What is the purpose of Cisco vBond as a Session Traversal Utilities for NAT server?

Question

Options

• Asecure data traffic between Cisco Catalyst SD-WAN edge routers that use IPsec
• Bintegrate Cisco SD-Access Wireless into the fabric
• Callow Cisco Catalyst SD-WAN routers to locate their own mapped IP addresses
• Dprovide Zero-Touch Provisioning to Cisco Catalyst SD-WAN vEdge devices

• A
  3% (1)
• C
  7% (2)
• D
  90% (27)

Explanation

Cisco vBond is the orchestration component of the Catalyst SD-WAN (formerly Viptela) architecture and is the first controller that every WAN edge device must reach. vBond acts as a STUN (Session Traversal Utilities for NAT) server to help WAN edge devices that sit behind NAT firewalls discover their own public (mapped) IP address and port - information they need to establish authenticated control and data plane connections. In the ZTP context, vBond is the entry point: it authenticates the device certificate, informs it of the vSmart and vManage controller addresses, and orchestrates the initial bring-up, effectively enabling Zero-Touch Provisioning. Options A and B are unrelated to vBond's STUN role. Option C describes the STUN mechanism itself but not the higher-level purpose, which is enabling the ZTP orchestration workflow.

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