350-601 Network Practice Question
Which THREE components are part of an EVPN VXLAN fabric? (Choose three)
⚠ Common exam trap
Cisco often tests the distinction between underlay protocols (like IS-IS or OSPF) and overlay components (like MP-BGP, NVE, VRF), and candidates mistakenly select an underlay protocol as part of the EVPN VXLAN fabric.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
MP-BGP
MP-BGP is the control plane protocol for EVPN VXLAN fabrics. It advertises MAC/VPN reachability information using EVPN address families (L2VPN AFI/SAFI 70/128) and enables overlay route distribution between VTEPs. Without MP-BGP, the fabric cannot dynamically learn remote MAC addresses or maintain a scalable, loop-free control plane.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
IS-IS
Why it's wrong here
IS-IS is used for underlay routing but is not mandatory; OSPF or static routing can be used instead.
- ✓
MP-BGP
Why this is correct
MP-BGP is the standard control plane for EVPN, advertising MAC/IP routes and other attributes.
- ✓
VRF
Why this is correct
VRFs provide tenant isolation and are associated with VNIs for segmentation.
- ✓
NVE interface
Why this is correct
The NVE (Network Virtualization Edge) interface is the tunnel endpoint that encapsulates/decapsulates VXLAN packets.
- ✗
VPC
Why it's wrong here
VPC is a switch-level redundancy feature, not a component of the EVPN VXLAN architecture.
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
Go deeper
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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