Questions'bout NAT. Plz kindly help. ^^

[SCC]

I've a few questions'bout NAT.

1stly, can NAT exists without a host pc?

2nd, NAT can prevent malicious activity from attacking the pc behind NAT. May I know why is this?

3rd, will the host pc get attacked by the malicious activity instead of the pc behind NAT, which is the initial target?

Hope u can kindly help to answer my questions. Thank u. ^^

[Erik]

NAT is mostly done through a router or firewall. So the whole idea is to have no computer connecting directly to the internet.

[SCC]

I see. How if I do? Bcoz in my case, I'm actually having a virtual pc in my pc which uses NAT networking to connect to my actual pc. Means that my pc is the host.

Wat'll be in this case?

[Erik]

Virtualization is a special case.

You need the host machine in order to have the virtual machine, so you do need the host in order for NAT to work. The function of NAT here is to share the single IP of your physical hardware with the possibly multiple virtual machines.