Answered: ridges are empty. List all ports on…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Consider a local area network (LAN) with multiple stations connected to the same bus using the Carrier Sense Multiple Access with Collision Detection (CSMA/CD) protocol for medium access control. Assume that each station has a packet to transmit and follows the CSMA/CD protocol to access the medium. The first station to sense the medium finds it idle and starts transmitting its packet. The second station also senses the medium as idle and starts transmitting its packet, but halfway through the transmission, it detects a collision with the first station’s packet. After detecting the collision, the second station follows the backoff and retransmission procedure specified by the CSMA/CD protocol. Assume that the backoff algorithm uses binary exponential backoff with a maximum number of retries of 10 and that the slot time is 512 bit times. (a) What is the minimum number of slots the second station must wait before attempting to retransmit its packet after detecting the collision? Show…
2. Consider a slotted TDM hierarchical network in which there are 8 computers sharing a 10 Mbps channel to a router R1, sending packets to R1 which must all be forwarded by R1 over an outgoing link (called the MAN link), as shown in Figure 1. Computers A-H always have packets waiting to be sent, so no timeslot on the shared LAN is idle. Ignore the propagation delay on the LAN. The MAN link outgoing from R1 is a 100 Mbps link. The network layer protocol in use has a PDU with exactly 40 bytes of header and exactly 200 bytes of payload (SDU). The DLC layer protocol in use on the LAN has a PDU with exactly 40 bytes of header and 20 bytes of trailer. The DLC layer protocol in use on the outgoing link from R1 has a PDU with 40 bytes of header and no trailer. The physical layer does not impose any bit overhead in either channel. Use 1 Mbps = 1000000 bps. B D E F G H R1 R2 Figure 1 (a) What is the transmission delay of a bit for Computer A? (b) What is the transmission delay of a DLC PDU for…
In Checkpoint B, the game will be playable as a two-player game, albeit the competition will be a computer player who makes moves randomly. Implement these functions from the template following the description (specification) in their docstring: shuffle() replace_deck() deal_initial_hands() play_hand() should be extended to support 'random' mode The main function to drive the game has been provided. In 'interactive' mode, play_hand() should behave the same way as in Part A In 'random' mode, the computer selects actions randomly. Compared to 'interactive' mode: Every call to input() for the player should be replaced with a random choice Extra printed feedback for the player should be omitted For testing, we have hard-coded the seed 26 for the random source Hint: you can use random.randint(x, y) to select a number between x and y, inclusive. In particular, "flipping a coin" would be accomplished via random.randint(0, 1) Sample input/output When the inputs are: yes 1 no yes 9 The…

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ridges are empty. List all ports on which a packet will be forwarded by bridges B1 and B2 for the following sequence of data transm