Answered Essay: Note: Where applicable, units of the solution must be correct for full credit.

IT 420

Fall 2017

Homework 1

Note: Where applicable, units of the solution must be correct for full credit.

Answer the following questions concerning chapter 1:

1.1 As a message moves from the network interface layer up to the application layer in

the receiver, headers are ______ .

a. added            b. removed      c. rearranged   d. modified

1.2 Which pair of layers are peer layers?

a.        Application layer in the sender and transport layer in the sender

b.Application layer in the receiver and transport layer in the receiver

         Application layer in the sender and application layer in the receiver

d.Application layer in the sender and transport layer in the receiver

1.3 Which of the following data units is directly encapsulated in an internet layer packet?

a.A TCP segment                              b. A network interface layer frame

c.   A physical layer connection           d. An application layer message

1.4 Choose which layer each of the following phrases describes:

a. Application     b. Transport    c. Internet       d. Network Interface e. Physical

______ Interacts with the user

______ Uses physical (MAC) addresses


______ Uses IP addresses

_______ Encodes data using physical phenomena, such as changing voltage


______ Uses ports for process to process communication


______ May use cabling or wireless connections


______ Host to host communication

_______Sends information across a single network

Assume a five layer TCP/IP model. The initial data at the application layer is A bytes. A B byte header is added at the transport layer, a C byte header is added at the internet layer and a D byte header is added at the network interface layer. The network interface layer also adds a E byte trailer. Express the answers to the questions below in terms of A, B, C, D, and E.

How many total bytes are sent to the hardware?

What percentage of the bytes sent to the hardware is the original application layer data?

What percentage of the bytes sent to the hardware is overhead?

3.In the five-layer networking model, data sent to the physical layer consists of the application data, network interface layer header, network interface layer trailer, internet layer header, and transport layer header. In the diagram of data sent to the physical layer below, label each part using one of the terms above. (Order matters.)


4.Perform the following calculations. Make sure the units of the solution are correct.

a.10 Kbps * 3

b.10 Mbps * 3 sec

c.Convert 2400 bits to bytes

5.Answer the following questions concerning analog signals:

5.1 As the period of a sine wave decreases, the frequency __________________ .

a. decreases b. increases     c. remains the same     d. doubles

5.2 The frequency of a sine wave is defined as:

a.the number of cycles per second

b.the maximum amplitude of the wave

c.the time for one cycle

d.the difference between the high frequency and the low frequency

6.Consider the following sine wave: s(t) =   4sin(2π3t + π)

a.What is the amplitude?

b.What is the frequency?

c.What is the phase?

7.Draw the following sine wave in the time domain, showing amplitude and phase:

s(t) = 3sin (2π2t + π)

8.A sine wave has a period of 5 msec. What is the frequency?

9.What is the period of a 2 KHz sine wave?

10.Consider the following composite signal.

f(t) = 5sin(2π2t) + 6sin(2π3t) + 7sin(2π4t)

a.Graph this in the frequency domain, showing amplitude and frequency

b.Assuming the frequency is in Hertz, what is the bandwidth for this signal?

11.A composite signal has a bandwidth of 150 KHz. The component sine wave with the highest frequency is at 250 KHz. What is the frequency of the component sine wave with the lowest frequency?

12.What is a possible unit for each measurement?

a.Frequency                         ___________________

b.Period                                ___________________


d.Analog Bandwidth

Expert Answer




Added, When the message moves from lower layer to upper layer a header is appended which contains the information structure of the data to flow.


d) Application layer in the sender and transport layer in the receiver.


A TCP segment, TCP accepts data from the data stream and divide it into chunks and a TCP header is added and then TCP segment is encapsulated into IP datagram.



Application layer interacts with the user,


Transport layer sends information across single network


Internet, host to host communication.


Network interface layer, uses ip addresses


Physical layer, May use cabling or wireless connections

Buy Essay
Calculate your paper price
Pages (550 words)
Approximate price: -

Help Me Write My Essay - Reasons:

Best Online Essay Writing Service

We strive to give our customers the best online essay writing experience. We Make sure essays are submitted on time and all the instructions are followed.

Our Writers are Experienced and Professional

Our essay writing service is founded on professional writers who are on stand by to help you any time.

Free Revision Fo all Essays

Sometimes you may require our writers to add on a point to make your essay as customised as possible, we will give you unlimited times to do this. And we will do it for free.

Timely Essay(s)

We understand the frustrations that comes with late essays and our writers are extra careful to not violate this term. Our support team is always engauging our writers to help you have your essay ahead of time.

Customised Essays &100% Confidential

Our Online writing Service has zero torelance for plagiarised papers. We have plagiarism checking tool that generate plagiarism reports just to make sure you are satisfied.

24/7 Customer Support

Our agents are ready to help you around the clock. Please feel free to reach out and enquire about anything.

Try it now!

Calculate the price of your order

Total price:

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.


Let us write that nagging essay.


Submit Your Essay/Homework Instructions

By clicking on the "PLACE ORDER" button, tell us your requires. Be precise for an accurate customised essay. You may also upload any reading materials where applicable.


Pick A & Writer

Our ordering form will provide you with a list of writers and their feedbacks. At step 2, its time select a writer. Our online agents are on stand by to help you just in case.


Editing (OUR PART)

At this stage, our editor will go through your essay and make sure your writer did meet all the instructions.


Receive your Paper

After Editing, your paper will be sent to you via email.