Today’s organizations are facing challenges on many fronts. One of these challenges is security of information. NADRA is one of such organizations in Pakistan that has made tremendous efforts to ensure security of information. All employees in organizational hierarchy starting from front desk officer to data entry operator, to manager, ensure that there is no leakage of information to any one in anyway. Therefore, information remains property of only relevant employees.

You are required to identify the concept explained in the above mentioned scenario. Also identify the means and tools by which organizations ensure security of information to bring about maximum effectiveness in its communication processes.

Last date 1st july

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Assignment # 5


Instructions :
Your assignment must be uploaded/submitted before or on 28th June 2011.
• Your assignment must be in .doc format.(Any other formats like scan images, PDF, Zip, rar, bmp, docx etc will not be accepted)
• Save your assignment with your ID (e.g. bc020200786.doc).
• No assignment will be accepted through email.
It should be clear that your assignment will not get any credit if:
• The assignment is submitted after due date.
• The submitted assignment does not open or file is corrupted.
• Your assignment is copied from internet, handouts or from any other student (Strict disciplinary action
will be taken in this case).
Question 1: [5]
How ZigBee is taken as a unique and better wireless technology for the data communication over the internet?


Question 2: [5]
Differentiate between Zigbee and other wireless communication technologies.


Question 3: [5]
How Zigbee technology ensures Reliable and secures data communication in wireless networks?


Note:
• Your answer must follow the below given specifications. Marks will be deducted if you do not follow
these instructions.
• Font style: “Times New Roman”
• Font color: “Black”
• Font size: “12”
• Bold for heading only.
• Font in Italic is not allowed at all.
• You should consult recommended books to clarify your concepts.
• It’s better for you to submit the assignment well before the deadline.
• Do not put any query at MDB about this assignment, if you have any query then email at CS601@vu.edu.pk


Solution:

Question 1: How ZigBee is taken as a unique and better wireless technology for the data communication over the internet?

Answer:

Zigbee technology is unique and better wireless technology for data communication due to following reasons:

1. Its centralization control system reduces the man power.

2. It allows wireless networking to connect several units through one button.

3. It helps to monitor the activities in a better way.

4.  It saves the wireless networking from short circuiting.

5. The ZigBee technology devices are based on low power consumption therefore are

reliable, therefore can run for long duration.

6. Zigbee technology used in the remote control devices helps to control the function at a

specific range.

7. Its Bluetooth application gives a unique feature of transferring information or data

from one place to another in a far better way than Bluetooth itself.

8. The low cost allows the technology to be used widely in wireless control and

monitoring applications.

Q. 2 Differentiate between Zigbee and other wireless communication technologies?

Answer:

ZigBee and Other wireless communication technologies:

Zigbee is designed around low power consumption which increases battery life while others use high power.

Zigbee provides network security and application support services better than others.

It provides low cast in contrast to others high cost.

Using Mesh networking standard it provides reliability and larger range better than any other wireless network.

Zigbee devices use small transmitters for communication with the central computer.

It also publishes application profiles that allow multiple OEM vendors to create interoperable products.

It is the newest and provides specifications for devices that have low data rates, consume very low power.

ZigBee devices are limited to low throughput of 250kbps at 2.4GHz while others provide high data rate i.e. Bluetooth up to 1Mbps and Wi-Fi up to 54Mbps.

Finally it provides remote monitoring and manipulation.

Bluetooth provides high data rate of 1Mbps at 2.4GHz.

Q. 3 How Zigbee technology ensures Reliable and secures data communication in wireless networks?

Answer:

ZigBee technology uses security model of the IEEE 802.15.4 MAC sub layer which specifies following security services:

1. It maintains a list of trusted devices within the network

2.  In this technology encryption standard is increased

2.  It saves data from modifying by different parties..

3. It gives sequential freshness to reject data frames that have been replayed

4. Controller compares the freshness value with the last known value from the device.

The actual security implementation is specified by the implementer using a standardized tool box of ZigBee security software.

for another solution with images: Click here to download solution in MS Word format, CS601 Assignment vusolutions

you may use the following login and password to download on docstoc:

1. user name: vusolutions1

password: mba123

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Graded MDB

Dated: Jun 27, 11Graded MDB Topic All the Students of CS507 are directed to participate in the Graded MDB which will be opened from July 04, 2011 to July 06, 2011. This GMDB has 5% weightage in the final score, so all the students are advised to participate in it. Note: Your answer must not be greater than 100 words. Company Overview: Ibrahim industries Inc. started in 1999 as a whole sale distributor of auto parts. In 2004 the Ibrahim industry expended its business internationally. Today, its annual sales have been increased to 100M$. Current infrastructure of the company: Distributor centers: 10 Retail outlets: 4 Dealerships: 1000 Challenges faced by the Ibrahim industries: Now invoicing, paying to the suppliers, and purchasing have been distributed to the various distributed center. The company wants a perfect accounting system that maintains consistency of the transactions at all the distributed centers. The business information has been maintained on four different ARE (information systems) creating complexity that’s why an integrated solution is required. The number of employees has also been increased so it’s difficult to keep record of every employee at every location and interacting with them. The company needs an online inventory tracking system to interact with 10 distributer centers. As the company has increased its business growth so it also requires a warehouse to take efficient business decisions. The main focus of the company is to handle supply chain management efficiently. Question: As an IT consultant of Ibrahim industries, provide a solution to handle all the challenges. ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: SOLUTION: As the Ibrahim Industries is facing many challenges regarding their overall progress and organizational development they required an “ERP” to achieve their organizational goals where the basic steps involved in development of ERP are Connect Existing modules/system o The concept is to maximize the use of existing systems ali frooq and minimize the changes, because the old systems were built/developed over a number of years encompassing technologies and platforms of various specifications Use Supply Chain Management (SCM) Software o Using SCM software will reduce uncertainty and risks in the supply chain thereby positively affecting inventory levels, cycle time, business processes.

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Social gamming which has gained popularity through games like “Angry Birds” has caught the attention of the telecommunication sector.

According to a survey smartphone sales are expected to reach 200 million a year by 2016 in Asia Pacific. At least 90 percent of gamers will be on mobile in the future. Internet based smartphones are liberating the social gamers from the traditional home and office gaming. Firms client now prefer social games designed for mobile phones rather than Xbox360 or Play Station.

Previously all the gaming projects were concentrated on Play Station or Xbox but now there have been a big change in the industry and most of the projects are transferring to smartphones. Social gamers rather than hardcore videogame players would be the drivers of developer industry growth. The majority of the population is going to be casual gamers and casual gamers are not really that willing to play their games just on the PC.

More than 250 million people a month play Zynga games which also include "CityVille", "FrontierVille", "Café World", "YoVille" and "Vampire Wars." The biggest costumers for Nokia Ovi application store are its gamers.

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Pakistan Telecommunication Company Limited (PTCL) is upgrading its Telephone Exchanges from Time Division Multiplexing (TDM) based technology to latest Next Generation Network (NGN) technology for providing better and improved services to its valued customers.

This is to inform our valued customers that PTCL will start the migration series from Korangi Exchange Area from 3rd July 2011 till-13 July 2011 to streamline and make the service and Hi-tech, utilizing state of art technology.

The customers of Korangi exchange area are being notified that all those telephone numbers with the prefix series 511 and 513 will be migrated on 3-7-2011 from 1:00 am to 9:00 am, 509 on 5-7-2011 from 1:00 am to 9:00 am, 508 on 7-7-2011 from 1:00 an to 9:00 am and 505 and 506 on 9-7-2011 to 13-7-2011 from 1:00 am to 9:00 am. There will be no change in the existing telephone numbers after the migration. There will be minor change of procedure for activation and de-activation of code barring service and other value added services.

PTCL regrets and apologize for any inconvenience and discomfort caused to its customers during the migration. PTCL assures its customers to keep the outrage time as minimum as possible and to provide its customers with uninterrupted, smooth and leveled services.

For any help or assistance customers can call PTCL help desks or call center agents round the clock, on 1236.

PTCL aims to provide its customers with good quality of service and anticipates the customers support during the migration process.

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Assignment#5 Of MTH202 (Spring 2011)

Maximum Marks: 15
Due Date: June 28, 2011

DON’T MISS THESE: Important instructions before attempting the solution of this assignment:
•To solve this assignment, you should have good command over 31 -35 lectures.
• Try to get the concepts, consolidate your concepts and ideas from these questions which you learn in the 31 to 35 lectures.
• Upload assignments properly through LMS, No Assignment will be accepted through email.
• Write your ID on the top of your solution file.
• Don’t use colorful back grounds in your solution files.
• Use Math Type or Equation Editor etc for mathematical symbols.
• You should remember that if we found the solution files of some students are same then we will reward zero marks to all those students.
• Try to make solution by yourself and protect your work from other students, otherwise you and the student who send same solution file as you will be given zero marks.
• Also remember that you are supposed to submit your assignment in Ms-Word format any other like scan images etc will not be accepted and we will give zero marks correspond to these assignments.

Question 1; Mark: 5
A company manager wants to hire 4 people from a group of 10 applicants, 4 men and 6 women, all of whom are equally qualified to fill the position. If he selects the four at random, what is the probability that
i. All four will be women
ii. At least two will be men?

Question 2; Marks: 5
How many ways are there to select a committee to develop a discrete mathematics course at a university if the committee is to consist of four faculty members from the mathematics department and three from the computer science department, if there are 10 faculty members of the mathematics department and 12 of the computer science department?
Question 3; Marks: 5
Suppose that there are 1807 students at university. Of these, 453 are taking a course in computer science, 567 are taking a course in mathematics, and 299 are taking a courses in both computer science and mathematics .How many are not taking a course in either computer science or in mathematics?

SOLUTION:

A company manager wants to hire 4 people from a group of 10 applicants, 4 men and 6 women, all of whom are equally qualified to fill the position. If he selects the four at random, what is the probability that

1. All four will be women
2. At least two will be men?

C(10,4)

=10!/4!(10-4)!

=10*9*8*7*6*! / 4*3*2*1*(6!)

=5040*6*5*4*3*2*1 / 24*6*5*4*3*2*1

=5040*720 / 24*720 =362800 / 17280

=210

C(6,4)

=6!/4!(6-4)!

=6*5*4*3*2*1 / 4*3*(2!)

=720 / 24(2*1) =720/48

=15

C(8,2)

=8! / 2!(8-2)! =8*7*6*5*4*3*2*1 / 2 *1(6!)

=40320 / 2(720)

=28

Question 2;                                                                                                           Marks: 5
How many ways are there to select a committee to develop a discrete mathematics course at a university if the committee is to consist of four faculty members from the mathematics department and three from the computer science department, if there are 10 faculty members of the mathematics department and 12 of the computer science department?

C(12,4).C (10,3)

=12! / 4! (12-4)! . 10! / 3! (10-3)!

=12*11*10*9*8! / 4*3*2*1(8!). 10*9*8*7! / 3*2*1 (7!)

=11880 / 24 .720/6

=495.120

=59400

Question 3;                                                                                                           Marks: 5
Suppose that there are 1807 students at university. Of these, 453 are taking a course in computer science, 567 are taking a course in mathematics, and 299 are taking a courses in both computer science and mathematics .How many are not taking a course in either computer science or in mathematics?

N(U)=1807

N(C)=453

N(m)=567

N(C ∩ m)=299

N(cUm)=?

N(cUm)=n(C)+n (m) –n (C∩m)

=453+567-299

=721

N(cUm)-n(U) –n (cUm)

=1807-721

=1088
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Another solution: Mth302 Assignment vusolution

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Assignment No. 04
SEMESTER Spring 2011
CS301- Data Structures

Total Marks: 30

Due Date: 28/06/2011

Consider the following phrase:

welcome to virtual university

There are total 29 characters in it; 26 alphabets and 3 spaces

• Draw frequency table                    [5 marks]
• Draw Huffman tree                [10 marks]
• Determine Huffman code for each character         [5 marks]
• Encode the above phrase using Huffman codes calculated above [5 marks]
• Encode the above phrase using ASCII codes [5 marks]

Lectures Covered:  This assignment covers Lecture # 25-26

Deadline: Your assignment must be uploaded/submitted at or before 28-June-2011.


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SOLUTION:


Click here to download solution, CS301 Assignment Solution

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