Exam 1: Introduction to Data Communications

The network layer performs the same functions in both the OSI and Internet models and is responsible for routing messages from the source computer to the destination computer.

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Question 1

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What are the seven layers of the OSI model and what does each of these layers do? How does the OSI model compare to the Internet model? What does OSI stand for, and who developed this model?

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Question 2

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The seven layers of the OSI (Open Systems Interconnection) model are:

1. Physical Layer: This layer deals with the physical connection between devices and the transmission of raw data over a physical medium.

2. Data Link Layer: This layer is responsible for the reliable transmission of data across a physical link and includes error detection and correction.

3. Network Layer: This layer handles the routing of data packets from the source to the destination across multiple networks.

4. Transport Layer: This layer ensures the reliable delivery of data between the source and destination, including error checking and flow control.

5. Session Layer: This layer establishes, maintains, and terminates connections between applications.

6. Presentation Layer: This layer is responsible for data translation, encryption, and compression.

7. Application Layer: This layer provides network services to the end-user applications.

The OSI model is often compared to the Internet model, which is based on the TCP/IP protocol suite. While the OSI model has seven layers, the Internet model has four layers: the network interface, internet, transport, and application layers. The Internet model is more widely used in practice, but the OSI model is still used as a conceptual framework for understanding network communication.

OSI stands for Open Systems Interconnection, and it was developed by the International Organization for Standardization (ISO) in the late 1970s. The model was created to standardize the way different computer systems communicate with each other and to provide a framework for understanding and developing network protocols.

A local area network LAN) connects other LANs and backbone networks BNs) located in different areas to each other and to wide area networks in a span from 3 to 30 miles.

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Question 3

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It is not uncommon for companies to end up spending more money on network management and security tasks than they do on the actual computer equipment itself.

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Question 4

The American National Standards Institute:

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Question 5

___________ is an orderly close to a dialogue between end users.

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Question 6

Which is not a function of the physical layer:

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Question 7

In the Internet model, the application layer corresponds to the ________ layers) of the OSI model.

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Question 8

How can data communications networks affect businesses?

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Question 9

The ____________ layer of the OSI model is responsible for data format translation.

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Question 10

The _ layer performs error checking which is redundant to some extent with the function of the _ layer.

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Question 11

Networks that are designed to connect similar computers that share data and software with each other are called:

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Question 12

Which of the following is not true about a server?

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Question 13

Due to advances in high speed communication networks, the information lag, or the time it takes for information to be disseminated around the world, has been significantly shortened.

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Question 14

Draw a diagram of the Internet model and describe what each of the five layers do.Put three examples of standards on each of your layers in the diagram.Do this in detail, explaining how a message is transmitted from one computer to another using this model.

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Question 15

Data communications and networking can be considered as a global area of study because:

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Question 16

An) _________ is a LAN that uses the same technologies as the Internet but is provided to invited users outside the organization who access it over the Internet.

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Question 17

The network layer of the Internet model uses the _____________ protocol to route messages though the network.

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Question 18

A car manufacturer may give access to certain portions of its network to some of its suppliers via the Internet.This is an example of an extranet.

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Question 19

An) _____________ is a set of rules that determine what a layer would do and provides a clearly defined set of messages that software at the layer needs to understand.

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Question 20

Showing 1 - 20 of 79

The network layer performs the same functions in both the OSI and Internet models and is responsible for routing messages from the source computer to the destination computer.

What are the seven layers of the OSI model and what does each of these layers do? How does the OSI model compare to the Internet model? What does OSI stand for, and who developed this model?

A local area network LAN) connects other LANs and backbone networks BNs) located in different areas to each other and to wide area networks in a span from 3 to 30 miles.

It is not uncommon for companies to end up spending more money on network management and security tasks than they do on the actual computer equipment itself.

The American National Standards Institute:

___________ is an orderly close to a dialogue between end users.

Which is not a function of the physical layer:

In the Internet model, the application layer corresponds to the ________ layers) of the OSI model.

How can data communications networks affect businesses?

The ____________ layer of the OSI model is responsible for data format translation.

The _ layer performs error checking which is redundant to some extent with the function of the _ layer.

Networks that are designed to connect similar computers that share data and software with each other are called:

Which of the following is not true about a server?

Due to advances in high speed communication networks, the information lag, or the time it takes for information to be disseminated around the world, has been significantly shortened.

Draw a diagram of the Internet model and describe what each of the five layers do.Put three examples of standards on each of your layers in the diagram.Do this in detail, explaining how a message is transmitted from one computer to another using this model.

Data communications and networking can be considered as a global area of study because:

An) _________ is a LAN that uses the same technologies as the Internet but is provided to invited users outside the organization who access it over the Internet.

The network layer of the Internet model uses the _____________ protocol to route messages though the network.

A car manufacturer may give access to certain portions of its network to some of its suppliers via the Internet.This is an example of an extranet.

An) _____________ is a set of rules that determine what a layer would do and provides a clearly defined set of messages that software at the layer needs to understand.

Application Layer

Physical Layer

Data Link Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters

Exam 1: Introduction to Data Communications

The network layer performs the same functions in both the OSI and Internet models and is responsible for routing messages from the source computer to the destination computer.

What are the seven layers of the OSI model and what does each of these layers do? How does the OSI model compare to the Internet model? What does OSI stand for, and who developed this model?

A local area network LAN) connects other LANs and backbone networks BNs) located in different areas to each other and to wide area networks in a span from 3 to 30 miles.

It is not uncommon for companies to end up spending more money on network management and security tasks than they do on the actual computer equipment itself.

The American National Standards Institute:

___________ is an orderly close to a dialogue between end users.

Which is not a function of the physical layer:

In the Internet model, the application layer corresponds to the ________ layers) of the OSI model.

How can data communications networks affect businesses?

The ____________ layer of the OSI model is responsible for data format translation.

The _________ layer performs error checking which is redundant to some extent with the function of the _________ layer.

Networks that are designed to connect similar computers that share data and software with each other are called:

Which of the following is not true about a server?

Due to advances in high speed communication networks, the information lag, or the time it takes for information to be disseminated around the world, has been significantly shortened.

Draw a diagram of the Internet model and describe what each of the five layers do.Put three examples of standards on each of your layers in the diagram.Do this in detail, explaining how a message is transmitted from one computer to another using this model.

Data communications and networking can be considered as a global area of study because:

An) _________ is a LAN that uses the same technologies as the Internet but is provided to invited users outside the organization who access it over the Internet.

The network layer of the Internet model uses the _____________ protocol to route messages though the network.

A car manufacturer may give access to certain portions of its network to some of its suppliers via the Internet.This is an example of an extranet.

An) _____________ is a set of rules that determine what a layer would do and provides a clearly defined set of messages that software at the layer needs to understand.

Application Layer

Physical Layer

Data Link Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters

The _ layer performs error checking which is redundant to some extent with the function of the _ layer.