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Questions and Answers
Which network device is used to connect two or more network segments and reduce collisions?
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?
How do we comment in a shell script?
- # (correct)
- //&
- '
- //
What is the range of IP addresses for a Class B network?
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?
What is the NTFS file system?
Which service is used to anonymously browse the internet by hiding the user's IP address?
Which service is used to anonymously browse the internet by hiding the user's IP address?
Which class of IP addresses has the default subnet mask of 255.255.0.0?
Which class of IP addresses has the default subnet mask of 255.255.0.0?
What is the purpose of the 'Scan for hardware changes' option in the Device Manager?
What is the purpose of the 'Scan for hardware changes' option in the Device Manager?
Which of the following commands in Linux is used to change the current working directory?
Which of the following commands in Linux is used to change the current working directory?
What is a DNS zone?
What is a DNS zone?
What does the 'cat' command do in Linux?
What does the 'cat' command do in Linux?
What is a database server?
What is a database server?
Which port number is used for the SSH protocol?
Which port number is used for the SSH protocol?
What is the Device Manager used for?
What is the Device Manager used for?
Which layer of the OSI model is responsible for flow control?
Which layer of the OSI model is responsible for flow control?
To fix hardware problems, which action is typically performed?
To fix hardware problems, which action is typically performed?
How do you enter a formula in OpenOffice Calc?
How do you enter a formula in OpenOffice Calc?
Which network security device can monitor and analyze network traffic to identify potential threats?
Which network security device can monitor and analyze network traffic to identify potential threats?
Which type of attack involves overwhelming a network with a flood of traffic to disrupt service?
Which type of attack involves overwhelming a network with a flood of traffic to disrupt service?
What is the most common type of connector used in Ethernet cables?
What is the most common type of connector used in Ethernet cables?
Which device allows multiple computers to share a single Internet connection?
Which device allows multiple computers to share a single Internet connection?
Which technology is used to ensure that data has not been altered during transmission?
Which technology is used to ensure that data has not been altered during transmission?
What is the primary purpose of a Demilitarized Zone (DMZ) in network security?
What is the primary purpose of a Demilitarized Zone (DMZ) in network security?
What is the function of a load balancer in a network?
What is the function of a load balancer in a network?
Why do we use single quotes and double quotes in a shell script?
Why do we use single quotes and double quotes in a shell script?
Which class of IP addresses is typically used for small networks with up to 254 hosts?
Which class of IP addresses is typically used for small networks with up to 254 hosts?
What power conversion is performed by a power supply unit (PSU)?
What power conversion is performed by a power supply unit (PSU)?
When removing a CPU cooler, what is the most important precaution to take?
When removing a CPU cooler, what is the most important precaution to take?
What device is used to connect multiple devices within a single network segment?
What device is used to connect multiple devices within a single network segment?
Which unit is commonly used to measure the speed of a CPU?
Which unit is commonly used to measure the speed of a CPU?
What type of software license grants permission to use the software?
What type of software license grants permission to use the software?
Which component is responsible for storing the BIOS?
Which component is responsible for storing the BIOS?
What is the main purpose of a modem in networking?
What is the main purpose of a modem in networking?
What is the main purpose of the 'xargs' command in a shell script?
What is the main purpose of the 'xargs' command in a shell script?
What is the intended use of the 'test' command or square brackets [ ] in a shell script?
What is the intended use of the 'test' command or square brackets [ ] in a shell script?
Which of the following accurately describes what a hub is?
Which of the following accurately describes what a hub is?
Which of the following is NOT a core component of OpenOffice?
Which of the following is NOT a core component of OpenOffice?
What is DHCP commonly referred to as?
What is DHCP commonly referred to as?
What does the 'return' statement in a shell script function accomplish?
What does the 'return' statement in a shell script function accomplish?
Which of the following best defines SNMPv3?
Which of the following best defines SNMPv3?
In what scenario is the 'test' command often utilized?
In what scenario is the 'test' command often utilized?
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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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