1. The following figure shows a virtual circuit network. Station A is going to send information to Station B through two switches: S₁ and S₂. A virtual circuit is set up for this communication: A → S₁ ⇒ S₂ ⇒ B. For this virtual circuit, the VCIs over the three hops are 34, 18, and 34, respectively i) Which device assigns VCI "18"? ii) Please give the switching table at switch S2. A S₁ Port 1 Port 2 Port 1 52 Port 2 B

1. The following figure shows a virtual circuit network. Station A is going to send information to Station B through two switches: S₁ and S₂. A virtual circuit is set up for this communication: A → S₁ ⇒ S₂ ⇒ B. For this virtual circuit, the VCIs over the three hops are 34, 18, and 34, respectively i) Which device assigns VCI "18"? ii) Please give the switching table at switch S2. A S₁ Port 1 Port 2 Port 1 52 Port 2 B

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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Given five inputs (a, b, c, d, e) connected to 8051’s port P1 and P2 with : P1.0 = a, P2.0 = b, P1.3 = c, P2.7 = d et P1.6 = e. Outputs S0 and S1 are connected to P3.0 and P3.1 respectively as shown in the figure below. We propose to realize the following logic S0 = a.b + c.d + e.(a.b + a.b) S1 = c.b + d + e.a.b
Show all working explaining detailly each step.
5.01-3. Dijkstra's Algorithm (1, part 3). Consider the network shown below, and Dijkstra's link-state algorithm to find the least cost path from source node U to all other destinations. Using the algorithm statement and its visual representation used in the textbook,complete the third row in the table below showing the link state algorithm's execution by matching the table entries (a), (b), (c), (d) and (e) with their values. Write down your final [correct] answer, as you'll need it for the next question; the *s shown correspond to your answers to earlier parts of this question. [Note: You can find more examples of problems similar to this here B.) (a) 3 (b) 8 ·V- 2 X Step 0 u 11 1 2 (a) 4 * 2 6 -W 3 W X y Z N' D(v),p(v) D(w).p(w) D(x),p(x) D(y).p(y) D(z).p(z) 00 1 (b) Z (c) [Choose ] [Choose 1 (d) (e)
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Q5. A. A Mealy sequential circuit has one input (X) and one output (Z). The circuit should transmit its input, except that it should prevent the sequence 00110 from occurring. So Z should be the same as X, except that if the input sequence 00110 occurs, Z should be 1 rather than 0 when the last 0 is received, so that the sequence X = 00110 is replaced with Z= 00111. Derive only the state graph, and the state table. Solution:
convert the communication diagram into a sequence diagram
1. For traffic signal control in a T junction: Provide the allocation List Draw the Grafcet and obtain the grafcet equation Develop the ladder programming from the grafcet Figure below shows the T junction with three traffic signals. Each traffic light cycles through red (i.e. stop) time depends on the other two signals, red & amber (i.e. get ready to go) for 5 seconds, green (go) for 20 seconds, and amber (stop if safe to do so) for 5 seconds. major road Hoo SIGNAL 3 3 2 SIGNAL 2 SIGNAL I minor road Figure
In this and the following question, consider those TMs that satisfy all of the following properties: Q={90,91,9a9r}: there are exactly two states besides the accept state and the reject state. • Σ={1}: the input alphabet has just one symbol. • [={1,_}: the tape alphabet has two symbols, where is the blank symbol. • The head is moved in every step, that is, 8 uses only L and R, but not N. • If the machine is started on the completely empty tape, it will halt after a finite number of steps, that is, it will reach qa or qr. If such a TM is started on the completely empty tape, it will leave a certain number of 1 symbols on the tape after it halts. What is the maximum number of 1 symbols on the tape, among all of these TMs? Answer: Check Consider again the TMs of the preceding question. If such a TM is started on the completely empty tape, it will make a certain number of transition steps. What is the maximum number of steps, among all those TMs? Answer: Check
Generate transient queue length in repsonse arrival and service rates with a functioning VBA code
1) Given an O/S with soft timers using a single clock, consider a situation where the event list looks like this: Current time = 4105; Next Signal = 6; Clk Header → 6 → 1 → 3 → 12 → 5 a. What will current time be when the “12” signal is dispatched = b. At time 4113 a new signal arrives to be scheduled for 4125, fill in the following to reflect this signal being added at that time: Current time = ; Next Signal = ; Clk Header → 2) Given a disk with 100 tracks, Consider the following disk request sequence (track numbers): 45, 20, 90, 10, 50, 60, 80, 25, 70. The initial position of the R/W head is on track 50. Determine the distance that will be traversed by the R/W head when the Shortest Seek Time First (SSTF) algorithm is used and the Elevator algorithm (note -the Elevator algorithm will move towards 100 when it starts execution). Which algorithm will move the fewest tracks , SSTF or Elevator: , and by how many fewer tracks: tracks less than the other algorithm.
5.01-1. Dijkstra's Algorithm (1, part 1). Consider the network shown below, and Dijkstra’s link-state algorithm to find the least cost path from source node U to all other destinations. Using the algorithm statement and its visual representation used in the textbook, complete the first row in the table below showing the link state algorithm’s execution by matching the table entries (a), (b), (c), and (d) with their values.
Consider an (n, k) block code with the following generator matrix. Find the following: * The values of n and k. * The detection and correction capacities of the code. * The codeword c for the message mF1001. 0 1 0 1 10 0 1 0 10 10 0 0 1 1 0 0 1 0 1 1 0 0 0 0 1 G = The syndrome for the received vector r= 1101011. Assume this code is used on a channel with Poe=0.01. What is the probability of receiving codeword free from error?