Dear all,
We use TCP/IP for our Oracle networking to the database server but I see
2 formats for specifying the definition of a connection string of a
database in tnsnames.ora.

format 1:
testdb =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = testdb)
)
)
...