4.5 Connect VM to the network

✅ Bridge Networking

Each VM has its own IP address
and the VM’s IP address is different from the host

• 👍🏻 each machine has its own traffic

• RJ45 + ethernet wire(if wired) or wireless connection belong to the RM
• the bandwidth is shared by the RM and the VM

⭐️ bandwidth: how many bits travel per second of that connection
mega bits per second

• 4 IPs, 4 traffic
• but only one wire,
• so all traffic share the bandwidth

• distributed by percentage %

• ❓ What if one machine goes very slow?
• 💊 you can resize the bandwidth distribution

✅ NAT mode

Network Access Translation

• Only 1 IP for all RM and VM
• for the VM to access internet, has to go through RM
• the traffic is signed by the host
• so the RM will check the VM access to the internet

• the RM will control the connectivity

• 👍🏻 security
• 👍🏻 No connectivity problems, and RM will control all

• 👎🏻 If I want to do hacking with VM, I cannot as RM will know my IP

• ⭐️ NATed: there is only one IP, and it is used by all virtual machines

✅ Internal Network

• RM: connected to Internet, with its own IP
• can connect to Internet

• Anfitrion: RM

• VM: some VMs create an internal, isolated network
• Invitado: one virtual machine, acting as a boss for the internal VMs

• all VMs are connected to the boss VM, invitado

• It is similar to creating a VPN(Virtual Private Network) with VMs
• 🛠️ Used for company intranet

✅ Host Mode

• VM is connected to the RM
• but connection to internet is lost
• nobody has connection to the internet
• only connection between VM and RM
• 🛠️ Designing a secret project
• so that spies cannot look at me!

✅ No connectivity

• nobody has connection to the internet
• no connectivity between VM and RM
• 🛠️ Used for VMs that spy on your computer, without being noticed by the RM
• 🛠️ Virtual malware