Question 1

What are SD-WAN Solutions?

Accepted Answer

SD-WAN is a wide area network (WAN) architecture used to connect users to applications safely and reduce network management costs. It aids in virtualizing the WAN with centralized control to deploy and manage branch-office services. 
 WAN functionality typically helps to establish a connection between end-users at the workstation and server-based applications in the data center. Usually, dedicated multiprotocol label switching (MPLS) circuits were used to provide a secure and reliable connection. However, on the cloud, SD-WAN technology utilizes virtual private networks (VPN), internet, and wireless services. It helps reduce costs, optimize resources for multisite implementation, and ensure optimal performance of essential applications. 
 What Does SD-WAN Stand For? 
 SD-WAN stands for software-defined wide area network (or networking). WAN  
 is a private telecom network that connects geographically distributed local area networks (LANs). SD-WAN solutions combine software-defined networking (SDN) with WAN connectors to help organizations connect corporate networks across vast geographic locations. 
 What Types of SD-WAN Solutions Exist? 
 The types of SD-WAN are differentiated based on their deployment. There are three types of SD-WAN:   
 On-premises SD-WAN solutions 
 An on-premises SD-WAN solution either replaces or increases the effectiveness of an existing private network. It is deployed within the organization's premises as an SD-WAN box, i.e., a plug-and-play router. The SD-WAN box helps in real-time congestion management and network performance optimization by regulating network data transfer at each site. This SD-WAN architecture connects not to a cloud gateway but to other organizational sites. Hence, it provides complete control over the SD-WAN controller environment.  
 This architecture helps cut down cloud-enablement costs, provides multi-circuit load-balancing functionalities, aids real-time packet or traffic shaping, enhances WAN application performance, and supports disaster recovery (DR). 
 MPLS-based SD-WAN solutions 
 Multiprotocol label switching or MPLS-based SD-WAN architecture consists of multiple appliances placed at network endpoints. These tools create a virtual internet protocol (IP) network between appliances exclusive to the vendor, providing them with end-to-end control of network packets. While SD-WANs offer higher speed and bandwidth at lower costs, some companies utilize MPLS links. This is because MPLS links are network lines dedicated to a particular organization with a low risk of a data breach. 
 Cloud-enabled SD-WAN solutions 
 A cloud-enabled SD-WAN solution has an onsite SD-WAN box connecting to a cloud gateway. This architecture provides the advantages of an on-premises SD-WAN along with enhanced speed and reliability of cloud applications. If the organization’s internet circuit fails while using a cloud-based application, the gateway helps keep the cloud session active. Additionally, if the organization has an alternate internet circuit, the cloud-enabled SD-WAN can re-route the application on the cloud immediately to the alternate circuit, thereby preventing bottlenecks during the session. 
 What are the Common Features of SD-WAN solutions? 
 The following are some core features within SD-WAN software that can help users make the most of them: 
 Zero-touch provisioning: Zero-touch provisioning (ZTP) is a standard feature on most SD-WAN devices. It automatically configures the device using a switch feature that helps IT teams efficiently deploy network devices in a large-scale environment. It eliminates the time, error, and cost of configuring the devices manually. All that is needed is an internet connection so the device can connect and auto-configure quickly, efficiently, and in a standardized manner. This happens through the use of predefined templates. 
 Data analytics: Organizations want their SD-WAN architecture to provide real-time network analytics. This helps provide visibility into the applications running on the corporate network and assists in the timely detection of issues. Some solutions also offer historical logs, which help in diagnosing problems easily. It provides all information and control from a centralized dashboard. 
 Application-aware routing: Cloud-based SD-WANs can bring high degrees of application intelligence. This is achieved through application-aware routing that outlines the paths applications need to take for better app monitoring and management. It enhances application reliability and consistency. SD-WAN solutions can be configured to emphasize business-critical applications and services and direct them via the most efficient route. Application-aware routing helps reduce bandwidth costs by efficiently balancing traffic among diverse circuits. Traffic is automatically directed to WAN links with the necessary network functionalities and path conditions to run these applications in real-time.

Question 2

What are the Benefits of SD-WAN Solutions?

Accepted Answer

With organizations increasingly undergoing digital transformation, traditional network frameworks fall short while accommodating the complexities of most digital transformation initiatives. In such scenarios, SD-WAN benefits businesses in multiple ways, as listed below: 
 High-security level: SD-WAN technology provides a robust connection with full-fledged security. It has built-in security features and encryption capabilities to ensure secure and authorized access to applications on a corporate network. In some instances, the functionality of SD-WAN can be extended to LAN connections of the branch office to enable its security features to protect locally deployed devices and secure direct connections to online resources.  
 Centralized management: SD-WAN provides a policy-driven interface that centrally manages and audits all applications, irrespective of location. It simplifies the management of applications and their performance from a single point. Cloud-based SD-WAN offers integrated and centralized monitoring capabilities to manage and scale networks. 
 Automation: Automation and self-managed protocols of SD-WAN come in handy, especially for small and mid-size businesses (SMBs), as it helps scale down the requirement for an external technical team. It offers automation capabilities, allowing network managers to configure and generate responses to dynamic network traffic conditions. For example, during instances of a dip in the voltage level of the electrical line, the inability of the network to switch over to a reliable backup system, or network congestion, SD-WAN facilitates the automatic switching of applications from one link to another. 
 Cloud connectivity: The SD-WAN tool is beneficial in connecting the branch office traffic to the cloud. It allows employees direct access to cloud applications regardless of location without additional traffic burden to the core network. When using IaaS, a virtual instance of the SD-WAN router can be configured within the cloud service provider’s domain to give IT admins visibility into cloud applications. 
 Cost reduction: With increased movement of applications and services to the cloud, SD-WAN helps in lowering bandwidth costs by efficiently balancing traffic among the diverse circuits

Question 3

Who Uses SD-WAN Solutions?

Accepted Answer

The following personas most commonly use SD-WAN solutions. 
 Finance teams: Companies that offer financial services rely heavily on secure and trustworthy network connections. Despite increasing cybersecurity risks, such organizations' network infrastructure is often compromised due to budget and other constraints. Multiple organizations flounder with outmoded VPN connections and complex, aging MPLS networks that no longer provide secure access to cloud-native applications. Modern SD-WAN solutions leverage internet broadband and 5G or LTE connections at a lower cost than expensive MPLS lines while providing the same benefits. The software also shields financial institutions against the loss of financial data by securely backing it up. 
 Manufacturers: With digitalization, companies in the manufacturing sector are adopting smart manufacturing strategies, which necessitate manufacturers to migrate from traditional WAN to SD-WAN. A manufacturing business comprises warehouses, factories, and branch offices in diverse geographic locations. Manufacturers must be connected to suppliers and distributors to manage the supply chain. The SD-WAN technology adoption helps manufacturers scale quickly to meet business connectivity requirements. It enforces centralized management via an orchestration engine that ensures the optimum allocation of network resources and balances workloads. 
 Retailers: Companies in the retail space have multiple branches in diverse locations that require connecting those locations into a singular network. It is imperative to ensure optimal performance and a high level of security of this network. Retail organizations transmit confidential data, such as customers' credit card details, which must be encrypted and protected. Retailers can use SD-WAN to improve the security of internal networks while also improving performance and speed. 
 Healthcare professionals: Healthcare providers are now adjusting to the fact that patients may want direct access to their healthcare records to review their healthcare data. This would translate to granting individuals access to secure information, which must be done in a way that doesn’t violate security protocols. Additionally, the healthcare sector often has to connect with many third parties. The adoption of SD-WAN technology is crucial to accommodate such requirements for enhancing network security and connectivity.

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