Review Questions for Chapter 2
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Which layers in the Internet model are the network support layers?
Physical, data link, network layers
Which layer(s) in the OSI model is (are) the user support layer(s)?
Application layer supports the user
What are the concerns of the physical layer in the Internet model?
- Physical characteristics of the media,
- Representation of the bits
- Type of encoding
- Synchronization of the bits
- Transmission rate and mode
- Physical network topology
What are the responsibilities of the data link layer in the Internet model?
- Providing hop-to-hop delivery
- Framing data bits
- Providing the physical addresses
- Data rate control
- Detection and correction of damaged frames
- Multiple access
Review Questions for Chapter 2
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What are the responsibilities of the network layer in the Internet
model?
- Providing host-to-host delivery
- Logical addressing
- Routing
What are the responsibilities of the transport layer in the Internet
model?
- Providing process-to-process delivery
- Port addressing
- Segmentation and reassembly of the messages
- Flow and error control
- Connection control
Review Questions for Chapter 2 (Cont’d)
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Match the following to one or more layers of the OSI model:
a)
b)
c)
d)
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Route determination
network layer
Flow control
data link and transport layers
Interface to transmission media physical layer
Provides access for the end user
application layer
Match the following to one or more layers of the OSI model:
a)
b)
c)
d)
e)
Reliable process-to-process delivery
transport layer
Route selection
network layer
Defines frames
data link layer
Provides user services such as e-mail and file transfer
Application layer
Transmission of bit stream across physical medium
physical layer
Review Questions for Chapter 2 (Cont’d)
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Match the following to one or more layers of the OSI model:
a)
Communicates directly with user’s application
Application layer
b)
Error correction and retransmission
c)
Mechanical, electrical, and functional interface
d)
Responsibility for carrying frames between adjacent nodes Data link layer
Data link and Transport layers
Physical layer
Match the following to one or more layers of the OSI model:
a)
Format and code conversion services
Presentation layer
b)
Establishes, manages, and terminates sessions
c)
Ensures reliable transmission of data
d)
Log-in and log-out procedures
e)
Provides independence from differences in data representation
Presentation layer
Session layer
Data link and Transport layers
Session layer