Diff between Logshipping , Transaction Log backup & Transaction Replication

Can any one explain in detail difference betwen Logshipping , Transaction Log backup & Transaction Replication and which is
better over other on what circumstances?By all means you can get more explanation with code examples from books online for these topics.sql

Did not clear up transaction log after backup?

I performed a complete database backup using the backup wizard and checked
"Remove inactive entries from transaction log". After the backup was
completed, I discovered that the size of the transaction log did not go down.
How can I clear the transaction log?
Hi
BACKUP LOG file and the DBCC SHRINKFILE command ( for more details please
refer to BOL)
"joeau" <joeau@.discussions.microsoft.com> wrote in message
news:B0DF5822-6FCE-411B-8603-BD0F64E13DAD@.microsoft.com...
> I performed a complete database backup using the backup wizard and checked
> "Remove inactive entries from transaction log". After the backup was
> completed, I discovered that the size of the transaction log did not go
down.
> How can I clear the transaction log?

Did not clear up transaction log after backup?

I performed a complete database backup using the backup wizard and checked
"Remove inactive entries from transaction log". After the backup was
completed, I discovered that the size of the transaction log did not go down
.
How can I clear the transaction log?Hi
BACKUP LOG file and the DBCC SHRINKFILE command ( for more details please
refer to BOL)
"joeau" <joeau@.discussions.microsoft.com> wrote in message
news:B0DF5822-6FCE-411B-8603-BD0F64E13DAD@.microsoft.com...
> I performed a complete database backup using the backup wizard and checked
> "Remove inactive entries from transaction log". After the backup was
> completed, I discovered that the size of the transaction log did not go
down.
> How can I clear the transaction log?

Did not clear up transaction log after backup?

I performed a complete database backup using the backup wizard and checked
"Remove inactive entries from transaction log". After the backup was
completed, I discovered that the size of the transaction log did not go down.
How can I clear the transaction log?Hi
BACKUP LOG file and the DBCC SHRINKFILE command ( for more details please
refer to BOL)
"joeau" <joeau@.discussions.microsoft.com> wrote in message
news:B0DF5822-6FCE-411B-8603-BD0F64E13DAD@.microsoft.com...
> I performed a complete database backup using the backup wizard and checked
> "Remove inactive entries from transaction log". After the backup was
> completed, I discovered that the size of the transaction log did not go
down.
> How can I clear the transaction log?