Software Defined Networking (SDN) Fundamentals
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Questions and Answers

What is the main limitation of traditional networking compared to self-driving cars?

  • Inability to create virtual networks
  • Unreliability of network infrastructure
  • Lack of automation in configuration (correct)
  • Insufficient scalability for large environments

    • What is the primary goal of Software Defined Networking?

  • To improve network scalability
  • To reduce network latency
  • To increase network security
  • To simplify network configuration and management (correct)

    • What is the data plane in Software Defined Networking?

  • The movement of packets across the network (correct)
  • The virtualization of network infrastructure
  • The process of configuring network devices
  • The control center for network management

    • What is the key benefit of applying the concept of self-driving cars to networking?

    <p>Automated network configuration and management</p> Signup and view all the answers

    What is the main difference between traditional networking and Software Defined Networking?

    <p>Level of automation in configuration and management</p> Signup and view all the answers

    What is the primary advantage of Software Defined Networking in large environments?

    <p>Simplified network management and configuration</p> Signup and view all the answers

    What is the equivalent of a self-driving car in Software Defined Networking?

    <p>A network device with automated configuration</p> Signup and view all the answers

    What is the key concept behind Software Defined Networking?

    <p>Automation of network configuration and management</p> Signup and view all the answers

    What is the primary function of the management plane in a network?

    <p>To configure and manage network devices</p> Signup and view all the answers

    Which plane is responsible for making decisions about how to forward traffic in a network?

    <p>Control plane</p> Signup and view all the answers

    What is the primary goal of Software Defined Networking (SDN)?

    <p>To enable centralized management and control of network devices</p> Signup and view all the answers

    What is the role of a controller in Software Defined Networking?

    <p>To receive instructions from administrators and control network devices</p> Signup and view all the answers

    What is the term used to describe the process of configuring and managing network devices?

    <p>Management plane</p> Signup and view all the answers

    In Software Defined Networking, what is the term used to describe the instructions given to the controller?

    <p>Intent</p> Signup and view all the answers

    What is the primary difference between the traditional network management approach and Software Defined Networking?

    <p>SDN uses a centralized management approach</p> Signup and view all the answers

    Which of the following is an example of the control plane in action?

    <p>Determining which path to use for forwarding traffic</p> Signup and view all the answers

    What is the term used to describe the movement of data in a network?

    <p>Data plane</p> Signup and view all the answers

    What is the primary benefit of using a controller in Software Defined Networking?

    <p>Simplified network management and configuration</p> Signup and view all the answers

    What is the primary function of the controller in a Software Defined Network?

    <p>To make decisions about how to forward and where to forward data</p> Signup and view all the answers

    What is the role of vSmart in Cisco's SDWAN solution?

    <p>To rain down configurations to edge devices</p> Signup and view all the answers

    What is the main benefit of Software Defined Networking in terms of device management?

    <p>It moves the control plane to the controller</p> Signup and view all the answers

    What is the function of vBond in Cisco's SDWAN solution?

    <p>To act as an orchestrator authenticating new devices</p> Signup and view all the answers

    What is the primary goal of Software Defined Networking in terms of network management?

    <p>To reduce network management complexity</p> Signup and view all the answers

    What is the role of the controller network in Cisco's SDWAN solution?

    <p>To specify network intent and implement the network</p> Signup and view all the answers

    What is the term for the way computers or programs talk to each other?

    <p>API</p> Signup and view all the answers

    What is the main difference between traditional networking and Software Defined Networking?

    <p>Traditional networking has each device in charge of its own control plane, while Software Defined Networking has a controller in charge of that</p> Signup and view all the answers

    What is the benefit of Software Defined Networking in terms of device deployment?

    <p>It makes device deployment easier and faster</p> Signup and view all the answers

    What is the role of vManage in Cisco's SDWAN solution?

    <p>To specify what we want to have happen on the network</p> Signup and view all the answers

    What is the primary function of a controller in Software Defined Networking?

    <p>To specify the intent and carry out the implementation across the network</p> Signup and view all the answers

    What is the main advantage of using Software Defined Networking?

    <p>It simplifies ongoing operations and maintenance</p> Signup and view all the answers

    What is a major limitation of implementing Software Defined Networking?

    <p>It's expensive to get started</p> Signup and view all the answers

    What is an example of the controller concept in Software Defined Networking?

    <p>Controlling access points in a wireless network</p> Signup and view all the answers

    What is the name given to the concept of working with a controller to specify what you want and having the controller carry out that intent across the network?

    <p>Intent-based networking</p> Signup and view all the answers

    Without Software Defined Networking, what would be difficult to manage when moving a computer around?

    <p>Every possible interface or path between the computer and a server</p> Signup and view all the answers

    What is the benefit of having a controller in Software Defined Networking?

    <p>It simplifies ongoing operations and maintenance</p> Signup and view all the answers

    What is the primary goal of Software Defined Networking?

    <p>To simplify network deployment and maintenance</p> Signup and view all the answers

    Study Notes

    Software Defined Networking (SDN)

    Goal: to simplify network management and configuration, inspired by self-driving cars

    Concept: specify intent to a controller, which then implements and configures network devices

    Benefits: easier operations, maintenance, and deployment, reduced need for manual configuration

    Yes, you are correct. Not all networking equipment is inherently compatible with Software Defined Networking (SDN). Traditional network devices often use fixed, closed protocols and do not provide the programmability or level of abstraction required for SDN. For a network to be SDN-compatible, the devices typically need to support open standards such as OpenFlow or have programmable interfaces that can interact with an SDN controller. This may involve upgrading existing hardware, using SDN-enabled devices, or implementing software overlays to enable SDN functionalities in legacy environments.

    Data, Management, and Control Planes

    • Data Plane: actual movement of data across the network, includes packets and devices involved in the path (routers, switches, etc.)

    • Management Plane: process of communicating with and configuring network devices, performed by administrators

      Control Plane: sorting out how to forward traffic, deciding which path to take, and informing devices of decisions

      The Management Plane and the Control Plane serve distinct functions in network architecture.

      The Management Plane focuses on the administrative aspects of the network. It involves tasks performed by network administrators, such as communicating with and configuring network devices. This plane allows for the management and monitoring of the network's overall health, performance, and configuration settings. Tools like command-line interfaces (CLI), Simple Network Management Protocol (SNMP), and various network management systems are typically used within the Management Plane to execute these tasks.

      On the other hand, the Control Plane is responsible for the network's decision-making processes. It determines how to forward traffic through the network by deciding the optimal paths and routes for data to travel. The Control Plane's responsibilities include creating and maintaining routing tables, managing topology information, and disseminating policy decisions to network devices. Protocols such as Open Shortest Path First (OSPF), Border Gateway Protocol (BGP), and Intermediate System to Intermediate System (IS-IS) operate within this plane to ensure effective and efficient data tra nsmission.

      In essence, the Management Plane handles configuration and oversight by human administrators, while the Control Plane handles automated decision-making processes to forward data through the network.

    SDN in Action

    • Controller: device or software that takes instructions from administrators and configures network devices
    • APIs: Application Programming Interfaces are software structures that allow different applications, systems, and services to communicate and exchange information with each other, enabling controllers to interact with network devices in a standardized way.
    • vManage: component of Cisco's SDWAN solution, used to specify intent (e.g., tunnels and overlays)
    • vSmart: component of Cisco's SDWAN solution, rains down configurations to edge devices
    • vBond: component of Cisco's SDWAN solution, authenticates and links devices to vSmart

    Intent-Based Networking

    • Intent: specify what you want to happen on the network (e.g., access to specific servers)
    • Controller: carries out and implements intent across the network
    • Benefits: easier to manage and maintain network, reduced complexity

    Wireless Access Points

    • Controller Concept: used to manage multiple access points, ensuring coordinated frequencies and delivering intended Wi-Fi access
    • Benefits: simplified management, reduced overlapping frequencies

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    Description

    Learn about Software Defined Networking, a technology that simplifies network management and configuration. Understand the data, management, and control planes, and how SDN benefits operations, maintenance, and deployment.

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