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    Graded Recitation - Ethernet Chap4.3 Tanenbaum 2011 Edition

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    Jairo Tanyag
    This document contains 11 multiple choice questions about computer networks from Chapter 4.3 of the textbook "Computer Networks" by Tanenbaum, 2011 edition. The questions cover topics such as: - The baud rate of classic 10-Mbps Ethernet - Encoding schemes used in Ethernet such as Manchester and differential Manchester encoding - Parameters of a 1 km 10-Mbps CSMA/CD LAN such as propagation speed and effective data rate - Exponential backoff contention resolution in CSMA/CD - Minimum frame sizes for gigabit Ethernet over different cable lengths and speeds - Ethernet frame sizes, padding, and implications for faster speeds - Maximum frame size specifications in Ethernet - Clock speeds in gigab

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    Graded Recitation - Ethernet Chap4.3 Tanenbaum 2011 Edition

    Uploaded by

    Jairo Tanyag
    94 views1 page
    This document contains 11 multiple choice questions about computer networks from Chapter 4.3 of the textbook "Computer Networks" by Tanenbaum, 2011 edition. The questions cover topics such as: - The baud rate of classic 10-Mbps Ethernet - Encoding schemes used in Ethernet such as Manchester and differential Manchester encoding - Parameters of a 1 km 10-Mbps CSMA/CD LAN such as propagation speed and effective data rate - Exponential backoff contention resolution in CSMA/CD - Minimum frame sizes for gigabit Ethernet over different cable lengths and speeds - Ethernet frame sizes, padding, and implications for faster speeds - Maximum frame size specifications in Ethernet - Clock speeds in gigab

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    Graded Recitation - Ethernet Chap4.3 Tanenbaum 2011 Edition(2)

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    This document contains 11 multiple choice questions about computer networks from Chapter 4.3 of the textbook "Computer Networks" by Tanenbaum, 2011 edition. The questions cover topics such as: - The baud rate of classic 10-Mbps Ethernet - Encoding schemes used in Ethernet such as Manchester and differential Manchester encoding - Parameters of a 1 km 10-Mbps CSMA/CD LAN such as propagation speed and effective data rate - Exponential backoff contention resolution in CSMA/CD - Minimum frame sizes for gigabit Ethernet over different cable lengths and speeds - Ethernet frame sizes, padding, and implications for faster speeds - Maximum frame size specifications in Ethernet - Clock speeds in gigab

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    94 views1 page

    Graded Recitation - Ethernet Chap4.3 Tanenbaum 2011 Edition

    Uploaded by

    Jairo Tanyag
    This document contains 11 multiple choice questions about computer networks from Chapter 4.3 of the textbook "Computer Networks" by Tanenbaum, 2011 edition. The questions cover topics such as: - The baud rate of classic 10-Mbps Ethernet - Encoding schemes used in Ethernet such as Manchester and differential Manchester encoding - Parameters of a 1 km 10-Mbps CSMA/CD LAN such as propagation speed and effective data rate - Exponential backoff contention resolution in CSMA/CD - Minimum frame sizes for gigabit Ethernet over different cable lengths and speeds - Ethernet frame sizes, padding, and implications for faster speeds - Maximum frame size specifications in Ethernet - Clock speeds in gigab

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 1

    Refer to Chapter 4.

    3 (pages 280-299) of Computer Networks by Tanenbaum 2011 edition

    1. What is the baud rate of classic 10-Mbps Ethernet?

    2. Sketch the Manchester encoding on a classic Ethernet for the bit stream 0011110101.

    3. Sketch the differential Manchester encoding for the bit stream of the previous problem.
    Assume the line is initially in the low state.

    4. A 1-km-long, 10-Mbps CSMA/CD LAN (not 802.3) has a propagation speed of 200
    m/sec. Repeaters are not allowed in this system. Data frames are 256 bits long, including
    32 bits of header, checksum, and other overhead. The first bit slot after a successful
    transmission is reserved for the receiver to capture the channel in order to send a 32-bit
    acknowledgement frame. What is the effective data rate, excluding overhead, assuming that
    there are no collisions?

    5. Two CSMA/CD stations are each trying to transmit long (multiframe) files. After each
    frame is sent, they contend for the channel, using the binary exponential backoff algorithm.
    What is the probability that the contention ends on round k, and what is the mean number
    of rounds per contention period?

    6. Consider building a CSMA/CD network running at 1 Gbps over a 1-km cable with no
    repeaters. The signal speed in the cable is 200,000 km/sec. What is the minimum frame
    size?

    7. An IP packet to be transmitted by Ethernet is 60 bytes long, including all its headers. If


    LLC is not in use, is padding needed in the Ethernet frame, and if so, how many bytes?

    8. Ethernet frames must be at least 64 bytes long to ensure that the transmitter is still going
    in the event of a collision at the far end of the cable. Fast Ethernet has the same 64-byte
    minimum frame size but can get the bits out ten times faster. How is it possible to maintain
    the same minimum frame size?

    9. Some books quote the maximum size of an Ethernet frame as 1518 bytes instead of 1500
    bytes. Are they wrong? Explain your answer.

    10. The 1000Base-SX specification states that the clock shall run at 1250 MHz, even though
    gigabit Ethernet is only supposed to deliver 1 Gbps. Is this higher speed to provide for an
    extra margin of safety? If not, what is going on here?

    11. How many frames per second can gigabit Ethernet handle? Think carefully and take into
    account all the relevant cases. Hint: the fact that it is gigabit Ethernet matters.

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