400-007 · Question #105
Company XYZ is in the process of identifying which transport mechanism(s) to use as their WAN technology. Their main two requirements are. - a technology that could offer DPI, SLA, secure tunnels…
The correct answer is A. Software-defined WAN should be the preferred choice because it complements both. SD-WAN is the optimal WAN technology choice when requirements include both advanced enterprise features and cost-effectiveness, as it delivers all listed capabilities over cost-efficient transport.
Question
Company XYZ is in the process of identifying which transport mechanism(s) to use as their WAN technology. Their main two requirements are.
- a technology that could offer DPI, SLA, secure tunnels, privacy, QoS,
scalability, reliability, and ease of management
- a technology that is cost-effective
Which WAN technology(ies) should be included in the design of company XYZ?
Options
- ASoftware-defined WAN should be the preferred choice because it complements both
- BInternet should be the preferred option because it is cost effective and supports BFD, IP SLA. and
- CBoth technologies should be used. Each should be used to back up the other one; where the
- DMPLS meets all these requirements and it is more reliable than using the Internet. It is widely
How the community answered
(26 responses)- A77% (20)
- B8% (2)
- C4% (1)
- D12% (3)
Why each option
SD-WAN is the optimal WAN technology choice when requirements include both advanced enterprise features and cost-effectiveness, as it delivers all listed capabilities over cost-efficient transport.
SD-WAN satisfies both requirements simultaneously by providing DPI, application-aware routing, IPsec secure tunnels, QoS, SLA monitoring, centralized management, and scalability through a software overlay. Unlike MPLS alone, SD-WAN runs over commodity internet links, making it significantly more cost-effective while still meeting enterprise-grade reliability and privacy needs. Its controller-based architecture also simplifies management at scale.
The internet alone lacks native support for DPI, SLA guarantees, and built-in QoS without additional overlay technologies, making it insufficient to meet all listed enterprise requirements on its own.
Using both technologies purely as mutual backups does not address the unified requirement for cost-effectiveness combined with enterprise features; SD-WAN already abstracts both transports under a single policy framework.
MPLS does not natively provide DPI, secure tunnels, or ease of centralized management, and its cost is significantly higher than internet-based alternatives, failing the cost-effectiveness requirement.
Concept tested: SD-WAN capabilities vs. traditional WAN technologies
Source: https://www.cisco.com/c/en/us/solutions/enterprise-networks/sd-wan/what-is-sd-wan.html
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