it (the sending router) to reach a destination host.A control agent in router receives a complete forwarding table, which it installs anduses to locally control datagram forwarding.Routers send information about their incoming and outgoing links to other routers in the network.
Question
4.1-4. 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 choicesAll routers in the network send information about their incoming and outgoing links to a logically centralized controller.A router exchanges messages with another router, indicating the cost for it (the sending router) to reach a destination host.A control agent in router receives a complete forwarding table, which it installs anduses to locally control datagram forwarding.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:
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A router exchanges messages with another router, indicating the cost for it (the sending router) to reach a destination host. This is typically done using routing protocols like OSPF or BGP where routers exchange information about their routing tables.
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A control agent in a router receives a complete forwarding table, which it installs and uses to locally control datagram forwarding. In a per-router control plane, each router independently calculates its forwarding table based on the information it has received from other routers.
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Routers send information about their incoming and outgoing links to other routers in the network. This is part of the process of building and maintaining the network topology, which is a key aspect of the per-router control plane approach.
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 data plane and is centralized, allowing for a more global view of the network state.
Similar Questions
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.
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.
Which network device plane provides the traffic forwarding function?control planemanagement planedata planeforwarding plane
In software defined network architecture, what function is removed from network devices and performed by an SDN controller?
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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