S16. What are the pros and cons of generalized forwarding?

Question 1

What is generalized forwarding?

Answer 1

Generalized forwarding, also known as Software-Defined Networking (SDN), is a routing method where the decision on how to forward a packet is based on factors other than just the destination address.

Question 2

What are the pros of generalized forwarding?

Answer 2

1. Centralized control, which simplifies network management.
2. It enhances network agility and adaptability by separating the control plane from the data plane, allowing for dynamic traffic engineering and optimization based on application requirements and network conditions.
3. SDN offers network programmability, allowing administrators to automate network configuration and deployment through software-defined policies and scripts. This programmability facilitates accommodating changing business requirements and application needs.

Question 3

What are the cons of generalized forwarding?

Answer 3

1. It can introduce complexity to the network architecture. SDN deployments require specialized hardware, software controllers, and programming skills, which can be challenging for organizations with limited expertise or resources. Managing a software-defined network may require significant training and investment in new technologies.
2. Single point of failure in the software controller. If the controller fails or becomes inaccessible, network communication may be disrupted, affecting the entire network. Redundancy and failover mechanisms are essential to mitigate this risk and ensure network reliability.
3. SDN architectures may introduce new security challenges, including potential vulnerabilities in the controller and communication protocols. Malicious actors may exploit these vulnerabilities to gain unauthorized access to the network or disrupt network operations.

Question 4

What is SDN?

Answer 4

Software-Defined Network is another term for Generalized Forwarding