Transport Layer Security (TLS) is a cryptographic protocol that allows for secure communication over a network. PowerStore supports TLS 1.2 by default. PowerStore uses the TLS 1.2 protocol as both a server (for management traffic) and as a client (for example, when importing external data from older systems). TLS 1.1 is disabled by default on PowerStore and is not considered a secure protocol. For some operations, an earlier version of the TLS protocol may be required. For example, TLS 1.1 can be enabled on PowerStore to allow users to import data from older systems that do not support TLS 1.2. When TLS 1.1 is enabled, both TLS 1.1 and TLS 1.2 are supported and considered valid protocols.