CNIT 344 EXAM 1 | 162 QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS |
GRADED A+ | NEW UPDATE 2025
Components of Communication - ANSWER Message Source -> Encoder ->
Transmitter -> Transmission Medium "The Channel" -> Receiver -> Decoder ->
Message Destination
What ISO Standard is the OSI Model? - ANSWER ISO Standard 7498.
(ITU-T specifies X.200-X.299 Recommendations).
What does OSI stand for? - ANSWER Open System Interconnection.
What does the OSI Model do? - ANSWER It defines 7 layers that describe the
complete application-based communications between any two systems. It
provides open interconnections between layers, such that multi-vendor
environments can be supported.
What are the Rules for Communication for the OSI Model? - ANSWER 1. The
communication between layers is handled in a specified (defined) manner.
2. Each layer is only able to communicate with its adjacent layers.
3. Each layer relies on the layers below it to perform their specified function.
,4. Each layer relies on the layers above it to perform their specified function.
What are some benefits to the OSI Model? - ANSWER 1. Breaks network
communication into smaller, more manageable parts. Prevents changes in one
layer from affecting other layers.
2. Standardizes network components to allow multiple vendor development and
support.
3. Allows different types of network hardware and software to communicate with
each other.
1st Layer of the OSI Model - ANSWER Physical Layer
2nd Layer of the OSI Model - ANSWER Data Link Layer
3rd Layer of the OSI Model - ANSWER Network Layer
4th Layer of the OSI Model - ANSWER Transport Layer
5th Layer of the OSI Model - ANSWER Session Layer
6th Layer of the OSI Model - ANSWER Presentation Layer
, 7th Layer of the OSI Model - ANSWER Application Layer
List all 7 layers of the OSI Model - ANSWER 7. Application
6. Presentation
5. Session
4. Transport
3. Network
2. Data Link
1. Physical
What is the physical layer of the OSI model responsible for? - ANSWER It is
responsible for the transmission and receipt of the bit stream to/from nodes. It is
solely concerned with signaling techniques (such as activating, maintaining, and
terminating the physical circuit).
Where is the physical layer of the OSI model defined? - ANSWER X.211
What is the data link layer of the OSI model responsible for? - ANSWER It is
responsible for providing point-to-point validity of the data via point-to-point
checking/correction, and it is responsible for the procedures and protocols for
reliably operating the communication links.
It has an independent address architecture from other layers.
ANSWERS WITH COMPLETE SOLUTIONS |
GRADED A+ | NEW UPDATE 2025
Components of Communication - ANSWER Message Source -> Encoder ->
Transmitter -> Transmission Medium "The Channel" -> Receiver -> Decoder ->
Message Destination
What ISO Standard is the OSI Model? - ANSWER ISO Standard 7498.
(ITU-T specifies X.200-X.299 Recommendations).
What does OSI stand for? - ANSWER Open System Interconnection.
What does the OSI Model do? - ANSWER It defines 7 layers that describe the
complete application-based communications between any two systems. It
provides open interconnections between layers, such that multi-vendor
environments can be supported.
What are the Rules for Communication for the OSI Model? - ANSWER 1. The
communication between layers is handled in a specified (defined) manner.
2. Each layer is only able to communicate with its adjacent layers.
3. Each layer relies on the layers below it to perform their specified function.
,4. Each layer relies on the layers above it to perform their specified function.
What are some benefits to the OSI Model? - ANSWER 1. Breaks network
communication into smaller, more manageable parts. Prevents changes in one
layer from affecting other layers.
2. Standardizes network components to allow multiple vendor development and
support.
3. Allows different types of network hardware and software to communicate with
each other.
1st Layer of the OSI Model - ANSWER Physical Layer
2nd Layer of the OSI Model - ANSWER Data Link Layer
3rd Layer of the OSI Model - ANSWER Network Layer
4th Layer of the OSI Model - ANSWER Transport Layer
5th Layer of the OSI Model - ANSWER Session Layer
6th Layer of the OSI Model - ANSWER Presentation Layer
, 7th Layer of the OSI Model - ANSWER Application Layer
List all 7 layers of the OSI Model - ANSWER 7. Application
6. Presentation
5. Session
4. Transport
3. Network
2. Data Link
1. Physical
What is the physical layer of the OSI model responsible for? - ANSWER It is
responsible for the transmission and receipt of the bit stream to/from nodes. It is
solely concerned with signaling techniques (such as activating, maintaining, and
terminating the physical circuit).
Where is the physical layer of the OSI model defined? - ANSWER X.211
What is the data link layer of the OSI model responsible for? - ANSWER It is
responsible for providing point-to-point validity of the data via point-to-point
checking/correction, and it is responsible for the procedures and protocols for
reliably operating the communication links.
It has an independent address architecture from other layers.
