user: What is the capital city of the United States?

assistant: Washington DC is the capital city of the United States

user: Describe the video game crash of 1983 in 2 sentences.

assistant: Home video game revenues in North America declined from $3.2 billion in 1983 to around $100 million in 1985. This decline – which preceded the success of the Nintendo Entertainment System – is referred to as the video game crash of 1983.

user: Give me an example of a screened subnet

assistant: In network security a screened subnet refers to the use of one or more logical screening routers as a firewall to define three separate subnets: an external router (sometimes called an access router), that separates the external network from a perimeter network, and an internal router (sometimes called a choke router) that separates the perimeter network from the internal network. The perimeter network, also called a border network or demilitarized zone (DMZ), is intended for hosting servers (sometimes called bastion hosts) that are accessible from or have access to both the internal and external networks. The purpose of a screened subnet or DMZ is to establish a network with heightened security that is situated between an external and presumed hostile network, such as the Internet or an extranet, and an internal network.

A screened subnet is an essential concept for e-commerce or any entity that has a presence in the World Wide Web or is using electronic payment systems or other network services because of the prevalence of hackers, advanced persistent threats, computer worms, botnets, and other threats to networked information systems.