Data Packets -

Large amounts of data cant be transmitted at once, so its broken down into small units of data called packets.

Packet = Packet Header, Payload & Trailer

Packet Header -

1. Destination Address [IP Address of where data is being sent]
2. Packet Number [For correct sequencing]
3. Originators Address [For tracking of illegal activities, Resending data because of errors]

Payload -

1. The actual data being sent

Trailer -

1. Indication Marker [To show that this is the end of the packet]
2. Data for any error detection system

Packet Switching

Network - Computers and devices connected to each other via cables or wireless connections

Router - Device that examines and obtains a data pack, identifies its address and sends it to said address

DESCRIBE PACKET SWITCHING -

• broken down into packets - GIVEN SOURCE AND DESTINATION ADDRESS [1]
• gets packet number for rearrangement [1]