Tcp is a transport layer protocol. It is said to be connection oriented because it requires a handshake or established connection between the sender and the receiver.
Once a handshake is made, the segments of the packets are sent across and the connection is closed.
The error detection does not only carry out integrity checks, but allows for sequence numbering from the sender to receiver. If the packets arrives out of order, the sequence numbers are used to arrange them in the correct order.
