Software-defined networking (SDN) has a lot to talk about, but using SDN data centers can still be dominated by operators. However, the software-defined WAN (SD-WAN) has become a hot technology, and many branches, especially the retail industry, have turned to SD-WAN.
The office space of modern enterprises is becoming more and more scattered. With the increase of the number of collaboration software and the adoption of cloud applications, software as a service is becoming more and more. From CRM, email, ERP, relying on wide area network (WAN) ) Transfer. Once the WAN fails, the branch business will almost certainly stop.
For more than a decade, WAN technology has changed little, but services that rely on wide-area networks have continued to increase. Enterprises generally adopt MPLS, which is an IP-VPN leased line. But more and more companies are setting up VPNs with Internet broadband, replacing MPLS, and even adopting LTE as backup to reduce expenses.
MPLS leased line costs are high, cross-border leased lines are expensive, different MPLS operators have different coverage ranges, delivery time is sometimes difficult to predict, and with contract bundling, MPLS can provide end-to-end bandwidth guarantee, price and management. Many companies have turned to the Internet.
However, the Internet does not have the quality assurance of services, but it has the advantages of low cost and simple delivery. Although MPLS technology can set application priorities, it relies on the operator to tag different protocols within the router, and users cannot set and modify it themselves.
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