Glossary

Z

11 terms.

Z39.50

An international library search protocol standard for searching and retrieving information from remote databases. WAIS was based on Z39.50-1988.

Plain language An international library search protocol standard for searching and retrieving information from remote databases.

Used in RFC 1625 RFC 1729 RFC 4156

Zero Touch Provisioning

Automatic discovery and configuration of network nodes without manual setup. In RIFT, nodes automatically determine their level and peers based on protocol messages alone.

Plain language Automatic discovery and configuration of network nodes without manual setup.

Used in RFC 8572 RFC 9696

Zero-Knowledge Proof

A cryptographic proof that convinces a verifier that a statement is true without revealing any information beyond that fact. The prover can demonstrate knowledge of a secret without disclosing the secret itself.

Plain language A cryptographic proof convincing a verifier a statement is true without revealing the secret.

Used in RFC 8235 RFC 9490 RFC 9497 RFC 9576

Zone

A portion of the DNS namespace managed as a unit by one authority, such as example.com, possibly with delegations to child zones.

Plain language A portion of the DNS namespace managed as a unit by one authority, possibly with delegations to child zones.

Used in RFC 883 RFC 920 RFC 973 RFC 1033 RFC 1279 RFC 1706 RFC 1816 RFC 1982 RFC 1995 RFC 1996 RFC 2010 RFC 2136 RFC 2137 RFC 2163 RFC 2182 RFC 2317 RFC 2672 RFC 2782 RFC 2870 RFC 2916 RFC 3007 RFC 3008 RFC 3026 RFC 3152 and 58 more

Zone

A part of the domain name space that is administered as a unit and served by its own authoritative name servers. A zone can delegate subdomains to other zones.

Plain language A part of the domain name space administered as a unit by its own authoritative name servers.

Used in RFC 882 RFC 883 RFC 1031 RFC 1032 RFC 1034 RFC 1035 RFC 1183 RFC 1296 RFC 1480 RFC 1611 RFC 1713 RFC 1794 RFC 1912 RFC 2010 RFC 2065 RFC 2517 RFC 2535 RFC 3008 RFC 3090 RFC 3375 RFC 3403 RFC 3833 RFC 4472 RFC 4592 and 10 more

Zone cut

The point in the DNS tree where authority passes from a parent zone to a child zone, marked by NS records in the parent. DNSSEC lets NSEC and DS records sit on the parent side of it.

Plain language The point in the DNS tree where authority passes from a parent zone to a child zone.

Used in RFC 2136 RFC 2181 RFC 3658 RFC 4035 RFC 4592 RFC 4956 RFC 5936 RFC 6672 RFC 6840 RFC 7477 RFC 8020 RFC 8499 RFC 9156 RFC 9471 RFC 9499 RFC 9615 RFC 9704 RFC 9803 RFC 10029

Zone identifier

A text label, usually an interface name such as eth0, that says which network link a scoped IPv6 address belongs to. It is meaningful only on the node where it is defined.

Plain language A text label indicating which network link a scoped IPv6 address belongs to.

Used in RFC 6874 RFC 9844

Zone index

A number that selects an interface when the same scoped Internet address can appear in more than one zone on a device that connects several zones.

Plain language A number selecting an interface when the same scoped address appears in multiple zones.

Used in RFC 3419 RFC 4007

Zone signing key (ZSK)

A key whose private half signs the zone's data. It is usually in the same DNSKEY RRset as the KSK and may be changed more often.

Plain language A key whose private half signs the zone's data.

Used in RFC 2137 RFC 3757 RFC 4033 RFC 5702 RFC 6781 RFC 6841 RFC 7344 RFC 7583 RFC 8078 RFC 8483 RFC 8499 RFC 8901

Zone transfer

Copying a whole zone from a name server that holds it to another name server, so the second can answer authoritatively for it.

Plain language Copying a whole zone from one name server to another so both can answer authoritatively.

Used in RFC 883 RFC 1031 RFC 1296 RFC 1794 RFC 1996 RFC 9103 RFC 9526

ZRTP

A key agreement protocol that performs a Diffie-Hellman exchange in the media path, on the same port as RTP, to produce keys for an SRTP session without relying on a PKI.

Used in RFC 6189 RFC 7983