Perhaps you are referring to a packet? A packet contains information about where it is going, as well as the data itself, and usually some sort of error-checking code.
b. Payload that's what the data in a packet is called. The other parts are "header" and "trailer" depending on if they are at the beginning or end of the packet
Arbitration field
A data packet is split into three parts: The header, the payload and the trailer.The header contains the basic instructions about the data packet which should include:The packet lengthSynchronization (a few check bits to match up to the network)Originating IP Address (i.e. PC 1)Destination IP Address (i.e. PC 2)ProtocolPacket numberThe payload is the main body of data that is being sent. The size of the data can be a fixed length or a variable amount. If it is a fixed length, then this can be padded with blank data, so that each packet remains the same size.The trailer or footer contains data that tells the destination computer that it has reached the end of the packet. The trailer may also contain error checking information. This will tell the receiving computer to tell the originating source that the information was received.
Data, Segment, packet, frame, bit in that order
Yes. Encapsulated data that moves through a packet is referred to as a segment. A packet is a bundle of information sent across a network in a structured fashion.
Packet data means internet data service pack.
Overhead. The packet header contains no useful data - at least, not useful for the end-user; it is of course very important to maintain the protocol functioning, for instance, the destination address is necessary in order to be able to send the packet to the correct destination.
a recipient's address, reassembling instructions, and data
how to activate packet data
Transport
how to deal with packet data errors