3.2.1.3 Tables of Server Addresses

For each subnet, the client maintains a table of servers and their local addresses. Each row of the table represents a single server address and includes:

The UTC time of the address is updated whenever a Hello or Probe-Match from the server is processed successfully and contains this address. A higher-layer protocol SHOULD also update the time when the server is successfully contacted through content retrieval (BITS Peer-Caching: Content Retrieval Protocol).