300-420 · Question #353
What is the purpose of a border node in a Cisco SD-Access fabric?
The correct answer is B. perform traffic encapsulation and de-encapsulation. In a Cisco SD-Access fabric, a border node's primary purpose is to perform traffic encapsulation and de-encapsulation when connecting the fabric to external networks.
Question
What is the purpose of a border node in a Cisco SD-Access fabric?
Options
- Aexpand a network
- Bperform traffic encapsulation and de-encapsulation
- Cconnect devices to a network
- Dperform network virtualization
How the community answered
(28 responses)- A7% (2)
- B86% (24)
- C4% (1)
- D4% (1)
Why each option
In a Cisco SD-Access fabric, a border node's primary purpose is to perform traffic encapsulation and de-encapsulation when connecting the fabric to external networks.
Expanding a network is a general outcome of network growth, not the specific technical function of an SD-Access border node.
A border node in a Cisco SD-Access fabric serves as the gateway to networks external to the fabric, such as the internet, data center, or other enterprise segments. Its core function involves encapsulating traffic from external networks into the VXLAN overlay for fabric communication and de-encapsulating VXLAN traffic from the fabric before forwarding it to external destinations, thereby bridging the virtualized and physical network domains.
Connecting devices to a network is primarily the role of an edge node (access switch) in a Cisco SD-Access fabric.
Performing network virtualization is a collective function of the entire SD-Access fabric, not solely the purpose of a border node, which specifically handles traffic at the fabric's edge.
Concept tested: Cisco SD-Access border node function
Source: https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Campus/sda_design_guide/sda_design_guide/sd_access_fabric_design.html
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