350-601 Network Practice Question
Which BGP variant is commonly used in data center EVPN fabrics to carry Layer 2 and Layer 3 network information?
⚠ Common exam trap
Cisco often tests the distinction between the BGP deployment mode (eBGP/iBGP) and the protocol variant (MP-BGP), leading candidates to confuse eBGP or iBGP as the answer when the question specifically asks for the variant that carries Layer 2 and Layer 3 information.
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 (Multiprotocol BGP) is the correct variant because it carries both Layer 2 (MAC/VXLAN) and Layer 3 (IP/VRF) network information in EVPN fabrics via BGP EVPN address families (L2VPN EVPN and IP VPN). It extends BGP with multiprotocol extensions (RFC 4760) to support Network Layer Reachability Information (NLRI) for Ethernet segments, MAC addresses, and IP prefixes, which is essential for VXLAN-based data center fabrics.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
eBGP
Why it's wrong here
eBGP is used between ASes, but MP-BGP is required for EVPN.
- ✓
MP-BGP
Why this is correct
MP-BGP with EVPN address family carries overlay information.
- ✗
iBGP
Why it's wrong here
iBGP is used within an AS, but MP-BGP is needed for EVPN.
- ✗
OSPF
Why it's wrong here
OSPF is an IGP, not used for EVPN.
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.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-601 exam.