How can a multi-tier architecture benefit a customer’s design?

Multi-Tier Architecture & Stateful Services (Correct Answer - A):

InNSX-T, amulti-tier architectureconsists ofTier-0 (T0) and Tier-1 (T1) Gateways, allowing bettercontrol and placement of stateful servicessuch as:

Load Balancers (LBs)

NAT (Network Address Translation)

Firewall Rules (DFW, Gateway FW)

VPN Services

Tier-1 Gatewayscan be configured to handlestateful services, whileTier-0 Gatewaysfocus on routingNorth-South trafficefficiently.

Incorrect Options:

(B - Cost-Effective for Simple Networks):

Multi-tier architectureis not necessarily cost-effective for simple networks. Instead, asingle-tier deploymentmight be more suitable.

(C - Simplifies Network Topology by Consolidation):

Multi-tiersegregates servicesrather than consolidating them. Itseparates East-West and North-South traffic flowsfor better performance.

(D - Eliminates the Need for EVPN):

Ethernet VPN (EVPN)is a control plane solution forVXLAN overlay networks, mainly used inmulti-site or multi-data center deployments. It isindependentof the multi-tier architecture.

VMware NSX 4.x Reference:

VMware NSX-T Multi-Tier Design Guide

NSX-T Data Center Routing and Gateway Configuration Best Practices