Question
Download Solution PDFIn a network, If P is the only packet being transmitted and there was no earlier transmission, which of the following delays could be zero ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF
Correct Answer: Option 2) Queuing delay
Key Points:
Type of Delay | Description | Can It Be Zero? |
---|---|---|
Propagation Delay | Time taken for the signal to travel from sender to receiver, depends on distance and medium. | No — Even with one packet, propagation through medium takes time. |
Queuing Delay | Time a packet waits in queue before transmission. | Yes — Since there’s no congestion or prior packet, the packet does not wait in queue. |
Transmission Delay | Time to push the packet’s bits onto the wire, depends on packet size and bandwidth. | No — Even a single packet requires transmission time. |
Processing Delay | Time required for routers/switches to examine the packet and make forwarding decisions. | No — Some processing is always required. |
Additional Information:
- Queuing delay can be zero when the network is idle or lightly loaded, as there is no waiting for the packet to be forwarded.
- Propagation, Transmission, and Processing delays are dependent on physical, hardware, and logical operations, and are rarely zero.
Conclusion: In a no-congestion environment with only one packet (P), only queuing delay can be considered zero.
Last updated on Jul 3, 2025
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