Answer the following questions in your own words , in no more than 4 sentences each.
QUES- Discuss the case when the load is low or high in a Bit Map Protocol. What will be the wait slot for a low numbered station and high numbered station?
ANS - Under conditions of low load, the bit map will simply be repeated over and over, for lack of data frames.
Low Numbered Stations - when it becomes ready to send, the 'current' slot will be somewhere in the middle of the bit map.
On Average, the station will have to wait N/2 slots for the current scan to finish and another full N slot for the following scan run to completion before it may begin transmitting. Therefore, on an average they have to wait for 1.5N slots.
High Numbered Stations - They …show more content…
ANS - As the load increases, overhead increases. Where as in Collision free protocols, as the load increases their overhead decreases.
Under conditions of light load, contention protocols are preferable due to its less delay. As the load increases, overhead increases.
QUES - What do you understand by The Hidden Station Problem and The Exposed Station Problem?
ANS - Hidden Station Problem: The problem of a station not being able to detect a potential competitor for the medium because the competitor is too far away is called the hidden station problem. Quote an example
The Exposed Station Problem: The exposed node problem occurs when a node is prevented from sending packets to other nodes due to a neighbouring transmitter. Quote an example.
QUES - What 3 properties/features are added to MACAW which were not there in MACA?
ANS -
1. Since without DLL acknowledgements, the lost frames were not retransmitted until the transport layer noticed their absence later. Therefore, Acknowledgement (ACK) frame introduced.
2. CSMA was added to keep a station transmitting an RTS at the same time another station is also doing so to the
QUES- Discuss the case when the load is low or high in a Bit Map Protocol. What will be the wait slot for a low numbered station and high numbered station?
ANS - Under conditions of low load, the bit map will simply be repeated over and over, for lack of data frames.
Low Numbered Stations - when it becomes ready to send, the 'current' slot will be somewhere in the middle of the bit map.
On Average, the station will have to wait N/2 slots for the current scan to finish and another full N slot for the following scan run to completion before it may begin transmitting. Therefore, on an average they have to wait for 1.5N slots.
High Numbered Stations - They …show more content…
ANS - As the load increases, overhead increases. Where as in Collision free protocols, as the load increases their overhead decreases.
Under conditions of light load, contention protocols are preferable due to its less delay. As the load increases, overhead increases.
QUES - What do you understand by The Hidden Station Problem and The Exposed Station Problem?
ANS - Hidden Station Problem: The problem of a station not being able to detect a potential competitor for the medium because the competitor is too far away is called the hidden station problem. Quote an example
The Exposed Station Problem: The exposed node problem occurs when a node is prevented from sending packets to other nodes due to a neighbouring transmitter. Quote an example.
QUES - What 3 properties/features are added to MACAW which were not there in MACA?
ANS -
1. Since without DLL acknowledgements, the lost frames were not retransmitted until the transport layer noticed their absence later. Therefore, Acknowledgement (ACK) frame introduced.
2. CSMA was added to keep a station transmitting an RTS at the same time another station is also doing so to the