Terms and definitions in messaging

Multichannel messaging service is based on a variety of telecommunication and Internet technologies. In the description of services, we often use abbreviations that may not always be known to you. Here we have compiled a glossary of terms and definitions used in the industry.

Header

Information added by the protocol in front of the payload in the packet for its own use (addresses, packet type, sequence number, CRC...). Each protocol adds a different header, so in a typical TCP/IP packet as transmitted, we have a MAC header, an IP header and a TCP header, followed by the payload.