Connection-Oriented means that when devices communicate, they perform handshaking to set up an end-to-end connection. Connection-Oriented systems can only work in bi-directional communications environments.
Connection-less means that no effort is made to set up a dedicated end-to-end connection. Walkie-talkies, or Citizens Band radios are a good examples of connection-less communication.
DHCP is a connectionless protocols. In general, any protocol that is based on TCP port alone is a connection-oriented protocol while any protocol that is based on UDP port alone is a connectionless protocol. And a protocols that can work on both TCP and UDP port can be either a connection-oriented or a connectionless protocol depending upon the which protocol is used (TCP or UDP). For checking other protocols if they are connection-oriented or connectionless check http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
The communication between two brains is connectionless. - Syam
If FTP did not have TCP working with it, it could be considered connectionless. TCP is connection oriented and it verifies the FTP transfers have been received. Therefore it is considered Connection Oriented. If FTP used UDP it would be considered connectionless as UDP just sends the data and never checks to see if it all made it to the recipient -
flow control low overhead connectionless connection-oriented sequence and acknowledgements
ACK
DHCP is a connectionless protocols. In general, any protocol that is based on TCP port alone is a connection-oriented protocol while any protocol that is based on UDP port alone is a connectionless protocol. And a protocols that can work on both TCP and UDP port can be either a connection-oriented or a connectionless protocol depending upon the which protocol is used (TCP or UDP). For checking other protocols if they are connection-oriented or connectionless check http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
The communication between two brains is connectionless. - Syam
They can be both. E.g. MPLS-TP or Connection-Oriented-Ethernet (COE) are connection oriented.
Different from a connectionless protocol, a connection-oriented protocol guaranties the delivery of the information. An example of connection-oriented protocol is (TCP) and a connectionless protocol is (UDP). TCP is a connection-oriented protocol, it makes a connection and checks whether the data is received, and resends if it is not. UDP is a connectionless protocol, it does not guarantee delivery by first connecting and checking whether data is received.
If FTP did not have TCP working with it, it could be considered connectionless. TCP is connection oriented and it verifies the FTP transfers have been received. Therefore it is considered Connection Oriented. If FTP used UDP it would be considered connectionless as UDP just sends the data and never checks to see if it all made it to the recipient -
Different from a connectionless protocol, a connection-oriented protocol guaranties the delivery of the information. An example of connection-oriented protocol is (TCP) and a connectionless protocol is (UDP). page/926 A+
I would say it is connectionless, as it sends the message to the person to revive it without establishing the connection first so there's no way to know if they revived it.
flow control low overhead connectionless connection-oriented sequence and acknowledgements
Email runs SMTP (simple mail transfer protocol), where SMTP operates over TCP protocol, so it id connection oriented.
ACK
an upper-layer, connection-oriented protocol or service
TCP has an acknowledgement technique of checking if data packet is received either at the client or at the server end, this is what makes it a connection oriented network service.whileUDP does not guarantee reliability of ordering or acknowledgement the way TCP does. Datagrams may appear out of order, missing or appear duplicated. This is what makes it a connectionless oriented network service.