Which two protocols can be used by Fabric Composer to configure the underlay network? (Select TWO)

Question

Options

• AOSPF
• BBGP
• CDNS
• DNTP

• A
  92% (45)
• C
  4% (2)
• D
  4% (2)

Explanation

OSPF and BGP are both Layer 3 routing protocols, which is exactly what's needed to establish IP reachability across the underlay network - the physical infrastructure that carries encapsulated fabric traffic between devices like spine and leaf switches. Fabric Composer (used in data center fabric automation, such as with VXLAN/BGP-EVPN deployments) supports both OSPF and BGP as underlay routing options, giving operators flexibility depending on scale and design preference.

DNS is a name resolution service that maps hostnames to IP addresses - it plays no role in routing traffic or building the underlay topology. NTP is a time synchronization protocol, critical for log accuracy and certificate validity, but it has nothing to do with configuring routing paths in the underlay.

Memory tip: Think "routing protocols configure routing" - OSPF and BGP are both routing protocols (Layer 3), while DNS and NTP are supporting services (name resolution and time sync). If a protocol doesn't build a routing table, it can't configure the underlay.

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