Network Devices and Shell Scripting Quiz

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Questions and Answers

Which network device is used to connect two or more network segments and reduce collisions?

Bridge

Repeater

Router

Hub (correct)

How do we comment in a shell script?

# (correct)

//&

What is the range of IP addresses for a Class B network?

224.0.0.0 to 239.255.255.255

128.0.0.0 to 191.255.255.255 (correct)

1.0.0.0 to 126.0.0.0

192.0.0.0 to 223.255.255.255

What is the NTFS file system?

A file system developed by Microsoft Signup and view all the answers

Which service is used to anonymously browse the internet by hiding the user's IP address?

Proxy Server Signup and view all the answers

Which class of IP addresses has the default subnet mask of 255.255.0.0?

Class B Signup and view all the answers

What is the purpose of the 'Scan for hardware changes' option in the Device Manager?

To detect new hardware Signup and view all the answers

Which of the following commands in Linux is used to change the current working directory?

cd Signup and view all the answers

What is a DNS zone?

A collection of DNS records for a specific domain Signup and view all the answers

What does the 'cat' command do in Linux?

Display the contents of a file Signup and view all the answers

What is a database server?

A computer that stores and manages databases Signup and view all the answers

Which port number is used for the SSH protocol?

22 Signup and view all the answers

What is the Device Manager used for?

Managing hardware devices Signup and view all the answers

Which layer of the OSI model is responsible for flow control?

Transport Signup and view all the answers

To fix hardware problems, which action is typically performed?

Detecting newly installed or modified hardware Signup and view all the answers

How do you enter a formula in OpenOffice Calc?

Type the formula directly in a cell Signup and view all the answers

Which network security device can monitor and analyze network traffic to identify potential threats?

IDS Signup and view all the answers

Which type of attack involves overwhelming a network with a flood of traffic to disrupt service?

Denial of Service (DoS) Signup and view all the answers

What is the most common type of connector used in Ethernet cables?

RJ-45 Signup and view all the answers

Which device allows multiple computers to share a single Internet connection?

Router Signup and view all the answers

Which technology is used to ensure that data has not been altered during transmission?

Hashing Signup and view all the answers

What is the primary purpose of a Demilitarized Zone (DMZ) in network security?

To isolate public-facing services from the internal network Signup and view all the answers

What is the function of a load balancer in a network?

To distribute traffic across multiple servers Signup and view all the answers

Why do we use single quotes and double quotes in a shell script?

Single quotes treat all characters literally, while double quotes allow variable expansion. Signup and view all the answers

Which class of IP addresses is typically used for small networks with up to 254 hosts?

Class C Signup and view all the answers

What power conversion is performed by a power supply unit (PSU)?

AC power to DC power Signup and view all the answers

When removing a CPU cooler, what is the most important precaution to take?

Avoid touching the CPU core Signup and view all the answers

What device is used to connect multiple devices within a single network segment?

Switch Signup and view all the answers

Which unit is commonly used to measure the speed of a CPU?

Hertz Signup and view all the answers

What type of software license grants permission to use the software?

Permission to use the software Signup and view all the answers

Which component is responsible for storing the BIOS?

ROM Signup and view all the answers

What is the main purpose of a modem in networking?

To convert digital signals to analog signals Signup and view all the answers

What is the main purpose of the 'xargs' command in a shell script?

Builds command lines from standard input Signup and view all the answers

What is the intended use of the 'test' command or square brackets [ ] in a shell script?

To test conditions and make decisions Signup and view all the answers

Which of the following accurately describes what a hub is?

A network device that connects multiple devices together Signup and view all the answers

Which of the following is NOT a core component of OpenOffice?

Excel Signup and view all the answers

What is DHCP commonly referred to as?

Dynamic Host Configuration Protocol Signup and view all the answers

What does the 'return' statement in a shell script function accomplish?

To return a value from the function Signup and view all the answers

Which of the following best defines SNMPv3?

The latest version of SNMP with improved security Signup and view all the answers

In what scenario is the 'test' command often utilized?

Evaluating conditional expressions Signup and view all the answers

Study Notes

Network Devices

Hub: Connects multiple devices in a network segment
Bridge: Connects two or more network segments to reduce collisions
Router: Connects different network segments and forwards data packets between networks
Repeater: Amplifies network signals to extend network range
Switch: Directs data packets to their destination based on MAC address, improving efficiency
Firewall: Monitors and analyzes network traffic to identify potential threats and block malicious activity
IDS (Intrusion Detection System): Monitors network traffic for suspicious activity and alerts administrators
Load Balancer: Distributes traffic across multiple servers to improve performance and prevent overload

Shell Scripting

cd: Change directory
#: Comment in a shell script
test or [ ]: Used to test conditions and make decisions in a shell script
xargs: Builds command lines from standard input
return: Returns a value from a shell script function

Networking Concepts

DNS Zone: A collection of DNS records for a specific domain
DHCP (Dynamic Host Configuration Protocol): Automatically assigns IP addresses to devices in a network
Subnet Mask: Defines the network portion and the host portion of an IP address
Class A IP Addresses: Range: 1.0.0.0 to 126.0.0.0
Class B IP Addresses: Range: 128.0.0.0 to 191.255.255.255
Class C IP Addresses: Range: 192.0.0.0 to 223.255.255.255
DMZ (Demilitarized Zone): A network security zone that isolates public-facing servers from an internal network
DoS (Denial of Service) Attack: Overloads a network with a flood of traffic to disrupt service

File Systems and Services

NTFS (New Technology File System): A file system developed by Microsoft
SSH (Secure Shell) Protocol: Uses port 22 for secure remote login and data transfer
SNMP (Simple Network Management Protocol): Used for monitoring and managing network devices
SNMPv3: The latest version of SNMP, providing improved security

Computer Hardware and Software

CPU (Central Processing Unit): Measured in Hertz (Hz), responsible for executing instructions
PSU (Power Supply Unit): Converts AC power to DC power to supply components
BIOS (Basic Input/Output System): Stored on ROM chip, provides initial instructions for booting
Device Manager: Used for managing hardware devices connected to a computer

OpenOffice Suite

OpenOffice Draw: Used for creating vector graphics, diagrams, and presentations
OpenOffice Calc: A spreadsheet program
OpenOffice Writer: A word processor
OpenOffice Impress: A presentation software

General Concepts

IP Address: A unique identifier assigned to a device on a network
MAC Address: A physical address that identifies a network interface card
Encryption: Converts data into an unreadable format to protect it during transmission
Hashing: Creates a unique fingerprint of a data set to ensure its integrity
Phishing: A method of social engineering used to steal personal information

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Description

Test your knowledge on key network devices such as routers, switches, and firewalls, alongside basic shell scripting commands and functions. This quiz covers essential concepts that are vital for IT professionals and computer science students.