Computer Networks at Frankfurt University of Applied Sciences

Flashcards and summaries for Computer Networks at the Frankfurt University of Applied Sciences

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Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

With handheld transceivers, often called walkie-talkie, two or more participants can talk to each other. However, at no time, more than one participant can speak. 

Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

According to what directional dependence principle do walkie talkies operate?

Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

Name 2 systems, that operate according to the simplex principle

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Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

Name an advantage and a drawback of communication systems that operate according to the simplex principle?

Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

Name 2 systems, that operate according to the fully-duplex principle.

Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

Name an advantage and a drawback of communication systems that operate according to the full-duplex principle?

Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

Assign to technical terms „Frames“, „Packets“, „Segments“ and „Signals“ to the layers of the reference models in the figure.


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Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

Why are the Presentation Layer and the Session Layer not intensively used?


Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

Why is the hybrid reference model closer to reality, compared with the TCP/IP reference model?


Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

Why is the outer conductor (the shield) of coaxial cables kept at ground

potential and does completely surround the inner conductor?


Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

What is a Transceiver?


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What transmission media are used for computer networks?


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Exemplary flashcards for Computer Networks at the Frankfurt University of Applied Sciences on StudySmarter:

Computer Networks

With handheld transceivers, often called walkie-talkie, two or more participants can talk to each other. However, at no time, more than one participant can speak. 

only a single channel is used

Computer Networks

According to what directional dependence principle do walkie talkies operate?

Half-Duplex

Computer Networks

Name 2 systems, that operate according to the simplex principle

Radio, TV, pager, satellite, GPS, Radio clock signal

Computer Networks

Name an advantage and a drawback of communication systems that operate according to the simplex principle?

Advantage: When using a wireless network, only a single channel is required. When using a wired network, lesser labeling effort is required. 

Drawback: The information transfer only works in one direction.

Computer Networks

Name 2 systems, that operate according to the fully-duplex principle.

Ethernet via twisted pair cables, telephone

Computer Networks

Name an advantage and a drawback of communication systems that operate according to the full-duplex principle?

Advantage: The information transfer works in both directions simultaneously.

Drawbacks : when using a wireless network, multiple channels are required. When using a wired network, the labeling effort is higher.

Computer Networks

Assign to technical terms „Frames“, „Packets“, „Segments“ and „Signals“ to the layers of the reference models in the figure.


(Message ⇒ Application Layer)

Segments ⇒ Transport Layer

Packets ⇒ Network Layer

Frames ⇒ Data Link Layer

Signals ⇒ Physical Layer


Computer Networks

Why are the Presentation Layer and the Session Layer not intensively used?


The functionalities, which are intended for the Session Layer and Presentation Layer, are now part of protocols and services in the Application Layer.


Computer Networks

Why is the hybrid reference model closer to reality, compared with the TCP/IP reference model?


The hybrid reference model illustrates the functioning of computer networks in a realistic way because it distinguishes between the Physical Layer and Data Link Layer and it does not subdivide the Application Layer. It combines the advantages of the TCP/IP reference model and the OSI reference model, without taking over their drawbacks.

Computer Networks

Why is the outer conductor (the shield) of coaxial cables kept at ground

potential and does completely surround the inner conductor?



The shielding of the signal-carrying conductor by the shield, that is kept at ground potential, reduces electromagnetic interferences.


Computer Networks

What is a Transceiver?


Via Transceivers, terminal devices are connected with the transmission medium.


Computer Networks

What transmission media are used for computer networks?



Guided transmission media exist and can be Copper cables, where data is transferred as electrical impulses or fiber-optic cables, where data is transferred as light impulses.

Wireless transmission can base on radio technology, infrared and laser


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