The Arduino initializes the Ethernet Module and shows a link or not. It then tries to get a DHCP address (if none defaults to stored IP and warns you). Then it connects to Google DNS at 188.8.131.52 and looks up our friendly neighborhood time server "0.pool.ntp.org" (if it can't find it it warns you). Finally it makes a web connection to "www.google.com" (if it can't it warns). So all green lights mean that we got an IP and we can see then internet!
SunFounder ENC28J60 Ethernet LAN Network Module For Arduino SPI AVR PIC LPC STM32