Software-Defined Networking (SDN) in Computer Networks - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Software-Defined Networking (SDN)?

SDN is a way to manage computer networks by separating the control part (which decides where data goes) from the part that actually moves the data. This makes networks easier to control and change.

beginner

What are the two main parts of an SDN architecture?

The two main parts are the control plane, which makes decisions about where traffic should go, and the data plane, which forwards the traffic based on those decisions.

intermediate

How does SDN improve network management compared to traditional networks?

SDN allows network managers to change network behavior quickly through software instead of manually configuring hardware devices. This makes networks more flexible and easier to automate.

beginner

What role does the SDN controller play?

The SDN controller acts like a brain for the network. It communicates with network devices to tell them how to handle data traffic based on the rules set by network administrators.

intermediate

Name one common protocol used for communication between the SDN controller and network devices.

OpenFlow is a common protocol that allows the SDN controller to communicate with switches and routers to control how data packets are handled.

What does the control plane in SDN do?

A Manufactures network hardware

B Physically moves data packets

C Monitors user activity

D Decides where network traffic should go

The control plane makes decisions about routing and managing network traffic.

Which part of SDN forwards the actual data packets?

A Control plane

B Data plane

C Application layer

D Management plane

The data plane is responsible for forwarding data packets based on instructions from the control plane.

What is a key benefit of SDN over traditional networking?

A Separates control and data functions for easier management

B Requires more manual configuration

C Uses only hardware switches

D Eliminates the need for network security

SDN separates control and data planes, making networks easier to manage and more flexible.

Which protocol is commonly used for SDN controller communication?

A HTTP

B FTP

C OpenFlow

D SMTP

OpenFlow is a protocol designed for SDN controllers to communicate with network devices.

In SDN, who typically programs the network behavior?

A Network administrators using software

B Network hardware manufacturers

C End users

D Internet service providers

Network administrators use software to program and control network behavior in SDN.

Explain the main difference between the control plane and data plane in Software-Defined Networking.

Think about who decides and who acts in the network.

Describe how SDN makes network management easier compared to traditional networks.

Consider how changes are made in SDN versus old methods.