Analysis of Three connection modes of VMware Workstation Virtual Network

When I started to experiment with VMware Workstation, I often worried about the network connection mode.

Sometimes the teacher says to select Nat, sometimes it is recommended to bridge, and sometimes it is required to only host.

Alas, what does the teacher say.

If you don't understand it, you can follow the teacher's ass. You can do whatever the teacher asks us, and there is no room for your use.

Mechanical Engineers have followed the teacher to do so many experiments and have suffered so much. Have you ever wondered why we should choose different network connection modes to build an experimental environment, why are other deployments in our experiment correct, but various errors are caused by ignoring the small error in connection mode, why does the instructor keep saying that ping before the experiment is a foundation for your success?

With your own hands-on experience and responsibility, tell everyone that you didn't understand the three network connection modes.

The following describes the differences between the three connection modes with my own understanding.

In the edit vmware workstation interface, click-Virtual Network Editor

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Is a brief introduction to these three modes in VMware Workstation

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Only host mode (H) is used to connect to a virtual machine in a private network

Bridge Mode (B) directly connect a VM to an external network

Nat mode (n) shares the IP address of the host with the Virtual Machine

In fact, the brief introduction to VMware Workstation has summarized its essence. If you can understand it, I think these three statements are enough to let yourself understand the essential differences between the three.

However, I am a stupid person who may not be able to know the truth, so I have been confused by these three sentences or three models for a long time.

Every time I encounter a teacher, I have to ask this question. Many times I understand what the teacher has said. Then I want to think about it myself and then I will understand it. Who knows, I was confused again when I realized it ......

However, as I keep getting into trouble with my teachers, I gradually have some knowledge of these three models, I hope the level is much higher than that of me.

First, we will introduce the host-only mode (h)

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(This is a poor structure chart I drew using viso. The level is limited. Let's take a look .)

Only the host mode is characterized by the inability to communicate with the outside world, that is, it is an independent communication channel isolated from the outside world.

In this environment, you can do whatever you want, such as virus testing, completely isolated and secure.

Bridging Mode (B)

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The characteristic of the bridge mode is that its virtual network card is used as the actual physical network card to communicate with the outside world, and has no connection with the physical network card on its physical host. In others' opinion, the vmnet0 Nic actually exists and communicates directly with the outside world through a route. It can be understood that when you select the bridge mode, your virtual machine has been regarded as an existing machine by the outside world.

Therefore, the bridge mode can simulate the real environment. Such as SQL cluster experiment and failover. The bridge mode is not suitable for setting up DHCP and DNS servers, because it is easy to conflict with related servers within the company, resulting in unexpected problems, this problem may confuse extremely competent technicians.

Nat mode (N)

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The Nat Mode features that the virtual machine and the physical machine share a physical network card. The virtual machine in the same network segment needs to access the outside first through the virtual network card, then through the physical network card and then through the route to communicate with the outside world. When it uses vmnet8 to communicate with a physical network card, the physical network card tags it. It can be understood that the virtual machine package needs to carry the proof of the physical machine to the outside world. Then it communicates with the outside world in the same way as the physical machine and the outside world. When receiving information, it first transmits the packet to the physical Nic from the outside, and then sends the packet to the corresponding virtual machine through tags.

Here we will add an experiment to illustrate the communication between virtual machines and physical hosts in Nat mode. After the installation, VMWare will

Check whether the vmnet8 virtual Nic is installed on the physical host. This Nic is accessed by the physical host in vmnet8 Nat mode.

Vmnet8 subnet, that is, as long as the vmnet8 Nic is enabled on the physical host and the IP address is set correctly

Allows virtual machines to communicate with physical hosts.

The Nat mode is suitable for the experiment of building various servers. The Nat mode will keep your servers in conflict with external servers, and its functions are almost the same as those in practice, therefore, this model is suitable for testing some companies when building their internal network environments.

I have limited capabilities. I guess there will be many problems in writing this article. If you find it, please actively point it out and I will make a good change.

This article is for those who are still having a headache for the network connection mode. I hope you will get some benefits after reading this article.

This article is from the "Zhang Fan-it's fantasy drifting" blog, please be sure to keep this source http://chawan.blog.51cto.com/9179874/1544911

Analysis of Three connection modes of VMware Workstation Virtual Network