Cisco TelePresence Administrator's Manual page 316

Maintenance
TTL The length of time (in seconds) that the results of this query will be cached by the VCS.
Class IN (internet) indicates that the response was a DNS record involving an internet hostname, server or
IP address.
Type The record type contained in the response to the query.
Response The content of the record received in response to the query for this Name and Type.
Cisco VCS Administrator Guide (X8.1.1)
Network utilities
Page 316 of 507