Multiplexing is where several independent data sources are combined to be sent along a single route to a specific destination e.g. your sky box receives all the channels using a single cable only because of multiplexing only.
Switching is the process of examining packets and routing data to a specific destination.
Source address
Destination address
Reassembly information
Sequence and acknowledgement numbers / tracking information
Data itself
Checksum / error handling
Protocol type
Header length
Flags
Payload size.
• Network collisions occur when two sets of data are detected on the network simultaneously
• The collision detection process involves monitoring the network to identify when a collision occurs
• Once detected, a computer waits for a short (random) time then sends again.