350-401 Question #147: Real Exam Question with Answer & Explanation

Question

In an SD-Access solution what is the role of a fabric edge node?

Options

• Ato connect external Layer 3-network to the SD-Access fabric
• Bto connect wired endpoint to the SD-Access fabric
• Cto advertise fabric IP address space to external network
• Dto connect the fusion router to the SD-Access fabric

Explanation

SD-Access Fabric Edge Node

A fabric edge node serves as the point of attachment for wired endpoints (such as PCs, IP phones, and servers) to the SD-Access fabric, handling functions like endpoint registration, policy enforcement, and VXLAN encapsulation at the network edge.

Why the distractors are wrong:

• Option A describes the role of a fabric border node, which connects external Layer 3 networks (like the internet or data center) to the SD-Access fabric
• Option C also relates to the border node function, which advertises the fabric's IP space to external routing domains via BGP
• Option D is also a border node responsibility, as the fusion router connects to the fabric through border nodes to enable inter-VN routing

Memory Tip: Think of it this way - "Edge = Endpoints." The edge node sits at the edge of the fabric closest to users/devices, while the border node sits at the border between the fabric and the outside world. If you can remember that border nodes handle anything external to the fabric, you can eliminate A, C, and D immediately and confidently select B.

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