Designing Cisco Enterprise Networks (ENSLD) — Question 43

An architect is working on a design to connect a company's main site to several small to medium-sized remote branches. The solution must include redundant
WAN links, but the customer has a limited budget and wants the ability to increase the link speed easily in the future. QoS will run on the branch routers, so there is no need for consistent end-to-end QoS. Which solution does the architect propose?

Answer options

• A. dual-homed WAN MPLS with single-edge router
• B. dual-homed Internet with a single-edge router running a site-to-site VPN topology
• C. dual-homed WAN MPLS and Internet links via dual-edge routers
• D. dual-homed Internet with dual-edge routers running a hub-and-spoke VPN topology

Correct answer: B

Explanation

The correct answer is B because it provides redundancy through dual-homed Internet connections while keeping costs lower with a single-edge router, which allows for easy upgrades in the future. Options A and C involve MPLS, which may be more expensive and complex than the customer’s budget allows. Option D, while it offers redundancy, introduces additional complexity and cost with dual-edge routers that may not be necessary given the customer’s requirements.