2.5 quintillion bytes of data are produced by humans every day in 2021 and is expected too rise
Before data can be sent across the internet, the TCP is used to break it into fixed-size chunks. These are known as datagrams, but are sometimes called packets.
A packet consists of control information and user data; the latter is also known as the payload. Control information provides data for delivering the payload (e.g., source and destination network addresses, error detection codes, or sequencing information).
packet loss occurs when one or more packets of data travelling across a computer network fail to reach their destination. Packet loss is either caused by errors in data transmission, typically across wireless networks, or network congestion.
in the Internet architecture the network layer is responsible for routing packets through the packet-switched network from the source to the destination. The transport layer is responsible for end-to-end communication, from an application running on the sending host to its peer running on the destination host.
if the router is busy or broken packet loss is occurring / has occurred