Provide your answers below each question All questions carry 2 points, except 8

Question

Provide your answers below each question
All questions carry 2 points, except 8 and 9.
1. Show how OC-1 achieves a data rate of 51.84 Mbps. How are the data rates of OC-1 and OC-9 related?
2. Consider a Bluetooth network with one master and 4 slaves. What is the total amount of time the master will have the opportunity to transmit to one of the slaves in 1 minute?
3. How does a Switch learn about the various hosts connected to it? What happens when a particular host is no longer active?
4. Why are redundant switches used? What problems might arise due to redundant switches? How is the problem solved?
5. With respect to Bluetooth, what is a Piconet? What is a Scatternet? Draw figures for both. And show all masters and slaves.
6. What is the difference between Packet Switching and Virtual Circuits?
7. What are some of the metrics used to measure network performance? Define each of them.
8. Consider that source A and destination B are connected via 4 links. The transmission rate of the links are 1 Mbps, 2 Mbps, 3 Mbps, and 4 Mbps. What is the maximum possible throughput between A and B? (1 point)
9. What is Classful addressing? What are the various classes? For each, mention how many bits are used for the network part and how many are used for the host part? How many networks and how many hosts can each of the class have? (3 points)
10. What happens to the delay when a network operates near its maximum capacity?
11. What are the drawbacks of Classful addressing? What is the remedy?
12. Consider the classless address: 167.199. 170.82/26. What is the first and last addresses of this subnet? Show all workings.
13. Suppose UCF has Class B address and wants to create about 1000 equal sized subnets. How big (how many hosts) can a subnet be? Show all workings.
14. How does DHCP work?
15. What are the main differences between DSL and Cable TV networks?

Explanation / Answer

Solution:

Note: The first question is done as per Chegg guidelines, please repost others.

OC-1 is optical carrier 1 base level model to transmit information one node to another node. The Data Rate of OC1 is designed with reference to SONET STS-1 frame, which consists of 90 columns and 9 rows

Using Nyquist criteri

The bandwidth of the human vice is 4KHz

twice the highest frequency is the sample = 2 x 4 kHz = 8 KHz

256 levels of PCM coding means 2^8= 256 which implies 8 bits per sample x 8000 samples/sec = 64 Kbps

The data rate at OC-1 = 90 columns x 9 rows x data rate of human voice = 90x9x64 kbps = 51.84 Mbps.

Data rate of OC-9 is 9 times of data rate of OC-1 = 9 x 51.84 Mbps = 466.56 Mbps

The total amount of data transferred is 1 min for a Bluetooth network = 60 x 2.11 Mb  

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