Computer Network Questions and Answers August 22, 2022

Suppose there is an organization that needs to reduce costs and improve network flexibility via the establishment of secure remote access to the company's network or public network such as the Internet. What are the techniques they can apply to make the required enhancement, explain it and what is your recommendation for them?

1. Read the initial configuration of the network to implement Access Control List. Initial Configuration Configure two networks A and B. Connect the two networks A B to the static routers R1regno and R2regno. In network A, configure one host (H1) and in another network (B), configure two hosts namely H2 and H3. The organization wants to provide a

This question is related to network security threats and securing network devices. On a Monday morning ,users in a company reported to the helpdesk that they had problems in accessing the files in the harddisk of their computers .The files could not be open and the icon of the files were changed. You are the system administrator of the company . A

Given a flow of eight (8) units from origin o to destination r in Figure Q2. Flow on each route OD is designated with Qxy in the Time Function. Apply Wardrops Network Equilibrium Principle (Users Equalize Travel Times on all used routes) Table Q2 Link Attributes (a) Link OP PR 0Q QR O Link Performance Function Top6Qop Tpr 24 Qpr Toq20 2Qoq

The precedence requirements, normal and crash activity times, and normal and crash costs for a RD project to develop a new communication system for commercial planes are listed in the following table. Activity ABCDEFGHI Preceding Activities A A B B, C C E, F D, E H, G Required Time (Weeks) Normal Crash 4 2 3 2 2 1 5 3 1 1 3 2 4 2 1 5 4 6 Normal

For the following 2 network flow models, write out the answers for the shortest route and minimal spanning tree. Charlottesville Staunton 2 Roanoke 85 53 88 40 Lynchburg 65 Danville 55 127 117 72 Richmond 24 6 Petersburg 2. (25 points) For the network shown above, determine a. The shortest route from Roanoke to each destination. b. The minimal

Bob is throwing a party to celebrate a new road network that connects n cities. He decides to invite n1 guests, one from each city other than his own city. Each invited guest plans to drive to the party using the road network, which can be modeled as a directed graph G (V, E) between cities. In this road network, if there is a road from one city

26) Suppose we are admitting users over a list with a transmission rate 100 Mbps. Suppose each one generates data traffic at 10 Mbps when active but it is active only 20 of the time. Suppose all the users are synchronized (i.e they are active at the same time). a) If circuitswitching is used what is the max. number of users that can be admitted b)

6. (a) Does the following graph contain an Euler path If yes, list its vertices in order (b) Does this graph contain an Euler circuit If yes, list its vertices in order a b K

(4) 4. Does the following graph contain a Euler circuit If so, find one. If not, does it contain a Euler path If so, find one. If not, explain why it contains neither a Euler circuit nor a Euler path. a b C d e f g h i

3) Using Depth First Search AND Breadth First Search to find a path from A to F. 3 marks H D L I B E A J C F M K

In 2019, Carestream Health employed more than 6,000 employees and operated in 150 countries. It was founded in 2007 when a private equity investment firm, Onex Corporation, purchased Kodak's Health Group. At the time of its acquisition, Kodak's Health Group had three primary businesses: Film, Mental Digital, and Digital Dental. Eileen Wirley, the

4. Consider the following graphs and answer the following questions with reasoning. G H 11 12 13 a. Do they have a Euler circuit b. Do they have a Euler path c. Do they have a Hamilton circuit d. Do they have a Hamilton path 1. k. 20 pts.

1) Determine whether the graph has an Euler path andor Euler circuit. A 0 E B D F If the graph has an Euler path andor Euler circuit, list vertices of the path andor circuit. If an Euler path andor Euler circuit do not exist, explain why.

Find the least expensive route from a to g in the graph. a 42 40 20 g 45 35 75 f b 85 55 60 e

2. Insert the following data in the tables (1.5 marks) DEPARTMENT dptID dpt Name BA DSG IT SCORE st Num Business Administration Design dptBuilding D Information Technology A scrMark 00 286860 85 crsCode scrDate 20201001 BADR1101 01022020 75.55 COURSE 20201001 BAAC3101 20203001 ITDR1101 20203001 ITIN3101 20203001 ITDR2106 crsCode crs Title

Draw a diagram of a typical data transmission path between an email client and a cloudbased email server indicating the physical media, wireless access point, and the local and remote switches and routers involved in data transmission. Your diagram should accurately map the layers of the TCPIP protocol architecture to the layers of the OSI

Write the SQL commands for the following details Design the Relational Schema for a plant nursery in your area. Your design should consist of at least two relations (tables). Perform the following on the relations a) Create three tables having at least 5 attribute names (5 columns) 3 different data types with appropriate sizes. Identify the

2. For the route planning problem shown in the figure, six cities are labelled as 16, and their connectivity and distances are given on the edges in the graph. If we start from city 1 and the destination is city 5, apply the following search algorithms to find a path. Provide details of the node expansion and the found path from start to goal. 1)

Organizations across private and public sectors may use a variety of encryption technologies for various purposes. Answer the following question(s): 1. What might be the effects of not using encryption on network or Internet traffic? 2. Why might vendors propose proprietary encryption methods rather than using standard encryption technologies?

Consider how an organization may use Facebook, Instagram, Twitter, and other network platforms. Describe two (2) different ways an organization can use social networking. How are various organizations using that site?

Kevin, a security professional, plans to implement wireless technology in his organization for easy and fast transmission of data in a wireless network. For this purpose, he uses a technology that belongs to the IEEE 802.16 family of wireless networking standards and can function over several miles with data rates reaching up to 75 Mbps. Identify

What is network optimization and why is it important? What key metrics are used to measure network performance? How can organizations monitor and manage networks to improve employee productivity and reduce costs?

Consider a search space defined by the table, which gives the cost of arcs between pairs of nodes. Node S is the start state and node G the goal. From To Cost S B 3 S C 2 Node h S D 4 B 4 B E 3 E 5 D F 1 E Z 2 a. Draw the complete graph of the state space, mark cost in the arc (or the edge) b. What path is the cheapest solution and what is its

2. Consider the network illustrated in Figure 1 A NAT configuration. The router has a private IP address (192.168.0.1), and a public IP address (114.24.10.1) What do the terms private IP address and public IP addresses mean (4 marks) (ii) Explain the purpose and operation of Network Address Translation (NAT) from the perspective of the Router. In

Consider the state space graph shown above. A is the start state and G is the goal state. The costs for each edge are shown on the graph. Each edge can be traversed in both directions. A 3 B 2 3 D 4 E A search with heuristic h A search with heuristic h 7 F 5 G State A B C D E F G h 12.5 12 11 5 1 4 0 h 11 10 a) For each of the following graph

1. Please write a summary address with minimum subnet which indicates to these four subnets. (15P) 192.168.4.024 192.168.5.024 192.168.6.024 192.168.7.024 Router A 2. You are designing a subnet mask for the 176.24.0.0 network. You want 100 subnets with up to 300 hosts on each subnet. What subnet mask should you use (20P) 3. What are the network

Select an organization to interpret and analyze its operating system, network protocols, and machine-level structures. ... Summarized network diagrams are needed along with your answers. Analyze the selected organizations security issues in computer networks What security issues has the selected organization encountered? Which of the four

1) Use the greedy strategy to find a route for a traveling salesman starting at A in the weighted graph G. Prices are in hundreds of dollars. 2) Compute the cost of this route 3) Did you get an optimal route Graph G 1 2 1 4 6 7 12 1 5 4 4 5 1 6 1 6 2 1

1) Provide a uniformcost search (UCS) on the graph below. You may find it helpful to execute the search on a piece of paper and then insert the scanned image into your logbook. Start m 3 6 5 A N B 2) Consider the following graph. The numbers written on edges represent the distance between the nodes, whereas the numbers written on nodes represent

assume that the cost function on each link is Route 1 a, bV Route 2 a bV Without loss of generality, assume (U,U2) be the user equilibrium solution and (S, S) be the system optimal solution. Consider the same graph as in Question 1. Now (1) Express the total system travel time under UE and SO using above notations. (10pts) (2) Show that the

1. A network on the Internet has a subnet mask of 255.255.248.0. What is the maximum number of hosts it can handle 2. Recap the route aggregation function of CIDR. A router has just been made aware of the routes from the following new IP prefixes 57.6.96.021, 57.6.104.021, 57.6.112.021, and 57.6.120.021. If all of them use the same outgoing line,

The following image shows an Activity-on-Arrow network for a simple project (assume all durations are in days). Answer the following questions: (a) List all the paths through this network. (3 mark) (b) What is the critical path? (3 mark) (c) What is the duration of the project? (1 mark) (d) What would be the effect on the project completion

A 1 1 B3 C 4 2 3 4 D4 E2 F 3 5 G2 16 H 2 6 01 J 1 7 K2 8 L 3 M 3

For years now, I have been bothered by the speed at which information technology (IT) has been advancing and in the way it is becoming more integrated in all aspects of our day to day lives. Undoubtedly, information technology seems to be perceived by most as a great blessing especially for the young generation. We are living in an IT revolution

Write the Boolean equation and draw a logic diagram implementing F by using the product of sums form and the sum of products form. ABCF 0 0 0 1 1 1 0 000 1 1 1 1 0 0 1 1 0 0 0 1 0 0 1 1 0 1 1 0 0 1 (a) (2 points) Use the product of sums form and draw the logic diagram for F no simplification needed. (b) (2 points) Use the sum of products form and

Draw a binary tree by adding the following nodes : 15; 8; 22; 4; 10; 2; 6; 9; 25; 18; 30 Do the complete traversal of the binary tree using the following traversal methods: 1. Pre-order 2. In-order 3. Post-order

Consider the following recurrence T(n) T(n1)10 (a) Assume that the base case is T(1) 0(1). Show that the solution to this recurrence is O(n) using (a) (8 points) The substitution method (the starting guess is T(n) O(n)) (b) (8 points) The recursion tree method (b) (2 points) Is T(n) f(n) Explain your answer. (e) (2 points) Solve the recurrence

Assume the facility is up and running with everything you need to install and configure the network devices. Your completed strategy should include the following: Describe the main organizing bodies for RFID standards. Identify and describe those organizations that set standards for RFID. Describe the ISO- and IEC-appropriate standards most

An organization wants to set up a computer network with the following elements. Note down and describe TEN (10) features of the network topology in Figure 1.

A LL F IP E Figure 1 Network Topology Icons I B G C D 000000 L H

In this problem, we will investigate the worstcase running time for the following code snippet. Assume evaluating a function f(i) in the pseudocode below takes (i) time. 1. i 1 2. sum 0 3. for i 1 to n 4. sum f(i) What is the running time expressed in asymptotic notation Justify your answer.

Discuss how the standards and practices performed by the Final Exit Network differ from those standards set forth in the Oregon Death With Dignity Act. What ethical and legal issues were created by the deviations in practice here by the Final Exit Strategy? Do you think that organizations like the Final Exit Strategy should have a place in legal

2. Consider the following relation and the set of functional dependencies (FDs) R (A B C D E F G H I J K) CG AEFBJ DE GJ JAC FDGI AFB DJ G HABF BGH AC D a. Find the minimal cover of FD set (15 pts). Justify your solution. b. Find the candidate key(s) of R (15 pts). c. Identify the best normal form that R satisfies (5 pts). Justify your answer. d.

(a) Sockets data structure are created and terminated during the execution of a message passing program. Briefly explain how a socket is terminated. 4 marks (b) A clientserver model is generally used to describe communication between two computers in a network. Draw the diagram that shows operation of the client server model using socket. 8 marks

Write a program "secret.c" including two functions ("sender" and "receiver") that communicate via external variables. Sender takes a message (a string) and saves it to the external variable secret. The message is less that 100 characters long. The receiver converts the secret to an integer and returns it. Thus the two functions share information

Heres a copy of the starter code include char secret100 void sender(char message) Your codes here int receiver(void) Your codes here int main(void) char str100 scanf( s,str) sender(str) int result receiver() printf(d, result) return 0

The sender in a communication system needs to send the OK message using HAMMING code for error detection and correction. O is represented as 11001111 and K is represented as 0 100 1011. Determine the 4Parity bits for each character and insert them into the data message to be sent. P4 P2 P1 P4 P3 P2 P1 1 100 1 11 P3 1 0 1 0 0 1 K 0 1 1

5. Show that the regular languages are closed under the following operation. (L) E there exists y E with ly a such that ry L.

A host in an IPv6 subnet is to be assigned an IPv6 address. The global routing prefix (aka network id ) assigned to this subnet is 3A00:006E:C000/48. The subnet id assigned to this subnet is A2. The subnet size is /64. The interface id assigned to this host is 1. Write out the IPv6 address of this host using full zero compression.

Consider a CSMACD network, running at 10Mbps, interconnecting 5 computers (A to E) as in Figure 1. In Region 1, three computers (A, B, C) are connected to the hub R1 with a cable of length 1Km (one way) as shown in the figure, while in Region 2, two computers (D and E) are connected to R2 with a cable of length 1Km (one way) as well. R1 and R2 are

How would you summarize the networks listed below 20010db82a3e 449064 20010db82a3e4a1b64 20010db82a3e4ff264 20010db82a3e 4c5b64

You are the IT administrator for a small corporate network. The company has obtained the registered globally unique IPv6 48 network address 262014F045EA. You need to configure your server with this address so you can begin testing IPv6 in your internal network. This is your second network, so you will use a subnet address of 0002. Your network

A host launches three IP datagrams that are 1184 bytes, 1180 bytes, and 487 bytes. The MTU of the directly attached network is 1320 bytes, but the next-hop network has an MTU of just 500 bytes. Indicate how the packets will be fragmented and what the values of the Offset feld will be for all of the fragments. For this problem, do not worry about

Suppose that a packets payload consists of 10 eightbit values (e.g., representing ten ASCII encoded characters) shown below. (Here, we have arranged the ten eightbit values as five sixteenbit values) 11011110 10000101 10011101 10011101 11110101 00001000 10011011 11111111 11110000 01001011 Compute the twodimensional parity bits for each of the five

14. Given the network of bridges in figure, and assuming that LAN ports on C, D, E, H, I, J are 100 Mbs (cost 19 for ports) except for ports on A, B, F, G, K which are 10Mbps LANs (cost 100 for ports) E G A B2 B3 B6 D B5 B1 B4 87 F H B K Draw the obtained spanning tree and circle the blocking state ports. HINT list in detail with payload the

Describe how you use TCP Dump to list all of the interfaces available to capture traffic and list the available interfaces in the lab. What is the TCP Dump flag that is used on the Linux command line to specify the output file name to write the resulting output? What is the purpose of using the "sudo" command in the lab? What is the full TCP Dump

6. XYZ company would like to subnet its network such that, there are 4 separate subnets. They will need 60 computers in each subnet. Compute each of the following. Subnet mask 255.255.255. Subnet 1st Subnet 2nd Subnet NW address 205.100.20. 205.100.20. Host Address 205.100.20. 205.100.20. 205.100.20. 205.100.20. to Broadcast Address 200.100.20. to

You are the network administrator for XYZ inc. Corporation. The company has 3 departments, you can divide network based on departments Sales, Marketing, and Human Resources. You want to use the address 223.1.16.023 to create 3 subnets, one for each department. Each department has the following number of hosts Sales has 250 hosts Marketing has 106

1. LAN A An organization want to make two LANs in Riyadh city. In the LAN with network ID 200.20.10.0 with 24, network administrator wants to design 2 subnets (subnet X and subnet Y) in the network. Subnet X needs 55 computer addresses and Subnet Y needs 12 computers addresses. Design the subnets X and Y with Subnet mask Range of Valid hosts

Consider the DNS iterative query as shown in the picture below. Suppose the round-trip time (RTT) between the computer bit.vt.edu (and any other computer in vt.edu) and its local name server, jeru.cns.vt.edu, is 10 milliseconds, and that the RTT from dns.vt.edu to any other Internet site is 100 milliseconds. The local DNS server cache at

N root DNS server tl local DNS server jeru.cns.vt.edu 1 8 requesting host bit.vt.edu 3 4 5 7 TLD DNS server 6 authoritative DNS server ns1.dns.ucla.edu seas.ucla.edu

1. Determine the range of valid host addresses of 222.24.48.6426 3 2. Determine the broadcast address of 222.24.48.6426 3 3. Determine the range of first two possible subnetted networks of 222.24.48.6426 (222.24.48.) 3 4. Determine the broadcast address of 140.11.10.023 3 5. Determine the range of first TEN possible subnetted networks of

Ally runs Vitotec, a small nutritional company that supplies nutrition and vitamins to gyms. Ally employs a small team, including some office, sales, and warehouse staff. A few times a year, Ally attends trade shows and visits manufacturers to learn about new products. Ally uses an outside delivery service to deliver orders to their gyms. Your

You are the network administrator of an organization where you have five departments Accounts, Sales, Marketing, Production and Store. Different departments have the following number of employees Departments Number of Employees 5 12 14 15 3 SI. 1 Accounts 2 Sales 3 Marketing Production 4 5 Store You have a network 192.168.10.025 and you need to

Let f(x) e 2 cos(12) (A). Show that f has a root in the interval 1, 4. (B). Matlab Use Newtons iteration to find the root of f with tolerance 100. Print out the table of errors and step numbers. Choose to 1 as the initial guess. Turn in the Matlab codes, the solution, and the error table. You can calculate the exact solution r using the Matlab

4. Implementing Gradient Descent. In this question you will implement gradient descent for an easy problem convex quadratic functions. Consider the problem min f(x) Qxqx. where Q is a (strictly) positive definite matrix, i.e., it is symmetric and all its eigenvalues are strictly positive. (a) Compute the gradient Vf(x). (b) Implement gradient

1. Given the IP Address of 202.22.22.171 and a subnet mask of 27 bits, find the network address, the number of host addresses and the subnet mask. 2. Given the subnet mask of 255.255.255.240 and the host address of 220.20.20.97, find the subnetwork identifier and broadcast address of the subnet for this host. 3. Given the subnet mask of

Acme Brick Company uses the following rule to determine whether materials usage variances should be investigated: A materials usage variance will be investigated when the variance is greater than either $5,000 or 10 percent of the standard cost. During June, the company purchased and used 9,500 pounds of concrete for $5 per pound. It was able to

Acme Paper Company is looking to expand its operations and is considering purchasing Pretty Paper, Inc. Acme currently has debt outstanding with a market value of $150 million and a YTM of 9%. Acmes market capitalization of $450 million and the required return on equity is 10%. Pretty Paper, Inc. currently has debt outstanding with a market value

Create two sub interfaces, for VLANs 10 and 20. - Enable dot1q trunking for each sub interface. Using VLSM, split 172.16.0.0/24 into 64 further subnets on Newton and 16 on Einstein further subnets. VLAN 10 will be in Subnet 0, VLAN 20 will be in Subnet 1. Create suitable interface IP addresses and subnet masks to reflect this configuration

Your friend has been operating a small chocolate chip cookie making bakeshop out of their home in a rural location in Ontario. It is so successful (they even have international sales) that he has decided he needs to expand. With that expansion he has hired an additional 5 employees and plans to hire 25 more in the next 6 weeks. He knows how to

Sydney School of Business and Technology is an Registered Training Organisation (RTO) and has been located in Burwood, NSW. The college is catering a number of courses for international students. As per the operational plan of the RTO, the management has started working on improving Wide Area network. You have been working as ICT Manager and have

a. Complete the following table of equivalent, unsigned quantities. Octal Binary (Base 2) (Base 8) 0 0 10101111011 b. Complete the following table of equivalent quantities. Decimal 8 Bit Binary (signed) 8 Bit Binary (2s Compliment) (Base 10) 1 64 128 2049 Decimal (Base 10) 0 243 16 Bit Binary (signed) Hexadecimal (Base 16) 0 FF 16 Bit Binary (2s

In this problem, we will develop a new algorithm for finding minimum spanning trees. It is based upon the following property Pick any cycle in the graph, and let e be the heaviest edge in that cycle. Then there is a minimum spanning tree that does not contain e. (a) Prove this property carefully. (b) Here is the new MST algorithm. The input is

A noninverting amplifier circuit has R18k2, and R100k2. The gain bandwidth product fT 1 MHz. What is the bandwidth of the closed loop amplifier (Provide answer in kHz, eg, for 100kHz, enter 100) V. in R M R Vo

The message signal m(t), whose spectrum M(f) is shown below, is passed through the system shown in that figure. m(t) y(t) x(t) Square Law Bandpass YEEKE Filter M (f) os2 fot x(t) Device W cos2nfot W Y (t) Y3 (t) Lowpass Filter Y4 (t) The bandpass filter has a bandwidth of 2W centered at fo, and the lowpass filter has a bandwidth of W. Plot the

A binary signal is transmitted along a twisted pair of copper wires, with a potential difference of 1 V representing binary 0 and a potential difference of 1 V representing binary 1. This signal is affected by thermal noise, which can be assumed to follow a Gaussian distribution. You can assume that the noise level is not a function of frequency.

b) A pulse p(t) whose spectrum P(f) is shown below satisfies the Nyquist criterion. If the transmission bandwidth BT 2.1 MHz (i) determine the maximum rate at which binary data can be transmitted by this pulse using the Nyquist criterion. (ii) Calculate the rolloff factor r. (iii) What is the transmission bandwidth if r 0 P 10 05 Figure 1 1.1

a) Give an O(n)time algorithm for computing the height of each node in a tree T and the height of T itself, where n is the number of nodes of T. Assume the existence of methods set Height (v,h) and get Height (v) that run in O(1) time. Design algorithms for performing the following operations on a binary tree T of size n, and analyze their

Show that 4n37n 2n5 is 0 (n). Justify your answer by providing real valued constant (s), corresponding to the lower and upperbound constant factors d and c, respectively, and the integer constant no 2 1, consistent with the definition of bigTheta. (Show your work. The provided constants c, c, and no should follow clearly from your work and be

Consider the training set given below, where X, X2, X3 and X4 are attributes and Y is the target value. Y X X X3 X4 1 0 1 0 1 1 1 1 0 1 0 1 1 0 1 1 1 1 1 1 0 1 0 0 0 1 0 0 1 0 1 0 0 0 0 0 0 1 0 1 1 0 0 1 0 0 1 1 a. (Group work) Implement the ID3 algorithm and show what tree results. Please make sure that you are implementing ID3 and are not using

Consider an OFDM system operating in a channel with coherence bandwidth B. 10 KHz. (a) Find a subchannel symbol time Ty 1BN 107m, assuming Tm 1Be. This should insure flatfading on the suchannels. (b) Assume the system has N 128 subchannels. If raised cosine pulses with 3 1.5 are used, and the required additional bandwidth due to time limiting

Consider the following heap 40 77 78 70 80 36 75) 42 (53) 14 25 50 11 45 Show the resulting tree of calling extract max on the above heap (only fill in numbers which were changed from the above figure and cross off the node that will be deleted)

4. Given the circuit below with RI 1K and Rext5K determine the following a. Bandwidth0.1GHz N b. Bandwidth0.1MHz c. Bandwidth1KHz VN RI 2 Rext To Antenna,1. Given the circuit below with RIRext52 determine the following a. Bandwidth0.1GHz N b. Bandwidth0.1MHz c. Bandwidth1KHz VN 32 RI 2 Rext To Antenna

A periodic message signal m(t) as shown in the figure below is transmitted as an anglemodulated signal. The modulation system has o2710 radsec. Let the signal bandwidth of m(t) be approximated by its own fifthharmonic frequency. (a) Find the Bandwidth of the frequency modulation signal assuming k207. (b) Find the Bandwidth of the phase modulated

A communication system transmits audio messages using a telephone line with a particular bandwidth. The audio messages have a different bandwidth than the telephone line. Answer the following questions a. If telephone line has a bandwidth of 5 KHz, and audio messages have a bandwidth of 4 KHz. Define channel bandwidth (Bc), signal bandwidth (Bs),

Suppose Eve knows that the plaintext is aaaaaaaa and Eve has inter cepted the ciphertext. For each of the following cipher systems state whether or not Eve can determine the key. Justify your answer. (a) shift cipher (b) affine cipher (c) Hill cipher with a 2 x 2matrix.

Determine which, if any, of the following functions have the properties of power spectral density functions. Justify your determination. (a) X(f)8(f) cos 2mf (b) X(f)108f10) (c) X() exp(2m f10) (d) X() exp2m(f10)

Consider the FM radio frequencies between 89 and 93 MHz. (Remember that the bandwidth of an FM radio station is 200 KHz.) Seven Orlando stations operate in this range: WLAZ WPIO WUCF WMFE WKES WPRK WWKA 89.1 FM 89.3 FM 89.9 FM 90.7 FM 91.1 FM 91.5 FM 92.3 FM a) What are the smallest and largest frequencies transmitted by WKES FM? b) How many more

The power spectral density (PSD) of a signal x(t) is given below. 6 2 Px(f) (WattHz) 32 12 1 0 1 a) Find the 3dB bandwidth of this signal. b) Find the Equivalent noise bandwidth of the signal. 2 3 4 20 Marks 15 Marks 5 6 7 8 f (Hz)

Consider the following system which consists of a differentiator (HDif (f) j2nf ), a lowpass filter HP (f) with bandwidth of 5 KHz and an upconvertor with carrier frequency of 250 KHz. LP Smin (f) HDi (f) d dt Sndif (f) H, (f) LP Ideal LP Filter BW 5KHz SALP (f) cos(27ft) X Srout (f) A white noise with double sided power spectral density of Sin

Define bandwidth efficiency? Then calculate the bandwidth efficiency for M- ary PSK and M-ary FSK for M=2 ,4 , 8, 16 ,32 , and 64 ? After that explain which of these two schemes is better in term of bandwidth efficiency?

Design a protocol that will establish a new shared secret key K between Alice and Bob without help of a third party. You can use any symmetric cryptographic mechanisms, but at the end of the protocol the following conditions must be met Mutual authentication of Alice and Bob. . The protocol must provide key agreement. Explicit key authentication.

Given the power spectral density of a bandpass signal as shown below, find Gx(f) 0.1 9 10 11 a. Halfpower (or 3dB) bandwidth answer 1KHz b. Absolute bandwidth answer 2KHz c. Bandwidth containing 50 of the total power answer 0.586 KHz d. Bandwidth containing 90 of the total power answer 1.367 KHz A signal has an autocorrelation function RX(T) A 2 2

An amplifier has midband gain of 125 and a bandwidth of 250 kHz. (i) (ii) If 4 negative feedback is introduced, find the new bandwidth and gain If bandwidth is restricted to 1 MHz, find the feedback ratio.

For the circuit shown below (a) (5pts) Find the dcloopgain (b)(10pts) Find the unity gain bandwidth and phase margin of the loopgain using the approximation with gain bandwidth product. (c) (10pts) Find the unity gain bandwidth of the loopgain using the rootsumofsquares formula and the exact calculation. Compares the results with the unity gain

Write a python program in which bandwidth between 4 hosts (given as below) into a dictionary and a function to return the bandwidth of a link, when link is passed as a parameter. Links have bandwidth as following {(1,2):10Mbps, (2,3):5Mbps, (3,4):10Mbps} For example, Input: Enter the link: (2,3) Output should be: Bandwidth for link between h2 and

Bob wants to send Alice a large message m. 1) Design a protocol that only uses secret key cryptography to protect the confidentiality and integrity of the message, assuming that Alice and Bob already share a secret key k beforehand. Give the format of the message (i.e., message components) sent from Bob to Alice. 2) Design a protocol that could

Alice wishes to transfer a short message K to Bob secretly. She chooses a large prime number p, and selects a random number a with gcd(a,p1) 1. Bob selects a random number b with gcd (b, p 1) 1. 1) Alice sends K Ka (mod p) to Bob. 2) Bob sends K K (mod p) to Alice. 3) Alice sends K3 K (mod p) to Bob. Show that at the end of this protocol,

An organization is granted a block of IP addresses, with the starting address of 200.150.224.026. The organization needs to have multiple subblocks of addresses to use in its subnets. One of the subblocks require 58 host IP addresses, which is the maximum requirement among the subblocks. Assume that Classless IPv4 addressing scheme is used with

Analyze the advantages and disadvantages of using cloud storage. Include in your security concerns, costs, and a comparison between two different cloud storage offerings. Which company offers the better arrangement? Why? Explore one other area of cloud computing, such as SaaS (software as a service), and determine how the service might benefit the

You are a network engineer at an organization and you are provided with the network design described in Figure 1. You are allocated the following address space 10.0.0.025 and you are tasked as a network engineer to subnet the allocated address space into the following requirements (a) (5 points) subnet A should accommodate at least 50 assignable

1. A computer register is required to capable of storing an unsigned binary integer of 64578310. Use logs to calculate the required register size. 1. Discuss why 2s compliment arithmetic is used in preference to signed or 1s compliment arithmetic. Give examples to illustrate your answer. 1. Discuss why computers make a distinction between floating