---
title: "Concepts overview"
description: "SecNumCloud Connectivity - Concepts overview"
url: https://docs.ovhcloud.com/es/guides/hosted-private-cloud/powered-by-vmware/snc-connectivity-concepts-overview
lang: es
lastUpdated: 2021-11-18
---
# Concepts overview

## What is SNC Connectivity ?

OVHcloud SecNumCloud products need a secured connection to meet compliancy requirements. Such connection is secured using IPsec protocol from vRack for external connectivity and through a secured link between SecNumCloud zones.

## Benefits

### Network extension

From vRack, IPsec tunnels can be extended with any OVHcloud product in vRack, including, and not limited, OVHcloud Connect for remote IPsec endpoints.

### Performance

OVHcloud use dedicated hardware appliance to achieve best performance and provide high bandwidth connection, from external and between SecNumCloud zones.

### High Availability

IPsec connection is provided through two devices (per SecNumCloud zone) and BGP in IPsec tunnels enable maximum resiliency.

## Components

![SNC Network Global Overview](/images/hosted-private-cloud/powered-by-vmware/snc-connectivity-concepts-overview/SNC-Global-Network.svg)
### Subnet

- A subnet is composed of one IPv4 prefix. Maximum supported size: /24
- SecNumCloud products are attached to subnets.
- A subnet is only available in one SecNumCloud zone, it can not be strechted between datacenters or between SecNumCloud and non-SecNumCloud zones.

### SPN

SPN means Secure Private Network. It is the routing instance containing subnets.

### SPN Connector

Its purpose is to route trafic between SPN. By default, an SPN Connector is local to a SecNumCloud zone and can be upgraded to global on several SecNumCloud zones.

### VPN-SPN

The VPN-SPN manages the external network connectivity through the IPsec protocol.

## Go further

If you need training or technical assistance to implement our solutions, contact your sales representative or click on [this link](https://www.ovhcloud.com/es-es/professional-services/) to get a quote and ask our Professional Services experts for assisting you on your specific use case of your project.

Join our [community of users](https://community.ovhcloud.com/community/en).