Hi

I was asked this in a interview could anybody expalin whats happening here

TNS Ping Utility for Solaris: Version 8.1.7.0.0 - Production on 24-APR-2001 12:24:21

(c) Copyright 1997 Oracle Corporation. All rights reserved.

Attempting to contact
(ADDRESS=(PROTOCOL=TCP)(HOST=10.1.2.3)(PORT=1521))
OK (1 msec)

testuser@test-01 /data/testuser
337 $ sqlplus devuser_owner/dev@TEST01

SQL*Plus: Release 8.1.7.0.0 - Production on Tue Apr 24 12:24:38 2001

(c) Copyright 2000 Oracle Corporation. All rights reserved.

ERROR:
ORA-12545: Connect failed because target host or object does not
exist

regards
Hrishy