RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Keep Your Virtual Machines and Hosts Talking Without a TCP/IP Connection

You don't need to pay for a connection to the Net when you're working remotely. Loopback adapters enable a disconnected machine to have a working TCP/IP stack.




Building the Right Environment to Support AI, Machine Learning and Deep Learning

mong other things, virtual machines are great for doing demos of software. But when a demo requires a TCP/IP connection and a network isn't available, you must make adjustments. When performing a demo at a client site, for instance, the client likely won't allow you to access their wired or wireless networks. With no physical network available, the host's network adapter lacks a TCP/IP stack and it simply won't function, as this IPCONFIG shows:

C:\>ipconfig Windows IP Configuration Ethernet adapter Local Area Connection: Media State . . . . . . . . . . . : Media disconnected

Although public Wi-Fi hotspots and even some airplanes provide a network connection for a price, in many cases you don't need to pay for a connection to the Net. You just need a working TCP/IP stack to enable communication between your host and your virtual machine(s). Enter loopback adapters.

Loopback adapters, in both software and hardware, enable a disconnected machine to have a working TCP/IP stack. Software loopback adapters can provide special functionality when a network is not available and also when one is. Hardware loopback adapters, though often overlooked, offer convenience by offering loopback functionality without requiring you to reconfigure settings like a software loopback adapter does. A hardware adapter literally is plug and play. This article introduces both technologies and explains how and when to use them.

As a primer, here are definitions for the virtual machine terminology you will encounter in this article:

  • A host is the physical machine on which Virtual PC or Virtual Server (or similar products such as Zen, Parallels, and VMware) is installed.
  • A guest is a virtual machine running inside Virtual PC or Virtual Server.

Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date