SD-WAN: The Future of Network Connectivity

wanThe infrastructure requirements for pushing information through the pathways that make up the Internet were originally established many moons ago by the big monopoly, American Telephone, and Telegraph or AT & T. This monopoly was broken up by antitrust laws in the mid 1900s, however, the infrastructure was then leased out to the many private companies that sprouted up after the break up. In the 1970s the Bell system which is leased by AT & T was converted from analog to digital circuit technology. Dataphone Digital product services were then offered to customers.

Since it is a vastly expensive undertaking in today’s economy with labor being so much more expensive as well as materials, none of these private companies have invested in building a brand new telecommunications infrastructure. Instead, they have extended it with Private Branch Exchanges (PBXs). The use of leased lines that hook up to mainframe computers create the nodes at remote sites. IBM System Network Architecture created the DECnet in 1975 which was the seedbed for the boom that exploded in the early 1980s of telecommunication services, mobile phones, banking terminals or ATMs. The common facility in that stage of the game was the T1 option for data access which quickly evolved into the T3 circuits.

This PBX system is the main reason that all the various companies that provide Internet network communications lease the current infrastructure from the now broken up monopoly, the main lesson of the wires and wireless spokes and hubs of the systems that are essential for propagating the information packages. The Wide Area Network (WAN) was born from the system of PBXs that cropped up with all the Internet Service Providers (ISPs) that blossomed in the 1990s.

Finally, competition and success caused the evolution of telecommunications networking and establishing a new network infrastructure with fiber optic material lines. Speeds increased exponentially for data transport over the Internet. This drastic 10Gbits per second rate in the early 2000s was to fund the fiber optics infrastructure that would replace or provide the infrastructure for the growing networks that are provided by the fastest ISPs. The SD-WAN or software-defined networking is one part of these extremely fast networks enterprise structures that are essential for the operation and control of the hardware. The separation of the network infrastructure from the method of control is the core of this part of data center and virtualization technology.

Network-CablingBecause of the leased lines and the software that will control them, these PBXs will soon be fully replaced. The goal that gave birth to the SD-WAN was to deal more efficiently and less expensively with the network transmission problems such as congestion of packet flow, jitter, and packet loss. Video streaming is now the most important aspect of packet transmission, especially High Definition video transmission. The SD-WAN solution is an innovation that will enhance the legacy routing branch system with vitalization appliances. These appliances become dedicated circuits for packet path transmission and a cheaper mode of Internet linking for long distant transmission.

With this key physical or virtual SD-WAN product application located in the operation of small branch offices, corporate data centers, large offices, and cloud platforms, the set up controller that is centralized for proprietary packet management can function more efficiently. These set ups include four main qualities:

  • the capacity to manage MPLS, frame relay, LTE wireless and higher speed packet transmission
  • The capacity for dynamic path selection to share loads
  • Simple interfaces for enterprise management
  • VPN support, third party WAN controllers, gateways and firewalls