About: http://webisa.webdatacommons.org/312997683

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The J2SE 5 implementation hence tries to open a TCP socket on port 7 (the echo service) and hopes to get some sort of reply.Linux/Unix, instead, supports an ICMP ping system call.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com