Remote Access Technologies

A set of vocabulary-style flashcards covering Telnet, SSH, RDP, RDG, VNC, VDI, in-band vs out-of-band management, APIs (REST/SOAP), DaaS, common ports, and VPN as used in remote access contexts.

Telnet

A text-based remote access protocol operating on port 23; sends data in plaintext and is not secure for configuring network devices; use encrypted alternatives.

SSH

Secure Shell; encrypted remote access protocol on port 22; protects CLI access to routers, switches, and firewalls; preferred over Telnet.

RDP (Remote Desktop Protocol)

GUI-based remote access protocol on port 3389; primarily for Windows; not secure by itself and can be tunneled via RDG or VPN.

RDG (Remote Desktop Gateway)

Windows server role that creates an SSL/TLS tunnel for RDP; enables secure remote connections without a full VPN and provides access control and monitoring.

VNC (Virtual Network Computing)

Remote desktop protocol on port 5900; cross-platform GUI sharing; used with VDI and supports Linux, macOS, and Windows.

VDI (Virtual Desktop Infrastructure)

Centralized hosting of desktop environments as virtual machines; desktop as a service (DaaS) in cloud terms; accessed via web browser or thin client.

In-band management

Managing devices over the same network used for data traffic (e.g., configuring routers via SSH on the LAN).

Out-of-band management

Separate, dedicated management network/path for configuring devices; enhances security by isolating management from user traffic.

API (Application Programming Interface)

Set of protocols and routines allowing software systems to communicate; enables automation and integration with cloud services; commonly REST or SOAP.

REST (Representational State Transfer)

Architectural style for APIs that typically use JSON; standard approach for modern RESTful services.

SOAP (Simple Object Access Protocol)

Protocol for exchanging structured information in web services; used in some legacy or enterprise APIs.

DaaS (Desktop as a Service)

Cloud-based delivery of desktop environments; in VDI terms, the desktop image is provided as a service over the network.

Common remote access ports

Telnet 23; SSH 22; RDP 3389; VNC 5900 — ports associated with primary remote access technologies.

VPN (Virtual Private Network)

Creates an encrypted tunnel over a public network to secure remote sessions or to tunnel other protocols like RDP.