Routing Implied by Transport Layer
Connection Oriented (provided by TCP)
- Setting up a virtual circuit (a TCP connection)
- TCP asks IP to route all packets in a message by using the same path (from source to destination)
- Packet deliveries are acknowledged
- Used by HTTP, SMTP, FTP
Connectionless Routing (provided by UDP
- Sending packets individually without a virtual circuit
- Each packet is sent independently of one another (routed separately and can follow different routes and arrive at different times)
QoS Routing (provided by RTP)
- A special kind connection oriented routing with priorities