Nt1310 Unit 1 Network Analysis

Satisfactory Essays
Low load in a Bit Map protocol is widely known due of its inefficiency. When a node is transmitting no other node is allowed to broadcast, they have to wait for the bit-map to finish and furthermore the bit-map is sent over and over again until each node acknowledges which one wants to transmit. Low numbered stations usually have to wait on average 1.5N slots consequently when the node is ready to send the current slot will be somewhere in the middle causing a lot of precious bandwidth to get wasted. High load in a bit map protocol on the other hand all nodes are transmitting at the same time so there is less delay and efficiency is increased because all nodes are alert of which node wants to transmit and such transmission can be done in…show more content…
The hidden station problem normally happens when nodes are unable to detect each other on the network because they are out of range. For instance if node A and C are not able to listen to each other but they want to communicate they start sending data packets simultaneously through B because there is no collision detection during transmission A and C keep sending data to B and this one gets corrupted. b. Exposed Station problem happens when a node is preventing other node to send packets because of node transmission proximity. Let’s put it this way; if we have 4 nodes A, B, C, D now B wants to transmit to A and C wants to transmit to D, not a problem and the transmission could be even simultaneously however if node B starts transmitting to A and node C listen to this transmission then stops transmitting to node D thinking that a collision will happen. 4. What 3 properties/features are added to MACAW which were not in MACA? a. Backoff Algorithm: RTS transmission is delay for a random number of slots; this enables better detection in network congestion. b. Multiple stream models: Uses FIFO (First in First out) packet queue at each station controlling transmission. c. ACK: Acknowledge of packet from receiver to sender, if ACK is lost RTS can generate a new one for that previous transmission, Also the signal provides and guaranties 3 way handshake between sender and
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