.csnet
Encyclopedia
.csnet is a hostname suffix that was used for identifying nodes in the Computer Science Network (CSNET
) not directly connected to the Internet
but reachable through special gateway systems. It was never installed as a top-level domain
in the Domain Name System
, but parsed in the message routing logic of mail transport agents (MTA).
CSNET
The Computer Science Network was a computer network that began operation in 1981 in the United States. Its purpose was to extend networking benefits, for computer science departments at academic and research institutions that could not be directly connected to ARPANET, due to funding or...
) not directly connected to the Internet
Internet
The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite to serve billions of users worldwide...
but reachable through special gateway systems. It was never installed as a top-level domain
Top-level domain
A top-level domain is one of the domains at the highest level in the hierarchical Domain Name System of the Internet. The top-level domain names are installed in the root zone of the name space. For all domains in lower levels, it is the last part of the domain name, that is, the last label of a...
in the Domain Name System
Domain name system
The Domain Name System is a hierarchical distributed naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities...
, but parsed in the message routing logic of mail transport agents (MTA).