This read-write RlTacacsConnectionType chooses whether the switch keeps a single persistent TCP connection open to this TACACS+ server (rlTacacsSingleConnection) or opens and closes a new connection for every authentication session (rlTacacsPerSessionConnection). An admin cares because a persistent connection reduces authentication latency under heavy login traffic but ties up a server-side socket continuously, while per-session connections use fewer idle resources at the cost of extra connection setup time per login. For example, an admin on a switch handling frequent 802.1x re-authentications might choose the single persistent connection mode to avoid repeated TCP handshake delays.