Computer Network Questions and Answers June 25, 2018

Find the IP addresses of mcgill.ca's authoritative name server. Include the command(s) you used.

As a network administrator, you will write a system monitoring Python script to achieve below requirements: The script will run at 3am every Sat. In the top of your report, we need to see the monitored system name, IP address, report date/time. All software installed in the past 7 days will be listed with only their name and installation date.

vity 005532 ng Table Device Interface IP AddressMask Default Gateway R1 GO00 2001 db8 cafe a164 fe801 GO01 NA 2001 db8 cafe b 164 fe801 Zurich GO00 2001 db8 cafea 264 fe801 GO01 NA 2001 db8 cafe c 164 fe801 S2 SVI Hostl NIC 2001 db8 cafe b ff64 fe80 1 PC2 NIC 2001 db8 cafe.c1564 fe801 Develop an IP Addressing Scheme part of the assessment you

10. Which network is most secure usually from interference from most other wireless devices a. 802.11 b b. 802.11a c. 802.11g d. 802.11n (2.4 GHz)

https://www.agilealliance.org/agile-essentials/ Read Agile Essentials and Agile 101. What does this site say about project management and software development life cycle? Write a 5 line summary of your findings and opinions on this topic.

There are 3 basic approaches in Cybersecurity: Attack, Defense, and Forensics. Forensics figures out what happened at a system to keep attackers responsible. What other benefits a company can get from having forensic investigation capabilities?

3. Wireless should not be used in mission critical situations unless there is either a backup network or somewhat costly and extensive security (including intrusion detection and rogue signal detection and policing). (TF)

Compare/Contrast features of all servers of Microsoft Windows to date. Please develop a comparison/contrast table in a Word document.

Fetch instruction Decode instr select regs. Execute instr. store result (a) Fetch Decode instr Execute Store instruction select regs. instruction result (b),The following code segment is to be executed on a RISC processor with 1 R1 R2 R3 2 R4 R1 R2 3 R3 R1 R4 4 R5 R2R6 5 R6 R1 R2 6 R7 R5 R6 1) a threestage instruction pipeline shown in figure

Assume that users Alice & Bob wish to compute shared session key using Diffie-Hellman key exchange protocol. Alice and Bob have agreed on prime q = 13 and a = 7. Alice and Bob select their corresponding secret keys XA = 8, XB = 10. Consider an attacker Darth who is in the middle of this communication and launches a man-in-the-middle (MitM) attack.

Answer the following questions by using the figure below. Assume the control memory has 1024 words of microinstructions, each microinstruction is 32 bits wide. There are 4 status in the system to check. How wide the control address register (CAR) should be? (5 pts) How many bits in status select field (5 pts) How many bits are there in the branch

Instruction code Mapping logic Status Branch MUX bits logic select Multiplexers Subroutine register (SBR) Clock Control address register (CAR) Incrementer Select a status bit Branch address Control memory Microoperations

1. (10) If x is greater than or equal to zero, then assign the square root of x to the variable sqrtx and print out the result. Otherwise, print out an error message about the argument of the square root function and set sqrtx equal to zero. 2. (10) The cost per mile for a rented vehicle is 1.25 for the first 100 miles, 0.75 for the next 200

You were recently employed as a Network Engineer at UCT in the ICTS department and received a complaint from a student transferring data between two sites directly connected to the UCT network saying that hisher data is taking forever to transfer. The student is blaming the slow network for this although both sites have 10Gbps connections. The

1.2 Imagine youve been hired as an IT consultant for a small business that is expanding its operations and needs to set up a new network to accommodate its growing number of employees and devices. The business has been allocated the IP address range 192.168.0.024 by their internet service provider (ISP). They need separate subnets for different

operations Create a star topology network and perform the following a) Use a router for the network and apply DHCP setting on it such that a range that includes 5 IP addresses are exempted for addressing. b) Configure the IP address of the devices in the network using DHCP. c) Show that the communication between the devices in the network is

14. You are given a IPv4 address 10.0.46.239, the original subnet mask 255.255.0.0 and the new subnet mask 255.255.240.0. Using the new subnet mask, determine the following 35pts 1. Number of subnet bits II. Number of subnets that will be created III. IV. Number of host bits Network address of current IP address V. First host in network of current

a) Consider a firm that had 24 network. Suppose that the company wants to redesign the network with 16 subnets and 14 hosts per subnet as a part of the new organisational structure reshuffle. Answer the following questions based on this scenario. 1. What would be your design approach subnets and hosts per subnet in order to accommodate the changes

1. Suppose your Company uses the Class B network ID of 190.55.0.0 for its entire network and wants to create 11 subnets. Answer the following questions a. For the subnets, how many bits must be borrowed from the host address bits (show how you get to the answer) marks 2 b What is the subnet mask for these subnets, after borrowing bits from the

6. (6 points) A company has a network address of 140.192.1.64 with a subnet mask of 255.255.255.192. The company wants to create subnetworks that would contain 10 hosts each. The company wants to make the most efficient use of addresses. a. What Subnet Mask should they configure on these hosts b. How many subnets do they obtain c. List the Subnet

1. Write structure of class A, B and C type of IP addresses and show how many hosts are theoretically possible for each network. Why practically 2 hosts are less than theoretical value (3 marks) 2. Generate the first and last host IP address of the 5th subnet for the following IP. (3 marks) 112.155.180.4613 3. What is the subnet mask in decimal

3. (15 points) An organization is granted the block 130.56.0.016. The administrator wants to create 1024 subnets. Assume no IP address is reserved for special tasks. a. What is (are) the subnetmask (s) b. What is the IP address of the first host in subnet 1 Show your answer in decimal IP notation. c. What is the IP address of the last host in

1. (10) Write the MATLAB statements required to plot sin x versus cos 2x from 0 to 2x in steps of 10. The points should be connected by a red line and each point should be marked with a blue circular marker. 2. Write the MATLAB text string that will produce the following expressions a. (5) b. (5) f(x)sin 0 cos 20 Plot of Ex versus x 3. (5) How do

It is very common in science and engineering to work with large data sets (large sets of numbers which are stored in a data file), which represent particular measurements in an experiment. We typically summarize the data set using statistical measurements. We are interested in the average (or mean), variance and standard deviation of the data. The

1. The first step in developing a hybrid implementation of a programming language is to design an ab stract machine. In order to execute a program written in the source language, we need a compiler that translates the source and generates object codes in the abstract machine language, which are in turn interpreted by an abstract machine emulator

4. (a) (12) You are given the following Clike code. int foo (int p) p 1 return 2 int bar (int p) p 3 return 4 int main() int x 10, y yxfoo (x) bar (x) Statement A There are at least three ways to evaluate the expression in statement A that results in variable y taking three different values. Briefly elaborate the three ways and state

5. (a) (4) CCJava and Perl share similar syntax for an ifthenelse statement. However, CCJava allows the then and elseclauses to be either a single statement or a com pound statement (using ( )), while Perl requires that all then and elseclauses must be compound. Provide a reason to justify the Perl design. (b) (6) What is the output of the

6. (a) (6) You are given the following code. void foo (int w, int x, int y, int z) W 11 x 12 y 13 z Z 2 int main() int a 1, b 2, c 3 foo (a, b, b, 2 c) Suppose formal parameters w, x, y, and z are passed by value, by result, by value result, and by reference respectively. There exists some problem(s) in the above code regarding

7. (8) You are given the following Prolog code. foo (alice, carol). bar (bob, carol). bar (bob, dave). bar (eve, bob). qux (X, Y) ham (Z, X), ham (Z, Y). ham (X, Y) bar (X, Y). ham (X, Y) foo (X, Y). Suppose the query is qux (X, dave). What isare the answer substitution(s) given by Prolog What isare the answer(s) of the query

1. You are given the following Clike code. int x void f() int x 10 h() void g() int x 100 h() void h() printf(d , x) int main() x 1 f() g() (a) (6) What is the program output if static scoping is used in the above code (b) (6) What is the program output if dynamic scoping is used in the above code (c) (4) Practically, dynamic scoping is

1. Find the output of the following program. public class NO1 public static void main(String args) System.out.println(fun(100)) System.out.println(fun(9)) System.out.println(fun(873)) public static int fun(int n) if (n 0) return 1 else if (n 10) return 1 else return (1 fun(n10))

C. Consider the implementation of the selection sort algorithm shown in the code segment in Listing 2. 123 4 5 6 7 8 9 10 11 12 13 14 Listing 2 A Selection Sort Method public static void selectionSort (int data) public int i, j, tap, minIndex for (i0 i

5. om element in Element to the bottom element in myStack, leaving fly Write a segment of code to perform each of the following operations. Assume myQueue is an object of the class ArrayQueue. You may call any of public methods of 1 Set rearElement to the rear element in myQueue, leaving myQueue empty. 2 Set rearElement to the rear element in

2. Consider the following program def my decorator (functodecorate) def my wrapper (args, kwargs) print (In wrapper, wrapping () .format(functodecoratename)) result functodecorate (args, kwargs) print (Still in wrapper, returning wrapped .format(functodecorate.name)) return result return my wrapper my decorator def add list (int list) result sum

6. (15 pt) Function recur() has its prototype shown below Complete C function recur() corresponding to the IA32 code on the right. int recur(int a, int n) recur pushl ebp movl esp, ebp pushl ebx subl cmpl 20, esp Smov ajne movl jmp 0, 12(ebp) .L2 8(ebp), ecx (ecx), eax .L3 .L2 12(ebp), eax leal (ecx, eax, 4), eax movl (eax), ebx movl 12(ebp), eax

Write a C program that allows a single Player (the user) to play a simple three dice game of chance against The Odds. 1. There is a single player, with three eight sided dice. 2. The sides of each die are labeled with the numbers from 1 to 8, we will call this the value of the die. 3. A game is made up of rounds, a single round is played as such

a) Write an algorithm for a Bubble Sort. b) Dry run the Bubble sort algorithm to sort the following given list into descending order. 95, 25, 45, 200, 5, 55, 2, 77 C) How many key comparison bubble sort has made in the above given case and how many item assignments you have made in this sort.

The SATISFIABILITY problem is, given a collection of clauses, such as, (x1 V x2 V x3 V x4), (x2 V x3 V x1), (x1 V x4) assign values to all x such that each clause evaluates true. This problem reduces to 3SAT, where each clause has exactly three literals. (a) Show how a single clause that is not in the proper 3SAT form is made by the reduction into

Addition of two positive integers takes O(k) time by the standard addi tion algorithm, with k the total length of the representation in binary of the integers. The following recursive function M defines multiplication, X M(x,y) 2 M(x,y2) for y 1 for y even x2 M(x, (y1)2) for y odd and not 1 for positive integers x and y. For instance, M(6,5) 62

A weighted directed graph is shown in Figure 1. Answer the following questions. (a) Consider breadthfirst traversal from the node A over the directed graph (Figure 1), where the weights on the graph are ignored. Show the node and the content of the queue, when the a breadthfirst traversal visits a node for every node in iteration. Give the final

8. (5 marks) Find the shortest path from node 1 to node 7 in the graph below, using Dijkstras algorithm. You should show each step clearly. 20 7 5 2 2 3 10 9 4 8 6

13. HighResolution Audio is audio that uses a higher sampling rate than in CDquality for the encoding and playback of music. HighResolution Audio files have a sampling frequency of 96 kHz24 bit, which is significantly higher than the 44.1 KHz16 bit sampling frequency of CDs. a. What bit rate is needed to support highresolution audio b. What bit

6. Explain the following properties that a heap satisfies 1) HeapOrder Property (3 points) 2) Complete Binary Tree Property (3 points)

3. Show a tree of achieving the worstcase running time for the following algorithm depth. Assume that the size of the tree is n (6 points). Public int depth (Position p) if (isRoot(p)) return 0 else return 1 depth (parent(p))

4. Consider the following binary tree 3 9 3 6 1) Write out the output expression without parentheses, obtained by visiting all the nodes with inorder traversal (4 points). 2

5. 14 marks This question studies the proof of Savitchs theorem. You may assume the TM M in the proof can compute function f(n) in the proof in O(f(n)) space. (a) 2 marks In words, give a highlevel overview of how the proof of Savitchs theorem works. (b) 6 marks The CANYIELD procedure in the proof has 6 steps Describe in a sentence or two the

7.7 Implement a quasiNewton algorithm based on the DFP formula in a com puter language of your choice and use it to minimize f(x)100(x2x) (1 x1)

A 11 B 9 C 10 6 7 5 2 D E 14 3 12 1 15 LL F G H 13 4,Note that in the above graph, all edges have distinct weights. Hence the graph has a unique MST. To show that edge (B, D) is included in the MST, we only need to find a cut such that (B, D) is a light (cheapest) edge crossing the cut. For example, (B, V B) here V denotes the entire set of

5 Give the addressing mode for each of the following (a) MOV AX,DS (c) MOV CX,3000 (e) MOV DI,BX (g) MOV DX,BPDI4 (i) MOV BP6, AL (k) MOV BL,SI10 (b) MOV BX,5678H (d) MOV AL,CH (f) MOV AL,BX (h) MOV CX,DS () MOV AH,BXSI50 (1) MOV BPSI12.AX

. (25pts) Find the best least square fit by a linear function to the data 2 0 1 3 y 3 4 0

4. Write a MATLAB function that draws N i.i.d. random variables X from a distribution a. fx(x) x2 0 x 2 The output of your function should be a single number the average all the N generated random variables W N Xi Run your code for N2, N10, and N200 and present a printout of your code and the results. b. Loop you code 5,000 times for N2, N10,

III. a) Apply the subnet mask 255.255.252.0 to the IP address 192.105.103.211 b) Apply the subnet mask 255.255.255.192 to the IP address 131.200.105.145

Consider a Playfair cipher that uses the password WORKHARD. 1. Construct the matrix associated with this Playfair cipher. 2. Encrypt the plaintext message EVENINGS. Show your work step by step. Otherwise, your answer is wrong. 3. Decrypt the ciphertext message NYEECTYLYL. Show your work step by step. Otherwise, your answer is wrong.

2. Let R be the relation (1,2), (1,3), (2,3), (2,4), (3,1)), and let S be the relation ((2,1),(3,1), (3,2), (4,2)) Find SoR.

8) To record sound, a computer must encode analog sound into digital form. During this process samples of the sound have been taken. The figure below show 6 samples that have been taken and stored in the computer memory. These samples below have been taken from an analog signal over a period of one hundredth of a second. Sample 6 01101101 Sample 5

b. For the flowgraph shown in the figure here, compute the McCabes Cyclomatic Complexity and the number of test cases needed for the basis path testing of the code that this graph models. 1 112 2 4 5 6 Figure 1 Flow Graph

Use Kruskals Algorithm to find a minimumweight spanning tree in the graph below. What is the weight of this tree T 2. 10 11 5 12 7 3

Deff on test Consider the following snapshot of a system Allocation Max Available ABCD ABCD ABCD LALLA Po 2001 4212 2222 P 3121 5252 P2 2103 2316 P3 1312 1424 PA 1432 3665 Using the bankers algorithm, is the system in a safe state Justify your answer.

4. 12 points Consider the following map coloring problem, where each region of the map must be colored one of R, G, B, Y), and no neighboring regions may have the same color. Furthermore, we require that node C be green (G) that nodes W1, W2, W3 may not be colored red (R) and that nodes L1, L2, L3 may not be colored blue (B). L2 W1 L1 W2 L3 W3 a.

1. Start with the code below and complete the getInt method. The method should prompt the user to enter an integer. Scan the input the user types. If the input is not an int, throw an IOException. Modify the main method so that it catches and prints the IOException. import java.util.Scanner public class Throwing public static void main(String

Given Account.java Which of the following are actual parameters (also called arguments)? Account.java Which of the following are formal parameters (also called parameters)? Account.java Which of the following are local data (local variables)? Account.java Which of the following are members of the class Account?

01 public class Account 02 03 04 private double balance private String name private long acctNum public Account (double initBal, String owner, long number) balance initBal name owner acctNum number public void withdraw (double amtToTake) balance amtToTake public void deposit (double amtToAdd) balance amtToAdd public double getBalance() return

Topology S1 192.168.1.024 R1 192.168.2.024 192.168.3.024 192.168.4.024 R3 R2 53 192.168.5.024 Objectives Part 1 Perform a Basic Interface Configuration on PC1, PC2, and PC3. Part 2 Perform a Basic Interface Configuration on R1, R2, and R3. Part 3 Configure R1, R2, and R3 with RIP dynamic routing protocol. Background Routing Information Protocol

1. Describe how a cycle is similar to a Euler circuit. 2. Write a set of stepbystep instructions to form an algorithm for converting an inefficient network into an efficient network. 3. The numbers in the following graphs depict the cost associated with building a railroad between cities represented by vertices. For each graph, test your

Which one of the following is true about pipeline: a ) throughput goes up , latency goes down b ) throughput goes down, latency goes up c ) throughput goes down, latency goes down d ) throughput goes up , latency goes up

The trail of a bit through an encryption is the set of bits at each step that depend on the initial bit. In this exercise, you will follow the trail of a bit through the AES encryption. For an example of how we will picture this, here is the trail of a bit through the Sbox each box represents a byte, each dot a bit, and the xs are the bits in the

Prove that if i and j are any positive integers, and i j, then the Li norm between any two points is greater than the L. norm between those same two points.

1. You set up your organizations VPN, so that only sensitive, private, and confidential traffic must travel through the encrypted tunnel. Public data does not travel through the VPN. This speeds up the VPN. Which of the following technologies are you MOST likely using? A. split tunnel VPN B. on-demand VPN C. always-on VPN D. full

How do you stop a worm virus from spreading that is basically already spreading into the computing system?

Research using a critical approach may produce findings that challenge individuals in sport management positions. Identify examples of possible research findings that might be rejected or ignored by executives for a professional sport team.

How do blockchains work? What is the purpose of a hash?

Discuss how trademarks have affected e-commerce.

What is IT Hybrid? And Explain the reasons why companies need to adopt hybrid IT technology.

Configure the backup to use the following settings: o Backup configuration: Custom o Backup items: System state o Advanced setting: VSS full Backup How would you perform this task in PowerShell ?

Discuss Networking technologies. Research Software Defined Networking (SDN). Write 300 + words explaining the technology.

NIST has a well-defined Cloud Standard; compare How Amazon, Google, and Microsoft Public Cloud's offerings meet NIST standards?

Using information gleaned from the Case Study, textbook readings, assigned readings, and your own research, describe the methodology of a network attack including the various steps in an attack along with mitigation solutions for each.

Explore common issues found with using VLANs and best practices for their use on an enterprise network.

Order the planning methodsor strategiesthat would be suitable for implementing technology within an organization. (a) Discuss contingencies to take risks into account (b) Define the requirements/goals so that you can plan how to achieve them (c) Set up appropriate reporting tools (d) Set a timeline for development and implementation (e) Conduct a

According to the Innovators, explain how the transistor was discovered and how the transistor can be considered one of the greatest inventions of the 20th century. What insights can we learn from its creation?

Define vulnerabilities, threat and exploits as it relates to information security. Describe two different types of threat actors. Explain the motivation behind the attacks of the threat actors that you selected. Propose at least one solution to avoid an attack?

How can Real Time Protocol (RTP) reduce cost IP network?

1. List at least 5 Server Management Software that support Virtualisation? 2. What are the two main consoles that Hyper-V uses for virtual machine management? 3. List at least 4 best practices when creating a virtual machine? 4. List the Integration Services that are available in the Hyper V Manager console? 5. How can a Network Administrator

Develop an algorithm, in the form of a Raptor flowchart, to compute and display the amount of federal income tax to be paid when provided with the income as input. The Canadian Federal income tax rates for 2023 are: 15% on the first $53,359 of taxable income, plus 20.5% on the next $53,358 of taxable income (on the portion of taxable income over

. Conduct research and review the pricing models for Amazon Web Services and Microsoft's Azure. . How are they similar and how are they different?

. Imagine you have an on-premises eCommerce site for a small local jewelry store. . The jewelry store sells rings, watches, necklaces and bracelets. . Review Amazon Web Services, Microsoft Azure and Google Cloud. Based on each cloud provider's service level agreements, performance criteria and pricing models, determine which would be the best

. Do policies exist within the Linux workstation or server environment? If so, what are they? . Are there ways that Windows policies can be leveraged to enhance corporate or security policy?

Consider the MCNF problem shown in the following figure (1,15) 20 (4,15) (5,15) (7,20) (2,10) (C, 10) (3,10) (8,10) C20 Solve the following parts independent of each other. Notation b(i) bcj) (Cij, U) Cij cost Ujcapacity (UB) ba) net supply a. 20 Using the network simplex algorithm, find an optimal solution of this problem. Use the following

Consider the following scenario: You might have been driving a little too fast when a police officer stops you. Write code to determine the type of ticket you are to receive and the charge of the ticket. The requirements are as follows: Define a function called: police The function should receive 2 arguments: speed, bday speed should receive the

Propose innovative quantum computing algorithms and applications beyond factoring and classical simulation, showcasing their potential to revolutionize fields such as artificial intelligence, cryptography, and optimization problems. Provide detailed explanations of how these new approaches leverage unique quantum features, such as superposition

Let the Boolean function F(w, x, y, z) (5,6,9,10). Using the Kmap, implement this function by using at most 5 twoinput gates. You are only allowed to use XOR, EQV, AND gates. Complements of the variables are not available.

Errori is 1) Identify and fix the two errors in the following Java program public abstract class A private int bi public A(int b) this.bb abstract public void display() public boolean check (int x) if (x0) return true else return false public class B extends A ( private int c public B(int b, int e) this.cci public boolean check (int x) if

What does the following code print public static void main(String args) int w new int 2 3 for (int x0 x

Fill in the blank spaces in the following program, in which the child process writes msg to the parent process char msg CSE201 int pdes2 pipe(pdes) if (fork() 0) child else Child writes to parent Parent reads from child

Consider the solution of the incompressible flow over an airfoil using the Finite Volume method. The velocity components (u,v) are given for some cells as shown in the figure. Evalaute the velocity components for the cell ACD. Note that the cell nodes are placed on a uniform background grid. E F (7.0) (71) D G (73) (8.2) (5.4) A B K M 4 units

calculate the height AB of the airplane. Known the airplane is at point B, the radar transmit at a speed of 3 108 ms, echoes received from the aircraft after 13000 seconds. The transmitted angle of radar is 30. Algorithm get the distance OB first, according to AB OBsin30 get the height of the airplane due to roundtrip time of radio is 13000

Write a function that count the number of vowels, the number of consonants and the average number of letters in each word. The function accept a CString (char array) or a string object as an argument and return the number of vowels, number of consonants and the average number of letters in each word. Requirements Use pointers as part of the

(5) 6. Comment the code and state the contents of memory locations 0x92 to 0x96 after the following program is executed MOV R1, 0x99 MOV R6, 0x92 STRB R1, R6 ADD R6, R6, 1 MOV R1, 0x85 STRB R1, R6 ADD R6, R6, 1 MOV R1, 0x3F STRB R1, R6 ADD R6, R6, 1 MOV R1, 0x63 STRB R1, R6 ADD R6, R6, 1 MOV R1, 0x12 STRB R1, R6 I

1. A part of the operating system is resident if it is always in memory, and virtual if it can be stored instead in virtual memory on disk. Which parts of an operating system must be resident, and which can be virtual Why 2. The linux disk journal is an apparent contradiction of the basic principle that the disk driver manages all device state.

Create a C program that generates a table of conversions pounds (lbs) to kilograms. Start the pounds column at 0 and increment by 5. The last line should contains the value 100 lbs. The first line should contain the headers for both columns. (Recall that 1lb 0.4535 kg). Use a While Loop Follow the Engineering problem solving methodology. Problem

1, The test results of a sample are 2, 3, 5, 7, 8, 9, the standard deviation is 2, What is the mean absolute deviation for a sample data set 3, A distribution of numbers is approximately bell shaped. If the mean of the numbers is 125 and the standard deviation is 12, between what two numbers would approximately 68 of the values fall Between what

Write a function void multiTable(int n) to print an nbyn multiplication table (starting with 1). Each number should be preceded by a tab. The output for the command multiTable(5) should be as follows 1 36925 24680 2345 10 4 5 8 12 16 20 2582 10 15 20