QuestionQ42

Campus and Branch WAN Design

You must design a branch WAN. The branch locations have limited bandwidth, and minimizing overhead is imperative.

Which technology meets these requirements?

  • A Secure Vector Routing
  • B Generic Routing Encapsulation (GRE)
  • C IPsec
  • D EVPN-VXLAN
Explanation

Secure Vector Routing provides tunnel-free, session-based forwarding that avoids the recurring encapsulation overhead imposed by tunnel technologies. GRE, IPsec, and EVPN-VXLAN add headers to packets, consuming scarce WAN bandwidth; SVR is therefore the most bandwidth-efficient choice.

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