Transcript EEE521 - Universiti Sains Malaysia

Computer and Data Communications
Semester 2 2011-2012
Mohd Nazri Mahmud
Session 2a-27 Feb 2012
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Preparatory readings for Session 2a – First part
Read textbook 1, Chapter 2
 Students with no background are advised to read the
whole of Ch 2
 Prepare for group open book quiz
 Quiz will focus on Section 2.3 Layers and 2.4 The
TCP/IP protocol suite
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Preparatory reading for Session 2a – Second part
Read textbook Chapter 12: 12.1 Random Access,
Chapter 13: Ethernet focus on 13.1 MAC Frames
 Read Preparatory notes for Interconnecting LANs
 Attempt preparatory questions
 Prepare for participation in class
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Objective: To review the basics of TCP/IP layer as a refresher for
students with background and as a quick catch-up for those
without background
Rules
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Questions will be displayed one by one on the screen
All groups must answer all questions one by one by writing their
answers on a piece of paper
The lecture will read the questions and announce the duration given
for the groups to discuss and arrive at their agreed choice of answer
When the duration is over, the lecturer will immediately proceed to
the next question. There will be no repeat display of any question
At the end of the quiz, the group leaders will take their group answers
and write them on the white-board
The lecturer will discuss the answers to each questions and marks will
be given to each groups accordingly
The group with the highest mark wins
Points are carried forward to the next quiz.
Q1:
State the 5 layers of TCP/IP protocol suite
1.
2.
3.
4.
5.
(60 seconds)
Q2: What is the responsibility of the Data-link
Layer
A: Source-to-destination data delivery
B: Process-to-process data delivery
C: Application-to-application data delivery
D: Node-to-Node data delivery
E: Link-to-Link data delivery
30 seconds
Q3:Which one is NOT the function of the DataLink Layer
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Provides flow control function
Provides error control capability
Controlling access to the communication medium
Dividing the source data into frames
Specify the number of bits to be sent in one
second
45 seconds
Q4: Identify the appropriate terms for a data unit in each
layer
4.1 Physical Layer
4.2 Data-Link Layer
4.3 Network Layer
4.4 Transport Layer
Select your answers from the choices below
A: datagram
B: segment
C: frame
D: bits
90 seconds
Q5: The responsibility of the network layer
A: Process-to-process data delivery
B: Application-to-application data delivery
C: Source-to-destination data delivery across
multiple networks
D: Node-to-Node data delivery
E: Link-to-Link data delivery
30 seconds
Q6: How does the Network Layer ensure data sent by a
source station is delivered to the correct destination?
A: The Network Layer relies solely on the header
inserted by the higher layers (application and
transport layers).
B: The Network Layer in the destination station
announces to the network that it is the right receiver
C: The Network Layer of the sending station adds to a
header to the data segment. The header includes the
IP addresses of the sender and the receiver.
D: The Network Layers in the intermediate nodes
(routers) specify the destination without the need
for the Source station to tell them where to deliver
the data segment.
120 seconds
Q7: Which statement is NOT true about the
Internetworking Protocol (IP)
A: Is a connectionless protocol
B: Best effort delivery service
C: Is a reliable protocol
D: Provides no error correction
E: Delivers datagram not in their original sequence
60 seconds
Q8: Which 2 statements are TRUE for the
datagrams processed by the network layer
protocol
A: Datagrams are checked for errors and corrupted
datagrams are corrected
B: Datagrams can travel through different routes
inside the interconnection of multiple networks
C: Datagrams may arrive out of sequence at the
destination
D: All datagrams that belong to the same source
will follow the same path through the networks
to reach the destination
120 seconds
Q9: Which TWO statements are TRUE about the
TCP protocol
A: Ensure data delivered in sequence and free from
error
B: A connectionless protocol
C: Is not a reliable protocol
D: A connection-oriented protocol
END OF QUIZ
120 seconds
Q1:
State the 5 layers of TCP/IP protocol suite
1.PHY
2.DLL
3.NETW
4.TRANSPORT
5.APPLICATION
(60 seconds)
Q2: What is the responsibility of the Data-link
Layer
A: Source-to-destination data delivery
B: Process-to-process data delivery
C: Application-to-application data delivery
D: Node-to-Node data delivery
E: Link-to-Link data delivery
30 seconds
Q3:Which one is NOT the function of the DataLink Layer
A. Provides flow control function
B. Provides error control capability
C. Controlling access to the communication
medium
D. Dividing the source data into frames
E. Specify the number of bits to be sent in one
second
45 seconds
Q4: Identify the appropriate terms for a data unit
in each layer
4.1Physical Layer D
4.2 Data-Link Layer C
4.3 Network Layer A
4.4 Transport Layer B
Select your answers from the choices below
A: datagram
B: segment
C: frame
D: bits
90 seconds
Q5: The responsibility of the network layer
A: Process-to-process data delivery
B: Application-to-application data delivery
D: Node-to-No
C: Source-to-destination data delivery across
multiple networks
de data delivery
E: Link-to-Link data delivery
30 seconds
Q6: How does the Network Layer ensure data sent by a
source station is delivered to the correct destination?
A: The Network Layer relies solely on the header
inserted by the higher layers (application and
transport layers).
B: The Network Layer in the destination station
announces to the network that it is the right receiver
C: The Network Layer of the sending station adds to a
header to the data segment. The header includes the
IP addresses of the sender and the receiver.
D: The Network Layers in the intermediate nodes
(routers) specify the destination without the need
for the Source station to tell them where to deliver
the data segment.
120 seconds
Q7: Which statement is NOT true about the
Internetworking Protocol (IP)
A: Is a connectionless protocol
B: Best effort delivery service
C: Is a reliable protocol
D: Provides no error correction
E: Delivers datagram not in their original sequence
60 seconds
Q8: Which 2 statements are TRUE for the
datagrams processed by the network layer
protocol
A: Datagrams are checked for errors and corrupted
datagrams are corrected
B: Datagrams can travel through different routes
inside the interconnection of multiple networks
C: Datagrams may arrive out of sequence at the
destination
D: All datagrams that belong to the same source
will follow the same path through the networks
to reach the destination
120 seconds
Q9: Which TWO statements are TRUE about the
TCP protocol
A: Ensure data delivered in sequence and free
from error
B: A connectionless protocol
C: Is not a reliable protocol
D: A connection-oriented protocol
END OF QUIZ
120 seconds
 Preparatory
reading for Session 2a – Second
part




Read textbook Chapter 12: 12.1 Random Access,
Chapter 13: Ethernet - focus on 13.1 MAC Frames
Read Preparatory notes for Interconnecting LANs
Attempt preparatory questions
Prepare for participation in class
λ is a positive real number, equal to the expected number of
occurrences during the given interval.
For instance, if the events occur on average 4 times per minute,
and one is interested in the probability of an event occurring k times
in a 10 minute interval, one would use a Poisson distribution as the
model with λ = 10×4 = 40.
describes the time between events in a Poisson process