Difference between Traditional WAN and SD WAN

Prerequisite – Local Area Network & Wide Area Network

1. Traditional WAN :
Traditional network is based on completely hardware network devices which mostly rely on Multi Protocol Label Switching (MPLS) for resilient and efficient network traffic flow. Number of hardware devices are installed along with proprietary circuits to route IP services to their intended clients. IT teams gives a lot great effort to manage the network as it involves layers of underlying hardware installed.

Scaling of traditional network is difficult as it needs a proper advanced planning along with required network infrastructure to set up and run. A Traditional connects many Local Area Networks (LANs) and Virtual Private Networks (VPNs) and it is limited to enterprise, branch, and data center. It allows to prioritize your data, voice, and video traffic on network. Security issues and management difficulties are the major problems in traditional WAN now a days.

2. Software Defined Wide Area Network (SD WAN) :
SD WAN stands for Software Defined Wide Area Network which is a software defined approach to manage Wide Area Network. In SD WAN software controls everything starting from connectivity to management and providing service. It is a virtual network approach which combines traditional WAN technologies, such as MPLS, LTE and broadband connections.

SD WAN is good for global enterprises as it provides a better and secure application performance as well as optimized cloud connectivity and simplified management. Means in the cloud centric world SD WAN are more preferable than traditional WAN. Software Defined Network (SDN) is utilized which helps in determining the optimal way of routing.





Difference between Traditional WAN and SD WAN :

S.No. TRADITIONAL WAN SD WAN
01. Traditional WAN provides a conventional approach of managing Wide Area Network. Software Defined WAN provides a software defined approach of managing Wide Area Network.
02. It fails to provide a better flexibility in WAN management. It provides a better flexibility in WAN management.
03. New configuration and scale up takes very high time. New configuration and scale up takes very low time.
04. In traditional network configuration is done by skilled resources means requires human intervention. In SD WAN network configuration is done by automatically without requiring human intervention.
05. It does not provide low cost and high speed connectivity. It provides low cost and high speed connectivity.
06. It provides low performance for the application in cloud as it connects to intermediate hub then to cloud. It provides high performance for the application in cloud as it directly access applications hosted in cloud.
07. In traditional WAN, Data centers are limited in their capacity to deal with incoming connections to multiple cloud platforms. In Software Defined WAN, Data centers are not limited based on underlying hardware that comprises the network.
08. Traditional WAN increases the the complexity associated with management, configuration and infrastructure arrangement of WANs. Software Defined WAN simplifies the complexity associated with management, configuration and infrastructure arrangement of WANs.
09. Traditional WAN solutions may not provides secure VPN like SD WAN and also fails to fully integrate additional features like firewall, Wan Optimization, SWG etc. SD WAN solutions provides secure VPN than traditional WAN and also integrates additional features like firewall, Wan Optimization, SWG etc.
10. Traditional WAN is secure over an MPLS connection as packets that are sent are private as well as packet loss is avoided. SD WAN provides a secured data traffic through end-to-end encryption over a virtual private network (VPN) connection also integrates additional security features.

Attention reader! Don’t stop learning now. Get hold of all the important CS Theory concepts for SDE interviews with the CS Theory Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up

I am a Computer Science Engineering student, have a great interest in android application development & now mostly focusing on Internet of Things (IoT) applications

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.