EE3015 Tutorial 7
(WiFi, VC network and datagram network) Problems: 1. What does it mean for a wireless network to be operating in infrastructure mode? If the network is not in infrastructure mode, what mode of operation is it in, and what is the differen
MA1300
Problem Set # 14, Solutions
1. Determine whether the series converges or diverges.
X
n+1
,
(a).
n n
n=1
(b).
X
(2k 1)(k2 1)
k=1
(k + 1)(k2 + 4)2
,
X
4n+1
(c).
.
3n 2
n=1
n+1
P 1
P
n+1
have positive terms. Since limn n 1 n = 1 and
and
Solution. (
Unit 6 Reading Comprehension (pp.108)
A
Multiple choice:
1.B/ 2.D/ 3.A/ 4.D/ 5.A
B
For and Against
1.
2.
3.
4.
5.
6.
genetic
allergic
pesticides
slip by undiscovered
adequately tested
a public relations exercise
Vocab Practice A: completion
1.
2.
3.
4.
5.
Additional Notes on Unit 2.4
Data Communications
Hamming Distance
Hamming distance is a measure of a codes strength. Given two bit patterns, the Hamming distance is defined as the number of bits that are different in the two patterns. Examples:
Distance b
Unit 1
Basic Concepts
After studying this unit, you will be able to recognize the major components of computer networks, explain how these components work together to achieve data communications.
Basic Concepts
1-1
Outline of Unit 1
1.1 Computer Network a
EE3015 Computer Networks
Lecturer
Dr. Albert Sung Office: G6518 Email: albert.sung@cityu.edu.hk
Course Materials
Course Web Site: Blackboard
All materials will be available in Blackboard
Available soon
A discussion board will be created.
If you have any
EE3015 Tutorial 9 (Transport Layer)
Review Questions: Describe why an application developer might choose to run an application over UDP rather than TCP.
Problems: 1. Suppose Host A sends two TCP segments back to back to Host B over a TCP connection. The f
EE3015 Tutorial 8
(IP address, IP fragmentation, NAT) Review Questions Do routers have IP addresses? If so, how many? What is the difference between routing and forwarding? What is the 32-bit binary equivalent of the IP address 223.1.3.27?
Problems: 1. Co
EE3015 Tutorial 6
(Ethernet and Ethernet Switch)
Problems 1. Suppose nodes A and B are on the same 10 Mbps Ethernet segment, and the propagation delay between the two nodes is 225 bit times. Suppose node A begins transmitting a frame and before it finishe
EE3015 Tutorial 5 (Medium Access Control)
1.
Suppose that the pure ALOHA protocol is used to share a 56 kbps satellite channel, and that frames are 2000 bits long. Find the maximum throughput of the system in frames/second. (Note: the throughput of pure A
EE3015 Tutorial 4
(Go-Back-N and Selective Repeat) Problems: 1. Two hosts communicate with each other using a pipelined protocol with window size equal to w. Let the transmission rate of the link connecting the two hosts be 10 Mbps and the end-to-end dela
EE3015 Tutorial 3
(Data Communications) Review Questions Describe what pulse coded modulation is. What is the difference between multimode step-index fiber and multimode graded-index fiber? Problems 1. An audio digitizing utility in a PC samples an input
Unit 4 Appendix: More on Complex Noun Phrases
Determiners & pre-modifiers
Various kinds of word can appear before a head noun. These can be divided into
two main types: determiners and pre-modifiers.
Determiners include various types:
Determiner
type
Exam
MA1300
Problem Set # 1, Solutions
1. Find the domain and sketch the graph of the function.
G(x) =
Solution:
3x + |x|
x
When x = 0, G(x) has no definition; when x 6= 0, G(x) is well defined. So the domain of G is
(, 0) (0, ). The sketch of G is
y
4
y = G(x
MA1300
Problem Set # 3, Solutions
1. Use the definition of continuity and the properties of limits to show that the function is continuous
at the given number a.
a = 4.
f (x) = x2 + 7 x,
2
2t 3t
,
a = 1.
(2)
f (t) =
1 + t3
Proof. (1), since limx4 7 x = 3
MA1300
Problem Set # 3
1. (P91, #1.8.12, 1.8.14) Use the definition of continuity and the properties of limits to show that the
function is continuous at the given number a.
a = 4.
f (x) = x2 + 7 x,
2
2t 3t
f (t) =
,
a = 1.
1 + t3
(1)
(2)
2. (P91, #1.8.15
MA1300
Problem Set # 13, Solutions
1. Determine whether the sequence converges or diverges. If it converges, find the limit.
3 + 5n2
,
n + n2
r
n+1
(b). an =
.
9n + 1
(a). an =
Solution:
(a). We have
3
+5
n2
1
n
n +1
lim an = lim
n
= 5,
so cfw_an is conv
MA1300
Problem Set # 4, Solutions
1. Find the values of a and b that make f continuous everywhere.
2
x 4
if x < 2
x2
f (x) =
2
ax bx + 3 if 2 x < 3
2x a + b
if x 3.
Solution. For making f continuous everywhere, sufficient and necessary conditions are
2
EAP Writing Assessment Descriptors: Assessment 2
TASK FULFILMENT
(25%)
5
Organisation is clear, logical and effective at all Uses a wide range of sentence structures
levels
correctly and appropriately
An effective thesis is established and strongly
argu
Pre-reading discussion
1. In small groups, discuss the following:
What do you know about GM foods?
What benefits and risks might be
linked to genetically-modified foods?
List 3 points each.
2. Watch a short video and take
notes. Is the video pro or a
Pre-reading activities
Vocabulary focus
Collocation and word form
Feedback on practice writing
In groups of 3/4, speculate on
how long the average person
lives.
Discuss:
Factors that affect a persons
longevity. Use the table on p.137
Factors
Diet
Positive
EL0200
We e k 8
Complex Noun Phrases & Hedging
Unit 4 - Task 5: A few more grammar concepts
Most common sentence type in English: A subject and a verb (s+v)
Exception: Imperatives Stop! / Please sit down.
A subject in a sentence:
1. Can be a single wor
More on citation formats & practice
Reporting verb patterns
Writing task practice GM Foods
Homework & IL
Use APA citation format (American
Psychological Association)
You can incorporate evidence into
your writing by:
1. Quoting
2. Paraphrasing (& summar
EE3015 Tutorial 2
(Delay and Protocol Layering) Review Questions What are the seven layers in the OSI model? What are the five layers in the Internet protocol model? What are the four most important types of delay in a computer network? Problems 1. Consid
EE3015 Tutorial 1
(Circuit Switching vs. Packet Switching; Throughput and Delay) Review Questions: What are the three major components of the Internet? What is the difference between circuit switching and packet switching? What is multiplexing? List some
EE3015 Computer Networks
Quiz 2 (Solution) Tues. evening Semester A, 2010/11 1. (9%) The pulse coded modulation is the most common technique to change an analog signal to digital data (digitization). The pulse coded modulation has three steps : 1) The ana
EE3015 Computer Networks
Quiz 1(Solution) Wed. afternoon Semester A, 2010/11 1. (9%) Physical, data link, network. 2. (7%) Queueing delay (Because queueing delay at routers depends on the congestion level, which varies with time). and transmission delay 3