Delay , Loss & Throughput

DELAY
PACKET LOSS
THROUGHPUT
Presented by:
Kartik H. Chauhan

DELAY:
It is the time taken to transfer the entire
message from sender to receiver.

Total delay can calculated by four components.
I. Processing delay
II. Queuing delay
III. Transmission delay
IV. Propagation delay

Processing delay:
Time requires by intermediate device or end device to process
the message before for forwarding.
Processing delay is the time it takes routers to process the
packet header.

Queuing delay:
Time requires by intermediate device or end device to hold the
message before starting of processing.
Router can process message one by one ,so newly arrived
message would be in a queue.

Transmission delay:
Message does not means single bit in network.
message consist thousands of bits.
So sending message means transmitting all thousands
bits of that message.

Propagation delay:
Time required for a bit to travel from the source to destination.
The propagation delay is calculated by dividing the distance by
the propagation speed.

Packet loss:
In networking intermediate device like router are having fix
queue size.
If queue is full, at a time router will drop the packet.
It is known as packet loss.

Bandwidth:
Bandwidth is defined as the amount of data that can be
transmitted in a fixed amount of time.
 For digital devices, the bandwidth is usually expressed in
bits per second(bps) or bytes per second.
 For analog devices, the bandwidth is expressed in cycles
per second, or Hertz (Hz).

•Difference Between
Bandwidth and Throughput:

Throughput:
Through put is a measure of how fast we can actually send data
through a network.
Throughput is actual measurement of how fast data can be send.
Throughput is usually measured in bits per second and some
time in data packets per second or data packets per time slot.

Delay , Loss & Throughput

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