Assignment No. 5 Semester Spring 2012 Data Communication - CS601

Assignment No. 5   Semester Spring 2012 Data Communication - CS601	Total Marks: 20 Due Date: 00-07-2012
Objective: To understand the concept related to the error detection mechanism. Instructions: Please read the following instructions carefully before solving & submitting assignment: Assignment should be in your own wordings not copied from net, handouts or books. It should be clear that your assignment will not get any credit (marks) if: §                     The assignment is submitted after due date. §                     The submitted assignment does not open or file is corrupt. §                     The assignment is copied (from other student or copied from handouts or internet). §                     Student ID is not mentioned in the assignment File or name of file is other than student ID. For any query about the assignment, contact at cs601@vu.edu.pk GOOD LUCK
Q. 1. Suppose a sender sent a word “assignment” for which the receiver received the following binary:  “01100001011010010111001101101001011001110110111001101110011001010110111001110100” By applying the complete process of LRC using even parity, you are required to check that, is the same word received by the receiver or not? Also write the word received by the receiver. Binary Code Alphabet Binary Code Alphabet Binary Code Alphabet Binary Code Alphabet 0110 0001 a 0110 1000 h 0110 1111 o 0111 0110 v 0110 0010 b 0110 1001 i 0111 0000 p 0111 0111 w 0110 0011 c 0110 1010 j 0111 0001 q 0111 1000 x 0110 0100 d 0110 1011 k 0111 0010 r 0111 1001 y 0110 0101 e 0110 1100 l 0111 0011 s 111 1010 z 0110 0110 f 0110 1101 m 0111 0100 t 0110 0111 g 0110 1110 n 0111 0101 u Table 1 HINT: First convert the word “assignment” into binary equivalent with the help of the given table 1. The LRC calculated by the sender is not appended with the given binary. It is also your task to calculate the LRC by yourself. Note: §                     Assignment should be in your own wordings not exactly copied from Internet, handouts or books. §                     Your answer should be “to the point”.

Assignment No. 4 Semester Spring 2012 Data Communication - CS601

Assignment No. 4
Semester Spring 2012
Data Communication - CS601

Total Marks: 20

Due Date: 21-06-2012

Objective: To understand the Guided Media and Satellite Communication

Instructions:

Please read the following instructions carefully before solving & submitting assignment:

Assignment should be in your own wordings not copied from net, handouts or books.

It should be clear that your assignment will not get any credit (marks) if:

• The assignment is submitted after due date.
• The submitted assignment does not open or file is corrupt.
• The assignment is copied (from other student or copied from handouts or internet).
• Student ID is not mentioned in the assignment File or name of file is other than student ID.

For any query about the assignment, contact at cs601@vu.edu.pk

GOOD LUCK

Q. 1. Following table presents different types of frequencies with frequency ranges. You are required to re-arrange the Column B with respect to Column A                                                                   [5 Marks]

	Column A	Column B
Sr. No	Name	Frequency Range
1	VLF	300MHz to 3GHz
2	EHF	30MHz to 300MHz
3	UHF	3GHz to 30GHz
4	VHF	3 KHz to 30KHz
5	SHF	30GHz to 300GHz

Q. 2. Usually Satellite Systems are categorized according to their orbital distance as GEO, LEO and MEO. Compare these satellite systems in the following table according to their features.              [10 Marks]

	GEO	LEO	MEO
Type / Name of Orbit
Distance from Earth (aprx. in miles)
Usage /Application
Time take to complete one cycle around the earth (aprx. in hours)

Q. 3. Suppose a research institute wants to connect its main office with the testing site 2 miles away. The institution wants an economicalsolution using Fiber Optics.

Suppose you are the IT consultant of this institution, considering the above mentioned scenario, answer the following questions.                                                                                                                  [2+3=5 Marks]

a)      Which type / mode of fiber; will you choose to provide an economical solution? ( Just write name)                                                                               

b)     Why will you not choose the other type /mode?  Give Reasons.                                                   

Note:

• Assignment should be in your own wordings not exactly copied from Internet, handouts or books.

• Your answer should be “to the point”.

CS601 Data Communication Assignment solution spring 2012

Solution :


Q. 1. Suppose you have been asked to give a proposal of a Local Area Network for a company which requires easy reconfiguring, efficient in speed and economical in cost network. Considering these three factors, which guided media you will prefer for this type of network? Give three good reasons to support your answer.
(2 Marks for suggestion/name of media and 3 marks for three reasons) [2+3 = 5]
Solution:
Unshielded twisted-Pair (UTP) Cable
Q. 2. Analog signals are considered more prone to Noise as compared to digital signals. Suggest a proper method or technique with its complete steps for a telecommunication company which wants to convert its analog signals in digital signal to avoid from noise.
Note: just name the technique and its steps, detail is not required. [5 Marks]
Solution:
Name of technique “Analog to digital conversion”steps
1: Pulse Amplitude Modulation
2: Pulse Code Modulation
Q. 3. In Data Communication, situations exist where we need to change the Digital Signals into Analog Signals. Select the technique(s) which is/are used by modems for this purpose. Choose all that apply. [10 Marks]
B8ZS
Quantization Amplitude Modulation
Amplitude Shift Keying
Frequency Shift Keying
Frequency Modulation
Frequency Reducing Key
Frequency Division Multiplexing
Phase Shift Keying
Phase Modulation
Quadrature Amplitude Modulation
Manchester Encoding Scheme
4 PSK
Solution:
1. Amplitude Shift Keying
2. Frequency Shift Keying
3. Phase Shift Keying
4. Quadrature Amplitude Modulation

CS601 Assignment # 1 Spring 2012 (19-04-2012)

	Assignment No. 1  Semester Spring 2012 Data Communication - CS601		Total Marks: 15 Due Date: 19-04-2012
Objective: To understand the Network Topologies and some basic concepts of Data Communication. Instructions: Please read the following instructions carefully before solving & submitting assignment: Assignment should be in your own wordings not copied from internet, handouts or books. It should be clear that your assignment will not get any credit (marks) if: The assignment is submitted after due date. The submitted assignment does not open or file is corrupt. The assignment is copied (from other student or copied from handouts or internet). Student ID is not mentioned in the assignment file or name of file is other than student ID. For any query about the assignment, contact at cs601@vu.edu.pk GOOD LUCK
Q 1 Suppose you are installing a new network for a company that is growing rapidly. The current design calls for 28 computers, with expansion to 80 in the next six months. Because of the speed at which the network is expected to grow, you want to make sure that adding new devices in the network and troubleshooting will be as easy as possible. So, considering these factors, which topology you will prefer for this type of network? Give proper reasoning to support your answer. (5 Marks) Q.2 How does the logical topology differ from the physical topology? Can a single physical topology support multiple logical topologies? Answer with proper reasons. (5 Marks) Q 3 Suppose you have been asked to put together a proposal for a new computer network of a company. You have been asked to specifically list the advantages to networking. Of the following equipment the company owns, which devices can be shared on a network? (5 Marks) Choose all that apply: 1.    Keyboard 2.    Mouse 3.    Scanner 4.    Monitor 5.    CD-ROM drives 6.    Light pen 7.    Printer Note: Assignment should be in your own wordings not exactly copied from Internet, handouts or books. Your answer should be “to the point”.

CS601 GDB Solution & Discussion Fall 2011

“Both TCP/IP model and OSI model work in a very similar fashion. But they do have very slight differences too. Knowing these differences is very important in learning computer networking. In your point of view which model is best regarding usage and why? Discuss it.”

A concise, coherent and to the point comment is preferred over lengthy comment having irrelevant details. Your comment must not be more than 8-10 lines. Comments, posted on regular Lesson's MDB or sent through email will NOT be considered in any case. Any request about such an acceptance will not be catered

Read more: CS601 GDB Solution & Discussion Fall 2011 - Virtual University of Pakistan http://vustudents.ning.com/group/cs601datacommunication/forum/topics/graded-gdb-topic#ixzz1k4gU30yA