Given

d: distance between each pair of network devices

R: the link$$s transmission rate

a: average rate of arrival

L: packet length

s: propagation speed

t$1$: time to examine packet$$s header to determine forwarding action

t$2$: time to perform bit$-$level error check

Identify the types of delay in packet$-$switched networks. Choose all that apply.

Group of answer choices

Throughput delay $=$ La$/$R

Transmission delay $=$ L $/$ R

Processing delay $=$ t$1+$ t$2$

Queuing delay $($varies at each node$)$

Propagation delay $=$ d $/$ s

Propagation delay $=$ s $/$ d

Transmission delay $=$ R $/$ L

Traffic intensity delay $=$ a$/$ R