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Phy301 GDB

Wednesday, June 29, 2011 Posted In Edit This
Do you agree that Temperature has significant effect on most of the Diode characteristic? Elaborate your answer by describing the effect of temperature on diode when diode is in Forward biased mode and when in Reversed biased mode.

Mgt111 GDB No. 3 - solution soon

Wednesday, June 29, 2011 Posted In Edit This
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

CS601 Assignment No. 5 solution

Wednesday, June 29, 2011 Posted In Edit This
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.

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CS507 Graded GDB solution

Wednesday, June 29, 2011 Posted In Edit This
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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