To access production applications and data, developers must first connect remotely to a different server. From there, the developers are able to access production data. This best represents a jump box, which is a system on a network used to access and manage devices in a separate security zone. A jump box is a hardened and monitored device that spans two dissimilar security zones and provides a controlled means of access between them1 A jump box is often used to provide transparent management of devices on a DMZ or a production environment once a remote session has been established. The jump box acts as a single audit point for traffic and also a single place where user accounts can be managed. A prospective administrator or developer must log into the jump box in order to gain access to the production assets and all access can be logged for later audit1 The other options do not best represent the scenario. A management plane is a logical part of a network device that provides administrative functions such as configuration, monitoring, and troubleshooting2 A proxy server is a device that acts as an intermediary between a client and a server, providing functions such as caching, filtering, or load balancing3 An out-of-band management device is a device that provides a separate and dedicated channel for network management, such as a console port or a modem. A site-to-site VPN is a secure connection between two or more networks over the internet, using encryption and tunneling protocols.
References:
* https://en.wikipedia.org/wiki/Jump_server