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Cornell University

Glossary of Network Registry Terms Used at Cornell

This article applies to: DNS

DHCP (Dynamic Host Configuration Protocol) An Internet protocol used to automatically assign IP addresses and to deliver information such as router and printer addresses.

DNS (Domain Name System) The service that translates IP addresses (such as into domain and host names (such as

DNSDB Cornell's database of domains, subnets, and hosts recorded in a central registry.

Information Technology Device Any device involved with the processing, storage, or forwarding of information making use of the Cornell information technology infrastructure or attached to the Cornell network. These devices include, but are not limited to, laptop computers, desktop computers, servers, and network devices such as routers or switches, and printers.

IP (Internet Protocol) Address A unique number associated with a device used for the routing of traffic across the Internet or another network.

MAC (Media Access Control) Address A unique number assigned to the hardware within a device used for mapping its IP address.

NetID A unique identifier assigned to each person associated with Cornell. The NetID, with its associated password, is used to authenticate users of campus network services.

Network Registry A record of all devices connected to the Cornell University network, maintained through a centralized, continually updated database.

Subnet A contiguous section of the university's distributed network that uses a common IP address.

10 (campus-routed) Address An IP address set up by a network administrator to allow only on-campus network traffic to and from a device.

0 (non-routed) Address An IP address that is used only for the purposes of network registry and does not allow routing of any traffic at all.


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