Category: Application layer

Network Time Protocol provides the service of time synchronisation for all devices on the network (which have NTP service available and configured).

NTP service usually listens on UDP port 123. It will most often distribute UTC (Coordinated Universal Time) along with well planed leap second modifications. But no other information like time zone can be forwarded with it. It means that your devices can get the clocks sync with NTP but you first need to be sure that you configured time-zone on that device so that he can show local time.

Today’s one of the most admired network service “E-mail” has been modernized the concept of how to communicate worldwide with simplicity and speed without spending extra money. However, to run this service on a computer system or any other end device, e-mail is needed some specific applications as well as services such as application layer protocol “Post Office Protocol” (POP).

RPC or a remote procedure call, in the computer world, is required for a communication session of the inner processes. That will also let the computer programs to search out subroutines or else procedures for execution using any other address spaces. But all this can be done without a programmer’s coding facilitation in order to perform the remote interaction. Anyhow, a programmer can write the same code for the both local and remote subroutine.

RTP (Real-time Transport Protocol)

Application layer protocol RTP is accessible in the TCP/IP protocol suite. Assigned port for this protocol is 5004 and it belongs to the working groups “AVT” and “FEC Framework”. As a standardized packets format, Real-time Transport Protocol (RTP) is used to deliver the audio or video or both on the IP networks. IETF standards association working group of Audio and Video Transport was built up it, at first.

Features of RTP are included end to end communication and data streams transmission in real time manners. But transfer of data to more than one destination is done with the IP multicast support in case of RTP. Moreover, RTP as a primary audio/video transport standard within the IP networks is used along with payload format and connected profile. Today, communication and entertainment systems with streaming media (telephony) are being used it extensively. And some common examples of such systems are such as teleconference applications and television services.

Protocol-messaging solution – SMPP – Short Message Peer-to-Peer

Telecommunication industry’s protocol “SMPP” is used to exchange messages (SMS) between the peer entities e.g. short messages offering services centers. This protocol is capable to submit messages in bulk by a third party such as news organization. Anyhow, the main function of short message peer-to-peer protocol is to switch over the SMS messages between two be aware of each other entities.