ISO/IEC 16317:2011 specifies maintenance of network connectivity and presence by proxies to extend the sleep duration of hosts.

ISO/IEC 16317:2011 specifies:

• capabilities that a proxy may expose to a host;
• information that must be exchanged between a host and a proxy;
• proxy behaviour for 802.3 (Ethernet) and 802.11 (WiFi);
• required and optional behaviour of a proxy while it is operating, including responding to packets, generating packets, ignoring packets, and waking the host.

ISO/IEC 16317:2011 does not:

• specify communication mechanisms between hosts and proxies;
• extend or modify the referenced specifications (and for any discrepancies those specifications are authoritative);
• support security and communication protocols such as IPsec, MACSec, SSL, TLS, Mobile IP, etc.