Network Topologies and Communication Modes

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Questions and Answers

What is a characteristic of half-duplex mode?

Uses the entire capacity of the channel for each direction (correct)

Allows simultaneous communication in both directions

Is the fastest mode for data transmission

Only works for one direction at a time

Half-duplex mode enables communication in both directions at the same time.

False

In what situations is half-duplex mode typically used?

When simultaneous communication in both directions is not required.

What is a primary characteristic of a mesh topology?

It is robust against link failures. Signup and view all the answers

In half-duplex communication, the entire capacity of the channel can be utilized for each __________.

direction Signup and view all the answers

A mesh topology can become incapacitated if one link becomes unusable.

False Signup and view all the answers

Match the modes of communication with their characteristics:

Half-duplex = Communication occurs in both directions, but not at the same time Full-duplex = Communication can occur simultaneously in both directions Simplex = Communication occurs in one direction only Duplex = General term for modes that allow two-way communication Signup and view all the answers

What advantage does a mesh topology offer regarding privacy or security?

Increased privacy or security due to multiple paths for data. Signup and view all the answers

One of the benefits of a mesh topology is its robustness, meaning that if one link becomes unusable, it does not __________ the entire system.

incapacitate Signup and view all the answers

Match the following characteristics with their descriptions:

Robustness = Does not incapacitate the system if one link fails Privacy = Enhances data security by using multiple paths Link failure = An event that does not solely affect mesh topology Topology = The arrangement of elements in a network Signup and view all the answers

What describes a drop line in a bus topology?

A connection running between the device and the main cable Signup and view all the answers

In a mesh topology, all nodes are directly connected to every other node.

True Signup and view all the answers

What topology uses a main cable to which all nodes are connected?

Bus Topology Signup and view all the answers

In a bus topology, nodes connect to the bus cable via __________.

drop lines and taps Signup and view all the answers

Match the following terms with their descriptions:

Drop line = Connection between device and main cable Bus topology = A network type using a single central cable Mesh topology = Network design with multiple connections among nodes Tap = Connection point on a bus cable Signup and view all the answers

What is the typical ownership status of a Local Area Network (LAN)?

Privately owned Signup and view all the answers

A Local Area Network (LAN) can connect devices across several cities.

False Signup and view all the answers

What is the maximum typical size of a LAN?

A few kilometers Signup and view all the answers

A Local Area Network (LAN) connects devices in a _______.

single office, building, or campus Signup and view all the answers

Match the following characteristics with Local Area Networks (LAN):

Privately owned = Characteristic of LANs Limited to a few kilometers = Characteristic of LANs Connects devices in a large area = Not characteristic of LANs Typically found in offices or buildings = Characteristic of LANs Signup and view all the answers

What does layer x on one machine do in relation to layer x on another machine?

Logically communicates Signup and view all the answers

Data are directly transferred from layer n on one machine to layer n on another machine.

False Signup and view all the answers

What type of address is used for communication with one specific recipient?

Unicast Signup and view all the answers

What type of communication occurs between corresponding layers on different machines?

Logical communication Signup and view all the answers

Between machines, layer x logically communicates with layer x on another machine, rather than directly transferring __________.

data Signup and view all the answers

Multicast addresses can be used to target all systems on a network.

False Signup and view all the answers

Match the following layers with their corresponding description of communication:

Layer n = Does not directly transfer data Layer x = Logically communicates with another machine Layer y = Operates independently from other layers Layer z = May utilize protocols for data exchange Signup and view all the answers

Define a broadcast address.

An address used to send data to all systems in a network. Signup and view all the answers

A __________ address is used to send data to multiple specified recipients only.

multicast Signup and view all the answers

Match the following types of addresses with their descriptions:

Unicast = Communication directed to a single recipient Multicast = Communication targeted to a group of recipients Broadcast = Communication sent to all devices in the network Anycast = Communication directed to the nearest recipient in the group Signup and view all the answers

Study Notes

Computer Networks Fundamentals

The computer network is a collection of autonomous computers interconnected via a single technology. Two computers are interconnected if they can exchange information.
Early computer networks were limited to exchanging text-based information. Current networks carry voice, video, text, and graphics, connecting various devices.
Business applications use computer networks by having company data stored on servers, and employees access it remotely using client devices.
In a client-server model, the client device requests information, and the server device responds.
Home applications primarily use the Internet for connectivity to remote computers.
Peer-to-peer networks allow computers to connect and share resources without a dedicated server. Each device can act as both a client and a server in this model.
Mobile users utilize networks for connectivity to remote computers to access information.

Uses of Computer Networks

Early data networks were limited to exchanging character-based information between connected computer systems.
Modern networks carry voice, video streams, text, and graphics.
They connect a wide variety of devices, including traditional company systems.
Home networking has become popular. Mobile devices, and social issues are also important aspects.

Home Applications

Internet access is used to connect home users to remote computers.
A common model is the client server model for information access
Peer-to-peer communication is another popular method for accessing information.

Mobile Users

Mobile users frequently use their mobile devices for internet access.
Wired connections are not practical in many mobile situations.

Social networks allow people to share views with like-minded others, which can involve problematic issues such as copyright, cookies, and spam.

Networks

A network is a collection of devices connected by communication links.
Devices can be computers, printers, etc.
Networks use distributed processing where tasks are divided among multiple computers instead of a large central machine.

The Elements of Computer Networks

Devices, medium, rules, and messages.
Common network devices include desktop computers, laptops, servers, switches, firewalls, routers, wireless routers, etc.

Data Flow

Communication methods between devices can be simplex, half-duplex, or full-duplex.
Simplex is one-way communication.
Half-duplex is two-way communication, but not simultaneously.
Full-duplex is two-way communication simultaneously.

Network Criteria

Performance - measured by transit time, response time, throughput, and delay.
Reliability - Measured by the frequency of failure, the time to recover, and the robustness against disasters.
Security - protecting data from unauthorized access, damage, and breaches.

Categories of Networks

Connection type—point-to-point (dedicated link) and multipoint (shared channel)
Topology—mesh, bus, star, ring, and hybrid
Distance—personal area networks (PANs), local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs).

OSI Model

A layered framework to design network systems that allows them to communicate with each other irrespective of architecture.
Protocols are required for communication
The framework is a model that allows data communication and networking to work together to move data from one device to another.

TCP/IP Protocol Suite

A layered protocol model for internetwork communications.
Defines four categories of functions necessary for successful communications.
Has the same structure of the OSI model
Built upon hardware

Addressing

Four addressing levels in TCP/IP protocols: physical address, logical address, port address, and application-specific address.
Physical addresses are unique to each device on a network.
Logical addresses are independent of the underlying physical network.
Port addresses are used to label the different processes on a computer.

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Description

This quiz covers essential concepts of network topologies, including mesh and bus topologies, and the characteristics of communication modes like half-duplex. It's designed to test your understanding of how different network architectures operate and their advantages. Prepare to explore the intricacies of these fundamental networking principles.

Network Topologies and Communication Modes

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Podcast

Questions and Answers

What is a characteristic of half-duplex mode?

Half-duplex mode enables communication in both directions at the same time.

In what situations is half-duplex mode typically used?

What is a primary characteristic of a mesh topology?

In half-duplex communication, the entire capacity of the channel can be utilized for each __________.

A mesh topology can become incapacitated if one link becomes unusable.

Match the modes of communication with their characteristics:

What advantage does a mesh topology offer regarding privacy or security?

One of the benefits of a mesh topology is its robustness, meaning that if one link becomes unusable, it does not __________ the entire system.

Match the following characteristics with their descriptions:

What describes a drop line in a bus topology?

In a mesh topology, all nodes are directly connected to every other node.

What topology uses a main cable to which all nodes are connected?

In a bus topology, nodes connect to the bus cable via __________.

Match the following terms with their descriptions:

What is the typical ownership status of a Local Area Network (LAN)?

A Local Area Network (LAN) can connect devices across several cities.

What is the maximum typical size of a LAN?

A Local Area Network (LAN) connects devices in a _______.

Match the following characteristics with Local Area Networks (LAN):

What does layer x on one machine do in relation to layer x on another machine?

Data are directly transferred from layer n on one machine to layer n on another machine.

What type of address is used for communication with one specific recipient?

What type of communication occurs between corresponding layers on different machines?

Between machines, layer x logically communicates with layer x on another machine, rather than directly transferring __________.

Multicast addresses can be used to target all systems on a network.

Match the following layers with their corresponding description of communication:

Define a broadcast address.

A __________ address is used to send data to multiple specified recipients only.

Match the following types of addresses with their descriptions:

Study Notes

Computer Networks Fundamentals

Uses of Computer Networks

Home Applications

Mobile Users

Social Issues

Networks

The Elements of Computer Networks

Data Flow

Network Criteria

Categories of Networks

OSI Model

TCP/IP Protocol Suite

Addressing

Studying That Suits You

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