(a). Illustrate the Medium access control (MAC) protocol for wireless local area networks (LANS) using appropriate diagrams. Mention in brief network allocation vector. Consider an analog signal that has a bit rate of 8000 bps and a baud rate of 4000 baud. How many data elements are carried by each signal element?

(a). Illustrate the Medium access control (MAC) protocol for wireless local area networks (LANS) using appropriate diagrams. Mention in brief network allocation vector. Consider an analog signal that has a bit rate of 8000 bps and a baud rate of 4000 baud. How many data elements are carried by each signal element?

Operations Research : Applications and Algorithms

4th Edition

ISBN:9780534380588

Author:Wayne L. Winston

Publisher:Wayne L. Winston

Chapter20: Queuing Theory

Section20.10: Exponential Queues In Series And Open Queuing Networks

Problem 8P

See similar textbooks

Similar questions

Computer Science Consider two hosts C & D connected by a point-to-point link with a data link rate of 10 Gb/s. The hosts are 2 km apart and the signal propagation speed is 2 × 108 m/s. Given the packet size is 500 bytes, how many packets can be in inflight from C to D?
. Consider a channel with spectrum between 4 MHz and 6 MHz and SNRdB = 20. UsingShannon’s formula, what is the maximum capacity of the channel? . What are the major functions of the transport layer and the internet layer in TCP/IP protocol?Mention 2 functions of each layer. . Consider two signals F1(t) and F2(t) with periods 2 microseconds and 3 microsecondsrespectively. What is the frequency of the signal F(t) = F1(t) + F2(t).
5. Suppose the distance between two ends of an Ethernet LAN with a transmission rate of R bps is d meters. Can you derive a formula to find the minimum frame size, L, needed for an Ethernet packet? Using this formula, what is the minimum required packet size for an Ethernet that spans 3 kilometers? Assume the speed of propagation is 1.8 × 108 m/s and R=10 Mbps.
Channel utilization with pipelining. Suppose a packet is 10K bits long, the channel transmission rate connecting a sender and receiver is 10 Mbps, and the round-trip propagation delay is 10 ms. What is the channel utilization of a pipelined protocol with an arbitrarily high level of pipelining for this channel? 1.0 0.1 0.001 0.01 10.0 Not quite. Your answer is incorrect.
Discuss any two constraints of computer networks based on shared media with the aid of suitable illustrations.Are there any differences between half duplex traditional Ethernet, half duplex fast Ethernet, and half duplex gigabit Ethernet in terms of slot time and maximum network diameter? Explain!If a company has a single Fast Ethernet hub, it may divide its network into three Fast Ethernet hubs linked by one Fast Ethernet switch to form a Fast Ethernet LAN. Are split networks more efficient than their original counterparts? With the aid of a suitable diagram, explain.
Consider two hosts A & B connected by a point-to-point link with a data link rate of 1 Gb/s and signal propagation speed 2 x 10® m/s. What would the distance of the link (between two hosts) be to exactly contain one 800-byte packet? Consider two hosts C & D connected by a point-to-point link with a data link rate of 10 Gb/s. The hosts are 2 km apart and the signal propagation speed is 2 x 10° m/s. Given the packet size is 500 bytes, how many packets can be in inflight from C to D?
Why Frame Relay was originally designed for use across Integrated Services Digital Network (ISDN) interfaces? A connectionless protocol, such as Ethernet, defines the route of a packet through source and destination addresses. However, a connection-oriented protocol, such as ATM, defines the route of a cell through virtual connection identifiers (VPIs and VCIs). Could you explain this statement?
3.4-8 Channel utilization with pipelining. Suppose a packet is 10K bits long, the channel transmission rate connecting a sender and receiver is 10 Mbps, and the round-trip propagation delay is 10 ms. What is the channel utilization of a pipelined protocol with an arbitrarily high level of pipelining for this channel?
Consider a wireless LAN with the following information: IEEE 802.11 physical layer transmission rate = 96Mbps, and • MAC layer data = 1096 bytes • MAC header = 16 bytes •ACK = 34 bytes • SIFS Time 12μs • DIFS Time=26µs • Physical layer overhead = 22μs Assume that the propagation time is negligible. Also, assume that for RTS and CTS frames there is no MAC layer error detection used (i.e., no error detection of possible errors in the Physical Layer header). Find the MAC layer throughput if: a. RTS/CTS transaction is used. b. RTS/CTS transaction is not used.
What is the total delay (latency) for a frame of size 5 million bits that is being sent on a link with 10 routers each having a queuing time of 2 µs and a processing time of 1 µs. The length of the link is 2000 Km. The speed of light inside the link is 2×108 m/s. The link has a bandwidth of 5 Mbps. Which component of the total delay is dominant? Which one is negligible?
A data channel at 5 Gbps is shared by two users. Assume that each user is transmitting at 2.5Gbps data rate continuously. Each user only transmits only 30% of the time. (a) If circuit switching is used, how many users can be supported? (b) If packet switching is used, would there be queuing delay to accommodate these two users? If a third identical user is added will there be a queuing delay? (c) What is the probability that a user is sending data? (d) Now assume three users under packet switching. Compute the probability that at any given time all three are transmitting at the same time. What is the fraction of time when the queue is growing?
Suppose that we are sending a 30 Mb MP3 file from a source host to a destination host. All links in the path between source and destination have a transmission rate of 10 Mbps. Assume that the propagation speed is 2 × 108 meters/sec, and the distance between source and destination is 10,000 km. 1. Suppose there is only one link between source and destination. Also suppose that the entire MP3 file is sent as one packet. What is the transmission delay? 2. Referring to the above question, what is the end-to-end delay (transmission delay plus propagation delay)?