rest standards security protocols http content-encoding semantics authentication urls caching

uniform resource locators standards http urls relative urls

client-server session url retrieval url information retrieval standards track urls z39.50 protocol

client-server application protocol request-response media types http standards track authentication urls caching rfc 2068

resolution resource security urns naptr network management urls quality of service dns metadata

mailing lists list-owner email list-unsubscribe list-help meta-syntax list-post standards track list-subscribe urls

email mime standards protocols urls

networking performance standards inet standards security protocols dhcp authentication urls uap

fax modem standards track telephone calls urls

ietf urns uris urls w3c

email security domain-names internationalization urls