Exam CCSP topic 1 question 175 discussion

D is incorrect, A: Routing is correct, Routing is taken over the management plane!!! SDN contains a Management Plane & a Forwarding Plane, in the second one goes as well the Filtering The concept of Software Defined Networking (SDN) is about taking the routing control away from the individual network elements, and putting it in the hands of a centralized control layer - for example Nevion VideoIPath orchestration and SDN control system. https://techex.co.uk/ip-production/software-defined-network-sdn-routing#:~:text=Software%20Defined%20Network%20%28SDN%29%20routing%20The%20concept%20of,example%20Nevion%20VideoIPath%20orchestration%20and%20SDN%20control%20system.

Filtering is abstracted from forwarding because SDN separates the control plane from the data plane.

In Software-Defined Networking (SDN), the control plane (which makes decisions about where traffic should be sent) is separated from the data plane (which forwards traffic based on those decisions). This means that routing decisions are abstracted from the actual forwarding of traffic. In traditional networking, routing is performed by each individual network device. In SDN, however, a centralized SDN controller manages the routing logic and pushes forwarding rules to network devices dynamically. Why the other options are incorrect: B. Session → SDN doesn’t directly manage sessions; session management occurs at higher layers. C. Filtering → Filtering (e.g., ACLs) can be centrally controlled in SDN but is still enforced at the data plane. D. Firewalling → Firewalls still inspect and block traffic as needed, but SDN enables more dynamic policy enforcement.

So the correct interpretation for the question could be that SDN abstracts filtering from the traffic forwarding process. The controller decides which traffic should be allowed, blocked, or redirected (filtering), and the network devices apply these instructions while forwarding the traffic.

should be A

n traditional networking, routing decisions are typically made within network devices such as routers, which determine the path for traffic to reach its destination based on various routing protocols and algorithms. In SDN, the control plane, managed by a centralized controller, abstracts the routing functionality. It is responsible for making routing decisions and programming the forwarding behavior of network devices.

should be A

Answer is A:Routing.

filtering traffic C

networking is abstracted from the forwarding of traffic. Keyword is abstracted here. Thus, the answer will be filtering.

Should be routing

At first I thought this was routing, but we are not routing traffic. We are forwarding so we are filtering this to a destination or port.