

In episode 2, Yamane Yukihiro explains that the network on the island is
completely isolated, a protected network.

[![Picture from episode 2: Then how does the lab's network
function?](https://i.stack.imgur.com/VDiwQm.jpg)](https://i.stack.imgur.com/VDiwQ.jpg)[![Picture
from Episode 2: It's completely isolated form the outside
world](https://i.stack.imgur.com/6lAdYm.jpg)](https://i.stack.imgur.com/6lAdY.jpg)

If that is the case, why are they surprised when they cannot send e-mails or
communicate with the outside world when the system goes down later in episode
3?

[![Episode 3: lab's network has been cut
off](https://i.stack.imgur.com/3Nzhx.jpg)](https://i.stack.imgur.com/3Nzhx.jpg)


CC BY-SA 3.0
2016-02-21T19:46:23.773
29943
2016-04-06T10:56:24.023
17758
question
subete-ga-f-ni-naru
Why were they surprised they couldn't send e-mails when the network was closed off in the first place?


A network **doesn't have to be public**. **Network** is just a bunch of
computers that are able to share their content between each other.

So they weren't able to communicate within their network nor with the outside
world.

They probably could communicate to the outside world **before** through a
proxy server that is within their control only.

[![](https://i.stack.imgur.com/OzShl.png)](https://i.stack.imgur.com/OzShl.png)

Image and further explanation on
[wikipedia](https://en.wikipedia.org/wiki/Proxy_server#Bypassing_filters_and_censorship)


CC BY-SA 3.0
2016-04-06T10:56:24.023
31209
2016-04-06T10:56:24.023
22447
29943
answer