TP4 provides reliable transport service and functions with either connection-oriented or connectionless network service. TP4 is the most commonly used of all the OSI transport protocols and is similar to the Transmission Control Protocol (TCP) in the Internet protocol suite .
TP4 is an example that provides message-oriented service. Whereas: TP4 service is CO and TP4 service is reliable, The original definitions of TP0 and TP4 support QoS service, however, only recently have the lower layers of networks matured sufficiently for the community to consider transport layer QoS handling.
Dave Priest, meanwhile, was less enthused about the TP04 in his write-up on air purifiers, and questioned whether it was really any better than top-performing air purifiers that cost hundreds less (third-party testing suggests that it isn't). Now, the two of us are teaming up to come to a consensus on the TP04. In a way, we're both right.
Tender Package TP4, Urban Tunnels, is a design and build contract that covers the majority of civil works associated with the construction of the new railway line for the Urban Section of the Copenhagen to Ringsted Rail Line development.