1, Consider a slotted ring of length 2 km with a data rate of 100 Mbps and 100 r
ID: 657812 • Letter: 1
Question
1, Consider a slotted ring of length 2 km with a data rate of 100 Mbps and 100 repeaters, each of which introduces a 1-bit delay. Each slot contains room for one source address byte, one destination address byte, two data bytes, and five control bits for a total length of 37 bits. How many slots are on the ring? (Assume a propagation speed of 2 x 10^8 m/s).
2. Imagine a LAN with a bus topology in which each station is given permission to send a fixed-size frame. However, other stations are not allowed to send data until this frame reaches the destination. What is the efficiency of this LAN?
Assume:
Medium length = 5,000 m
Capacity = 100 Mbps
Propagation speed = 200,000,000 m/s
Frame length = 500 bits
3. Numerically Calculate the efficiency of a typical CSMA/CD using the following information:
Medium length = 10,000 m
Capacity = 10 Mbps
Propagation speed = 200,000,000 m/s
Frame length = 256 bits
4. Calculate (Numerically) the efficiency of a Token Ring network using the following information:
Medium length = 5,000 m
Number of stations: 50
Capacity = 16 Mbps
Propagation speed = 200,000,000 m/s
Frame length = 4000 bits
Explanation / Answer
1. Two Slots.
2. Efficiency is 100mbps.
3.
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