Reference: https://l.facebook.com/l.php?u=http%3A%2F%2Fwww.cisco.com%2Fen%2FUS%2Fdocs% 2Finternetworking%2Ftroubleshooting%2Fguide%2Ftr1907.html% 23wp1021264&h=ATMT6hWMWKar6G3cbMd8vYoG64obKG4CIuxXlmCWtCLencP9vUG0hrC3C0azv18a RsmIsdrKko8ew_O6UkUwYCVqgYvxTz3TFquXNKyrnrAa1arE1V4HBFjg4_E2gJSawoz2_g Ping the destination by name perform a DNS lookup on the destination