Data Communications Protocols Quiz

Questions and Answers

What is a significant characteristic of a home network compared to other LAN types?

It needs to be easy to manage and secure for non-technical users (correct)

It requires high-level technical knowledge for management

It covers a broader geographical area

It only connects devices with Ethernet ports

What does a protocol stack represent in networking?

A system that regulates network security standards

A sequence of protocols arranged by layer in a communication system (correct)

A collection of networking hardware components

A method for optimizing data storage on networks

What is primarily measured by the term 'throughput' in a network context?

The frequency of signal oscillations

The maximum signal strength achievable

The reliability of network connections

The amount of data transferred over a period (correct)

Which type of satellites are favored for providing satellite-based internet backbone networks?

LEO satellites for low latency and proximity Signup and view all the answers

What defines the distinction between services and protocols in networking?

Services facilitate connectivity, protocols allow resource sharing Signup and view all the answers

What aspect of network development poses potential challenges due to increased freedom?

Unresolved social, political, and ethical issues Signup and view all the answers

What is the one-way signal transmission delay from the ground to a MEO satellite at 20,000 km?

66.7 ms Signup and view all the answers

Which reference model is predominantly employed for Internet networking?

TCP/IP Reference Model Signup and view all the answers

What is the primary function of a protocol in data communications?

To govern data communications Signup and view all the answers

Which of the following is NOT considered a guided transmission medium?

Microwave Signup and view all the answers

What is the purpose of the 4B/5B code?

To prevent long runs of consecutive 0s Signup and view all the answers

Which statement best describes a Content Delivery Network (CDN)?

A geographically distributed network of servers for efficient content distribution Signup and view all the answers

In Orthogonal Frequency-Division Multiplexing (OFDM), what aspect is divided into multiple subcarriers?

Channel bandwidth Signup and view all the answers

Which organization proposed the OSI Reference Model?

ISO Signup and view all the answers

What is the main function of switches in a switched network?

To create temporary connections between devices Signup and view all the answers

The primary innovation of 5G networks is characterized by which of the following?

Smaller cells and massive MIMO Signup and view all the answers

Study Notes

Data Communication Fundamentals

Protocols govern data communications, establishing rules for data exchange.
Guided transmission media include twisted pair, coaxial cable, and fiber optics; microwave is not part of this category.

Encoding Techniques

The 4B/5B code prevents long runs of consecutive 0s in data transmission.

Network Infrastructure

A Content Delivery Network (CDN) is a geographically distributed network of servers designed for efficient content distribution.
In Orthogonal Frequency-Division Multiplexing (OFDM), channel bandwidth is divided into multiple subcarriers.

Networking Models and Technologies

The ISO (International Organization for Standardization) proposed the OSI (Open Systems Interconnection) Reference Model.
Switches in a network create temporary connections between devices.
Essential components of a data communication system are the sender, transmission medium, and protocol; a server is not necessary for basic functionality.

Advancements in Networking

The primary innovation of 5G networks includes smaller cells and massive MIMO (Multiple Input, Multiple Output).
An "internetwork" refers to a collection of interconnected networks that together form the global Internet.

Home Networks

Home networks are distinguished by their requirement for ease of management and security for non-technical users.

Signal Transmission Calculations

A one-way signal transmission delay from Earth to a MEO satellite (20,000 km) is approximately 66.7 ms when calculated at the speed of light (3 × 10⁸ m/s).

Content Delivery

Server farms are essential for hosting large volumes of content in a content delivery context.

Protocols and Services in Networking

A "protocol stack" consists of layers of protocols utilized by a system, each serving different functions.
Key differences between services and protocols: services define operations, while protocols establish communication rules.

Satellite Technology

LEO (Low Earth Orbit) satellites are considered for satellite-based Internet backbone networks.
A LEO satellite system can require 36 satellites at an altitude of 1500 km for global coverage, compared to 66 satellites at 780 km.

Networking Challenges

The freedom provided by computer networks can lead to unresolved social, political, and ethical issues, contributing to technological dependence and information overload.

Network Examples

A cable television network serves as an example of a Metropolitan Area Network (MAN), while home Wi-Fi networks and office Ethernet networks fall under different categories.

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Description

Test your knowledge on the fundamentals of data communications protocols. This quiz covers various aspects such as the functions of protocols, transmission mediums, and encoding methods like 4B/5B. Perfect for students and professionals looking to reinforce their understanding of networking concepts.