Network Topologies and OSI Model Quiz
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Questions and Answers

True or false: Network Operating Systems control the communication with resources and the flow of data across the network?

True

True or false: NOS runs on the workstation?

False

True or false: Linux, Windows Server, and macOS Server are examples of popular NOSs?

True

True or false: There are generally three resource access models: peer-to-peer, client-server, and hybrid?

<p>False</p> Signup and view all the answers

True or false: The size of the organization is an important factor in deciding the resource access model?

<p>True</p> Signup and view all the answers

True or false: Additional training is never needed when implementing new network resources?

<p>False</p> Signup and view all the answers

The Data Link layer is divided into two sections: MAC and LLC.

<p>True</p> Signup and view all the answers

The Physical layer defines how data is transmitted over a communication medium.

<p>True</p> Signup and view all the answers

The IEEE 802 standards were designed primarily for enhancements to the top three layers of the OSI model.

<p>False</p> Signup and view all the answers

The Logical Link Control sublayer manages data link communications.

<p>True</p> Signup and view all the answers

CSMA/CD stands for Carrier Sense Multiple Access with Collision Detection.

<p>True</p> Signup and view all the answers

CSMA/CA is a contention-based access method used in wired Ethernet networks.

<p>False</p> Signup and view all the answers

True or false: The Bus topology is the most expensive network topology.

<p>False</p> Signup and view all the answers

True or false: The Star topology is the easiest to reconfigure.

<p>True</p> Signup and view all the answers

True or false: The Ring topology has the best fault tolerance.

<p>False</p> Signup and view all the answers

True or false: The Mesh topology is rarely found in wired LANs.

<p>True</p> Signup and view all the answers

True or false: The Hybrid topology is more complex than the Mesh topology.

<p>False</p> Signup and view all the answers

True or false: The physical design of the Mesh topology is cheap to install and maintain.

<p>False</p> Signup and view all the answers

True or false: Peer-to-peer networks are suitable for small, simple, and inexpensive networks.

<p>True</p> Signup and view all the answers

True or false: Peer-to-peer networks are also referred to as workgroups.

<p>True</p> Signup and view all the answers

True or false: Centralized administration and control are lacking in peer-to-peer networks, making network management difficult and security weak.

<p>True</p> Signup and view all the answers

True or false: Peer-to-peer networks are not recommended for small companies expecting future growth.

<p>True</p> Signup and view all the answers

True or false: Client-server networks are better for large networks that require a secure environment and centralized control.

<p>True</p> Signup and view all the answers

True or false: Server-based networks offer better security than peer-to-peer networks.

<p>True</p> Signup and view all the answers

True or false: The mesh topology becomes inefficient with five or more entities due to the high number of connections required.

<p>True</p> Signup and view all the answers

True or false: The hybrid topology is a mix of other topologies and is commonly seen in modern networks.

<p>True</p> Signup and view all the answers

True or false: Networks need a common language called a protocol for computers to communicate with each other.

<p>True</p> Signup and view all the answers

True or false: The OSI model was published by the ISO in 1984 to describe network protocols.

<p>True</p> Signup and view all the answers

True or false: The OSI model consists of seven layers, each adding information to the data being transmitted.

<p>True</p> Signup and view all the answers

True or false: The higher layers of the OSI model pass data through the lower layers, adding headers and trailers.

<p>False</p> Signup and view all the answers

Why does the mesh topology become inefficient with five or more entities?

<p>Due to the high number of connections required.</p> Signup and view all the answers

What is the hybrid topology?

<p>A mix of other topologies and commonly seen in modern networks.</p> Signup and view all the answers

What is the purpose of a protocol in networks?

<p>To provide a common language for computers to communicate with each other.</p> Signup and view all the answers

When was the OSI model published and what was its purpose?

<p>Published by the ISO in 1984 to describe network protocols.</p> Signup and view all the answers

How many layers does the OSI model consist of?

<p>Seven layers.</p> Signup and view all the answers

What do the higher layers of the OSI model do?

<p>They pass data through the lower layers, adding headers and trailers.</p> Signup and view all the answers

What are the advantages and disadvantages of the Bus topology?

<p>Advantages: cheap and easy to install. Disadvantages: difficult to reconfigure and a break in the bus disables the entire network.</p> Signup and view all the answers

What are the advantages and disadvantages of the Star topology?

<p>Advantages: cheap, easy to install and reconfigure, and more resilient to a single cable failure. Disadvantages: more expensive than Bus topology.</p> Signup and view all the answers

What are the advantages and disadvantages of the Ring topology?

<p>Advantages: efficient and easy to install. Disadvantages: difficult to reconfigure and very expensive.</p> Signup and view all the answers

What are the advantages and disadvantages of the Mesh topology?

<p>Advantages: best fault tolerance. Disadvantages: extremely difficult, expensive, and complex to reconfigure.</p> Signup and view all the answers

What are the advantages and disadvantages of the Hybrid topology?

<p>Advantages: combines the best features of each topology used. Disadvantages: complex (less so than Mesh).</p> Signup and view all the answers

What is the physical design of the Mesh topology like?

<p>Expensive to install and maintain, but there will always be a way to get the data from source to destination.</p> Signup and view all the answers

What are the advantages and disadvantages of peer-to-peer networks?

<p>Advantages: suitable for small, simple, and inexpensive networks; each computer acts as both service provider and service requestor. Disadvantages: lack centralized administration and control; difficult network management and weak security; not recommended for small companies expecting future growth.</p> Signup and view all the answers

What are the advantages and disadvantages of client-server networks?

<p>Advantages: better for large networks requiring secure environment and centralized control; dedicated servers for administrative functions and resource sharing. Disadvantages: higher cost; centralized security needs.</p> Signup and view all the answers

What is the difference between peer-to-peer networks and client-server networks?

<p>Peer-to-peer networks have decentralized control and lack centralized administration, while client-server networks have centralized control and administration through dedicated servers.</p> Signup and view all the answers

Which network design is better for growing companies, large environments, and centralized security needs?

<p>Server-based networks (client-server networks) are suitable for growing companies, large environments, and centralized security needs.</p> Signup and view all the answers

What is the alternative name for peer-to-peer networks?

<p>Peer-to-peer networks are also referred to as workgroups.</p> Signup and view all the answers

What is the alternative name for client-server networks?

<p>Client-server networks are also known as domains.</p> Signup and view all the answers

What is the purpose of a network operating system (NOS) in a network?

<p>The purpose of a network operating system (NOS) is to control the communication with resources and the flow of data across the network, running on the server.</p> Signup and view all the answers

What are the two resource access models commonly used in networks?

<p>The two resource access models commonly used in networks are peer-to-peer and client-server.</p> Signup and view all the answers

What factors should be considered when deciding which resource access model is needed?

<p>When deciding which resource access model is needed, factors such as the size of the organization, the required level of security, the software or hardware requirements of the resource, the level of administration needed, the cost, and whether the resource meets the needs of the organization today and in the future should be considered.</p> Signup and view all the answers

What are some examples of popular network operating systems (NOSs)?

<p>Some examples of popular network operating systems (NOSs) are Linux, Microsoft's Windows Server series (Server 2019, Server 2016, etc.), and macOS Server.</p> Signup and view all the answers

What are the main components of a typical network?

<p>The main components of a typical network are servers and workstations.</p> Signup and view all the answers

Why is it important to choose the appropriate resource access model for a network?

<p>It is important to choose the appropriate resource access model for a network as it determines how resources are accessed and affects factors such as security, administration, and cost.</p> Signup and view all the answers

What is the purpose of the Data Link layer in the OSI model?

<p>The purpose of the Data Link layer is to manage data link communications and watch out for data collisions.</p> Signup and view all the answers

What are the two sublayers of the Data Link layer in the IEEE 802 standard?

<p>The two sublayers of the Data Link layer in the IEEE 802 standard are the Logical Link Control (LLC) sublayer and the Media Access Control (MAC) sublayer.</p> Signup and view all the answers

What is the role of the Media Access Control (MAC) sublayer?

<p>The role of the Media Access Control (MAC) sublayer is to manage physical addresses, also referred to as MAC addresses, and watch out for data collisions.</p> Signup and view all the answers

What is CSMA/CD and how does it work?

<p>CSMA/CD stands for Carrier Sense Multiple Access with Collision Detection. It is a contention-based access method used in Ethernet networks. In CSMA/CD, computers on the network listen to the wire at all times (Carrier Sense), multiple computers have access to the line at the same time (Multiple Access), and when two machines transmit at the same time, a data collision takes place (Collision Detection). Each sender then waits for a short, random period of time and tries to transmit again, repeating the process until transmission takes place successfully.</p> Signup and view all the answers

What is the difference between CSMA/CD and CSMA/CA?

<p>The difference between CSMA/CD and CSMA/CA is that CSMA/CD tries to fix collisions after they happen, while CSMA/CA tries to avoid them in the first place by actively listening and only transmitting when the channel is clear.</p> Signup and view all the answers

Which IEEE 802 standard is commonly associated with wireless networking?

<p>The IEEE 802.11 standard is commonly associated with wireless networking.</p> Signup and view all the answers

Networks use a ______ operating system (NOS) to control the communication with resources and the flow of data across the network.

<p>network</p> Signup and view all the answers

Some of the more popular NOSs are ______, Microsoft’s Windows Server series (Server 2019, Server 2016, and so on), and macOS Server.

<p>Linux</p> Signup and view all the answers

There are generally two resource access models: ______ and client-server.

<p>peer-to-peer</p> Signup and view all the answers

It is important to choose the appropriate ______ model.

<p>resource</p> Signup and view all the answers

How do you decide which type of ______ model is needed.

<p>resource</p> Signup and view all the answers

You must first think about the following questions: What is the size of the ______.

<p>organization</p> Signup and view all the answers

True or false: The application layer allows ______ to network services.

<p>access</p> Signup and view all the answers

The transport layer controls the data flow and ______ any transmission problems.

<p>troubleshoots</p> Signup and view all the answers

The data link layer arranges data into ______ and includes control information and the MAC address for each NIC.

<p>frames</p> Signup and view all the answers

The mesh topology becomes inefficient with five or more entities due to the high number of ______ required.

<p>connections</p> Signup and view all the answers

Networks need a common language called a ______ for computers to communicate with each other.

<p>protocol</p> Signup and view all the answers

The OSI model consists of seven ______, each adding information to the data being transmitted.

<p>layers</p> Signup and view all the answers

Peer-to-peer networks are suitable for ______, simple, and inexpensive networks.

<p>small</p> Signup and view all the answers

Each computer in a peer-to-peer network acts as both a service provider and a ______.

<p>service requestor</p> Signup and view all the answers

Centralized administration and control are lacking in peer-to-peer networks, making network management difficult and ______ weak.

<p>security</p> Signup and view all the answers

Peer-to-peer networks are not recommended for small companies expecting ______ growth.

<p>future</p> Signup and view all the answers

Client-server networks are better for ______ networks that require a secure environment and centralized control.

<p>large</p> Signup and view all the answers

Server-based networks use dedicated, centralized servers for administrative functions and ______ sharing.

<p>resource</p> Signup and view all the answers

True or false: The Bus topology is _____ and easy to install, but difficult to reconfigure and a break in the bus disables the entire network.

<p>cheap</p> Signup and view all the answers

True or false: The _______ topology is cheap, easy to install and reconfigure, and more resilient to a single cable failure, but more expensive than Bus topology.

<p>Star</p> Signup and view all the answers

True or false: The Ring topology is efficient and easy to install, but reconfiguration is difficult and it is very ________.

<p>expensive</p> Signup and view all the answers

True or false: The Mesh topology has the best fault tolerance, but reconfiguration is extremely difficult, expensive, and ________.

<p>complex</p> Signup and view all the answers

True or false: The _______ topology combines the best features of each topology used, but it is complex (less so than Mesh).

<p>Hybrid</p> Signup and view all the answers

Bus topology consists of a single cable that runs to every workstation, each computer shares the same data and address path, and it is the _______ to install.

<p>cheapest</p> Signup and view all the answers

The Data Link layer is subdivided into two sections: ______ and Logical Link Control (LLC).

Signup and view all the answers

The Physical layer describes how the data gets transmitted over a communication ______.

Signup and view all the answers

The IEEE 802 standards were designed primarily for enhancements to the ______ three layers of the OSI model.

Signup and view all the answers

The IEEE 802 standard breaks the Data Link layer into two sublayers: a Logical Link Control (LLC) sublayer and a ______ sublayer.

Signup and view all the answers

The original 802.3 CSMA/CD standard defines a ______ topology network that uses a 50-ohm coaxial baseband cable and carries transmissions at 10 Mbps.

Signup and view all the answers

CSMA/CD stands for Carrier Sense Multiple Access with ______ Detection.

Signup and view all the answers

Study Notes

Understanding Network Topologies and the OSI Model

  • The mesh topology becomes inefficient with five or more entities due to the high number of connections required.
  • The hybrid topology is a mix of other topologies and is commonly seen in modern networks.
  • Networks need a common language called a protocol for computers to communicate with each other.
  • The OSI model was published by the ISO in 1984 to describe network protocols.
  • The OSI model consists of seven layers, each adding information to the data being transmitted.
  • The higher layers of the OSI model pass data through the lower layers, adding headers and trailers.
  • The bottom layer sends the information out on the wire or wirelessly.
  • At the receiving end, the bottom layer removes the header and passes the data to the next highest layer.
  • The OSI model layers include the application layer, presentation layer, session layer, transport layer, network layer, and data link layer.
  • The application layer allows access to network services.
  • The transport layer controls the data flow and troubleshoots any transmission problems.
  • The data link layer arranges data into frames and includes control information and the MAC address for each NIC.

Choosing the Right Network Design: Peer-to-Peer vs. Client-Server

  • A well-planned network design is crucial for effective and efficient implementation.
  • The type of resource model chosen depends on the network's requirements.
  • Peer-to-peer networks are suitable for small, simple, and inexpensive networks.
  • Peer-to-peer networks are also referred to as workgroups.
  • Each computer in a peer-to-peer network acts as both a service provider and a service requestor.
  • Centralized administration and control are lacking in peer-to-peer networks, making network management difficult and security weak.
  • Peer-to-peer networks are not recommended for small companies expecting future growth.
  • Client-server networks are better for large networks that require a secure environment and centralized control.
  • Server-based networks use dedicated, centralized servers for administrative functions and resource sharing.
  • Server-based networks are also known as domains and offer better security than peer-to-peer networks.
  • In a server-based network, security is centrally administered through a domain controller.
  • Server-based networks are suitable for growing companies, large environments, and centralized security needs.

Network Topologies: Bus, Star, Ring, Mesh, and Hybrid

  • There are five primary network topologies: Bus, Star, Ring, Mesh, and Hybrid.
  • Each topology has its own advantages and disadvantages.
  • Table 6.1 summarizes the advantages and disadvantages of each topology.
  • The Bus topology is cheap and easy to install, but difficult to reconfigure and a break in the bus disables the entire network.
  • The Star topology is cheap, easy to install and reconfigure, and more resilient to a single cable failure, but more expensive than Bus topology.
  • The Ring topology is efficient and easy to install, but reconfiguration is difficult and it is very expensive.
  • The Mesh topology has the best fault tolerance, but reconfiguration is extremely difficult, expensive, and complex.
  • The Hybrid topology combines the best features of each topology used, but it is complex (less so than Mesh).
  • Bus topology consists of a single cable that runs to every workstation, each computer shares the same data and address path, and it is the cheapest to install.
  • Star topology branches each network device off a central device called a hub or a switch, making it easy to add a new workstation, and it is the most commonly installed network topology.
  • Ring topology connects each computer to two other computers in a circle, and it is difficult to add new computers and has low fault tolerance.
  • Mesh topology connects each device to every other device, it is rarely found in wired LANs due to the complexity of cabling, but it provides high fault tolerance and is often used to connect multiple sites across WAN links.
  • Physical design of the mesh topology is expensive to install and maintain, but there will always be a way to get the data from source to destination.

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Description

Test your knowledge of network topologies and the OSI model with this quiz. Learn about different network topologies, the purpose of the OSI model, and the functions of each layer. Challenge yourself to see how well you understand network protocols and data transmission.

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