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CS610 Assignment No. 3 Solution

Monday, June 06, 2011 Posted In Edit This
CS 610 Computer Networks
Assignment # 03
Spring 2011
Total Marks = 20

Deadline
Your assignment must be uploaded / submitted before or on June 7, 2011

Upload Instructions
Please view the assignment submission process document provided to you by the Virtual University.
Rules for Marking
Please note that your assignment will not be graded if:
• It is submitted after due date
• The file you uploaded does not open
• The file you uploaded is copied from someone else or from internet
• It is in some format other than .doc
Objective
The assignment has been designed to develop the understanding about the concept of Classless and Classful IP addressing.
Note: Material that is an exact copy from handouts or internet would be graded
zero marks. Your solution should consist of the material found through different sources and written in your own words.
Assignment Statements:


Q1: Star organization is using five classless and classful IP addresses in its network. Network engineer wants to compute all the entries which are given in the table. Please fill all entries and mention which methods are used for computing all these entries. (Write only the names of methods). In last row proper steps are required for binary conversion.
[CENTER DIR=LTR]
Address
9.1.4.5/16
145.24.102.1/24
201.16.1.100/24
137.41.102.1/22
193.11.11.100/27
9.1.4.5/16
Methods
Mask
Number of
Network
Bits
Number of
Host Bits
Number of
Subnet Bits
Number of
Hosts Per
Subnet
Class of address
Change address into binary notation
:::::::::::::::::::::::::
Address
9.1.4.5/16, 145.24.102.1/24, 201.16.1.100/24, 137.41.102.1/22, 193.11.11.100/27, 9.1.4.5/16
Methods for each IP
1. Mask
2. Number of
Network
Bits
3. Number of
Host Bits
4. Number of
Subnet Bits
5. Number of
Hosts Per
Subnet
6. Class of address (Calculations Required for each IP)
7. Change address into binary notation (Calculations Required for each IP)
::::::::::::::::::::::::::::::::::
Net work calculator: http://www.subnetmask.info/
http://www.ipaddresslocation.org/cgi-bi ... t-mask.cgi

IP Address: 145.24.102.1/24, Write its mask,no: of network bits,no: of subnet bits,no: of host per subnet?

The /24 tells you that all of the last byte is used for node address and the first 3 bytes for network address. Therefore mask is 255.255.255.0 and its a class C address.

24 its 24bit subnet mask...

255.255.255.0
255 = 8bits
and 8*3 = 24 bits
and last 0 is not counted

Address: 145.24.102.1 10010001.00011000.01100110. 00000001
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Wildcard: 0.0.0.255 00000000.00000000.00000000. 11111111
=>
Network: 145.24.102.0/24 10010001.00011000.01100110. 00000000
HostMin: 145.24.102.1 10010001.00011000.01100110. 00000001
HostMax: 145.24.102.254 10010001.00011000.01100110. 11111110
Broadcast: 145.24.102.255 10010001.00011000.01100110. 11111111
Hosts/Net: 254 Class B

HRM627 Online Quiz No. 3 announcement

Monday, June 06, 2011 Posted In Edit This
Opening Date and Time: June 08, 2011 At 12:01 AM (Mid-Night)

Closing Date and Time: June 10, 2011 At 11:59 PM (Mid-Night)



For all PAST SOLVED ONLINE QUIZZES, visitVUsolutions GURU

Fin630 Online Quiz No. 3 Announced

Monday, June 06, 2011 Posted In Edit This
“Investment Analysis and Portfolio Management (Fin630)”

This is to inform that Quiz No.3 (covering video lecture no. 01 to lecture no. 27) will be uploaded on VULMS according to the following schedule

Schedule

Opening Date and Time 
June 07, 2011 At 12:01 A.M.(Mid-Night)

Closing Date and Time 
June 09, 2011 At 11:59 P.M.(Mid-Night)

24 hours extra time is not available

For all PAST SOLVED ONLINE QUIZZES, visit VUsolutions GURU

STA630 Online Quiz No. 3 Announced

Monday, June 06, 2011 Posted In Edit This
Online Quiz # 03


All Students of Spring Semester 2011 are informed that Online Quiz # 03 for “Research Methods (STA630)” will be uploaded according to the following schedule:



Opening Date and Time June 06, 2011 At 12:01 AM



Closing Date and Time: June 08, 2011 At 11:59 PM



Read the following instructions carefully before attempting the Quiz.



1. Quiz will be based upon Multiple Choice Questions (MCQs) from Lesson # 01 to Lesson # 28.
2. Quiz will start on May 05, 2011 and will end on May 06, 2011.
3. You have to attempt the quiz online. You can start attempting the quiz any time within given date(s) and time of a particular subject by clicking the link for Quiz in LMS.
4. Each question has a fixed time of 90 seconds. So you have to save your answer before 90 seconds. But due to unstable internet speeds, it is recommended that you should save your answer within 60 seconds. While attempting a question, keep an eye on the remaining time.
5. Attempting quiz is unidirectional. Once you move forward to the next question, you can not go back to the previous one. Therefore before moving to the next question, make sure that you have selected the best option.
6. DO NOT press ‘Back’ button while attempting a question; otherwise you will lose a question.
7. DO NOT refresh the page unnecessarily.
8. DO NOT try to disable “JavaScript” in your browser; otherwise you will not be able to attempt the quiz.
9. If for any reason, you lose access to internet (like power failure or disconnection of internet); you will be able to attempt the quiz again from the position where you left in last attempt. But remember that you have to complete the quiz before expiry of the deadline.
If any student failed to attempt the quiz in given time, then no re-take or offline quiz will be held.

For all PAST SOLVED ONLINE QUIZZES, visit VUsolutions GURU

CS507 Assignment No. 3 solution

Monday, June 06, 2011 Posted In Edit This
Question:
Assume the working phenomenon of www.amazon.com, while considering their shopping cart mechanism in mind; draw the ‘Data Flow Diagram’ for a specific department with respect to a customer?



Hint: Visit www.amazon.com and consider acceptable assumptions regarding online sales mechanism. Use Microsoft Word or Microsoft Visio for drawing DFD.

Note: You have to draw the complete diagram with proper labeling

Last Date 9June, 2011


:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::


Solution:



DFD specifies only what processes are performed and not how they are performed it is easily understood by a nonprogramming user. 

Context Level Diagram: 
A diagram giving an entire system’s data flows and processing with a single Process (circle) is called a context diagram. A context diagram is expanded into a number of inter-related processes. Each process may be further expanded into a set of inter-connected sub processes. This procedure of expanding a DFD is known as levelling.






:::::::::::::::::::::::::::::::::::::::::::::::::
Data Flow Diagram"A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system."
The purpose of data flow diagrams is to provide a linking bridge between users and systems developers.


The data flow diagrams are:
• Graphical, eliminating thousands of words;
• Hierarchical, showing systems at any level of detail; and
They have less jargon, allowing user understanding and reviewing. Data flow diagrams facilitate users to understand how the system operate. DFD’s also help developers to better understand the system which helps in avoiding delays in proper designing, development, etc. of projects.
Rules for DFD’s
The DFD as an analytical tool follows certain rules. These rules help in achieving the level of standardization.
• There should be no black holes, gray holes, miracles.
• Do not leave things unlabeled
• the DFD should not include data flows that are unassociated with the process





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