standby database questions

hi, guys:

   We use oracle 8.1.7, we have built a standby DB on remote host in "managed mode", it
will automaticly apply the primary database's redo log, but I have some questions:

1. The primary db will hang, if the network between primary and standby machine has the problem. if this is true how can we overcome this?
2. after I alter standby database into "managed" mode,why the SQL prompt hanging there forever to wait primary db's redologs come? should I prevent this happenning?
3. how can I do, if I have more than one db_file or log_file names to convert?

     for example:    primary                              standby
           db file1:    /oracle/data/xyz.dbf           /oracle/misc/xyz.dbf
            db file2: /export/data/abc.dbf           /oraclee/data/abc.dbf

   Thanks.

                                            Tao