08 Jul Home > Programming > IT computer science
Home > Programming > IT computer science
IT computer science
All interaction on Studypool is 100% anonymous. Username has been changed to protect this user’s privacy
Anonymous
label
Programming
timer
Asked: Feb 28th, 2018
account_balance_wallet
$20
Question Description
Read the attached instruction before a answering the question
Question 1 (30 marks)
This question allows you to demonstrate your ability to carry out calculations such as those introduced in Block 3 Parts 1 and 2 and the Using Numbers (maths) booklet.
In each case you should demonstrate how you worked out your answer, as well as giving the answer. You must show your working to gain full marks. In each case about half of the marks awarded are for a clear explanation of your working.
a.You saw in Part 1 of Block 3 that frequency is the number of cycles per second and period is the duration of a cycle.
i.If a sine wave completes one cycle in 5µs, how many cycles are completed in 1 second?
ii.Give your answer in scientific notation.
(5 marks)
b.Convert the following hexadecimal MAC address to binary form (as shown in the ‘Using Numbers (maths)’ booklet): AB-34-E5-F0-28-CA (9 marks)
c.Convert the following binary IP address to dotted decimal form (as shown in Block 3 Part 2): 00001010.01100011.01011000.01001101(8 marks)
d.How many possible host addresses are available for:
i.an IPv6 address?
ii.an IPv4 address where the first octet is reserved for network addresses? Express your final answer in scientific notation to four significant figures.
(8 marks)
Question 2 (30 marks)
a.
i. Explain how an ad hoc wireless area network differs from an infrastructure wireless area network. The maximum word limit for Question 2a (i) is 75 words.(5 marks)
ii. What characteristics of ad hoc networks in general, and Zigbee specifically, make this sort of network especially suitable for home automation, particularly where some devices on the network might be battery powered? The maximum word limit for Question 2a (ii) is 100 words.(5 marks)
b.
i. At 100m from the antenna of a cellular base station in open country, measurements show that the power per square metre is 400µW/m2. What power per square metre could be expected at 200m from the base station? Show your working and explain any assumptions you make. (5 marks)
ii .A base station is located in an urban environment, and the power per square metre at 100m is measured to be 4µW/m2. What would be a reasonable value to expect at 200m? (You will have to make an assumption to calculate your answer. State the assumption you make.) (5 marks)
iii. In parts (i) and (ii) of this question you looked at signal attenuation caused by increasing distance from a base station, and also by environmental factors. Briefly explain the problem that signal attenuation leads to in digital communications and the techniques that can be used to remedy the effects of signal attenuation. Then give a concise outline of how signal attenuation is put to beneficial use in cellular communications. The maximum word limit for Question 2b (iii) is 200 words. (10 marks)
Our website has a team of professional writers who can help you write any of your homework. They will write your papers from scratch. We also have a team of editors just to make sure all papers are of HIGH QUALITY & PLAGIARISM FREE. To make an Order you only need to click Ask A Question and we will direct you to our Order Page at WriteDemy. Then fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Fill in all the assignment paper details that are required in the order form with the standard information being the page count, deadline, academic level and type of paper. It is advisable to have this information at hand so that you can quickly fill in the necessary information needed in the form for the essay writer to be immediately assigned to your writing project. Make payment for the custom essay order to enable us to assign a suitable writer to your order. Payments are made through Paypal on a secured billing page. Finally, sit back and relax.
About Wridemy
We are a professional paper writing website. If you have searched a question and bumped into our website just know you are in the right place to get help in your coursework. We offer HIGH QUALITY & PLAGIARISM FREE Papers.
How It Works
To make an Order you only need to click on “Order Now” and we will direct you to our Order Page. Fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Are there Discounts?
All new clients are eligible for 20% off in their first Order. Our payment method is safe and secure.