Which of the following statements about the NSG vports is TRUE?

The Network Services Gateway (NSG) acts as the Layer 3 gateway for endpoints connected to its host vports. A primary function in this role is to manage the IP address lifecycle for the connected host. The Nuage VNS (Virtualized Network Services) system, of which the NSG is a key component, allocates an IP address from the vport's associated subnet. The NSG then uses its integrated DHCP server to deliver this IP configuration to the host. Therefore, the NSG is the entity that directly handles the IP address assignment for the host. This is a core capability of the NSG in the VNS architecture.

A. This is the mechanism, not the fundamental role. The NSG's primary function is handling IP assignment; responding to DHCP requests is the common method, making statement D more comprehensively correct.

B. Host vports typically enforce security policies like MAC anti-spoofing. The MAC address is learned once and locked, or statically assigned, not continuously and dynamically learned as on a standard switch.

C. A host vport is an access port designed for a single endpoint. Connecting multiple devices via an external switch requires a different vport type, such as a network or bridge port.

1. Nokia Nuage Networks™ Virtualized Network Services (VNS) Fundamentals Guide, Release 20.10.R1, Section: "VNS Components", Sub-section: "Network Services Gateway (NSG)". This section describes the NSG's role as a CPE/gateway device that extends the L2/L3 network to branch locations. It details its function in providing DHCP and gateway services to locally connected hosts.

2. Nokia Nuage Networks™ Virtualized Network Services (VNS) User Guide, Release 20.10.R1, Chapter: "vPorts", Section: "vPort overview". This chapter distinguishes between access (host) vports and network vports. It clarifies that access vports are for connecting endpoints and that the NSG provides L3 services, including IP addressing, to these endpoints. The guide also details MAC anti-spoofing, contradicting dynamic learning.

3. Nokia Nuage Networks™ Virtualized Network Services (VNS) User Guide, Release 20.10.R1, Chapter: "Subnets". This chapter explains that subnets are blocks of IP addresses for endpoints and that "The Nuage Networks VNS solution provides a distributed DHCP service for each subnet." The NSG is the component that implements this service for physical branch endpoints. This confirms the NSG's role in handling IP assignment.