What is a TCP/IP Packet?
A packet means a basic unit of information in network transmission. Most networks use TCP/IP as network protocol. TCP/IP requires the information split into packets that contains both a segment of data to be transferred and an address where data to be sent to.
TCP/IP is a packet-switching technology which has better advantage in term of sending data to a destination the decentralized way and less vulnerable to equipment failure, if compared to circuit-switching technology like telephone network.
Every packet consists of two major pieces: the packet header and the data. Packet header consists of the version of protocol being used (IPv4 or IPv6), the length of the packet, the number of packets used to send the total data, the source address, the destination address, a checksum, and the TTL (Time To Live) data. The data is divided into segment of length which varies in a range of 0 to 64 KB.