LOSS
Data loss occurs when queue is full or cache memory of router is full
DELAY
Due to 4 reasons we have delays
- Transmission delay -> (packet length)/(link transmission rate)
- Propogation delay -> (length of physical link)/(propogation speed)
- Queue delay -> Time when packet waits in queue
- Nodal processing delay -> Time for detecting errors in packets
THROUGHPUT
Rate at which data is sent from sender to reciever