Tech+ Mod 5 Flashcards
What numbering system uses the digits 0-7?
Octal
Which numbering system is used to represent file permissions in Linux?
Octal
How many sets of two hexadecimal numbers are in a MAC address?
6
What is a Type I hypervisor?
A hypervisor installed directly on the computer and interacts with its hardware.
Which of the following is a characteristic of a physical address?
It is assigned by the device manufacturer
What type of hypervisor is needed to use virtualization on an existing OS?
Type II hypervisor
Why do most Wi-Fi routers support multiple standards?
To ensure compatibility with both old and new devices
What format uses four sets of numbers with periods between them to represent an IP address?
Dotted decimal notation
What wireless technology requires less than 2 inches to connect?
Near Field Communication (NFC)
How can virtualization stop viruses?
By isolating the malware within a guest operating system, preventing it from infecting the host computer or network.
What is an intranet?
A private LAN for a company or organization
What is the maximum number a single byte can hold?
225
Which type of cable is most commonly used in wired networks?
Ethernet cable
What happens to Wi-Fi signal strength as you move farther from the router?
It decreases
What is a benefit of using one large server with multiple virtual servers running on it?
It reduces the overall cost of hardware and maintenance.
What happens when you connect your mobile device to Bluetooth earbuds?
You create a personal area network (PAN)
In computing, why is the hexadecimal system useful?
It uses fewer digits to represent binary numbers.
What are the three types of cables that carry Internet data?
Fiber optic cable, coaxial cable, and twisted pair copper wire
What is a virtual machine (VM)?
A guest operating system installed on a host computer using virtualization software.
What is the benefit of virtualization if a host machine is damaged?
Virtual machines can be easily moved to another physical computer
How many potential values can a single bit store?
2
What is a guest operating system (OS)?
The OS that runs inside a virtual environment
Why is a firewall important for a network connected to the internet?
It filters out bad data and protects the network
How do enterprise APs typically connect to the main network?
Using an Ethernet cable
Which type of cable is most commonly found inside houses?
Twisted pair copper wire
What device takes the signal from the modem and sends it to the switch?
Router
Which of the following best describes a Wide Area Network (WAN)?
A network that spans a large geographical area, often connecting multiple smaller networks
What is one of the best parts of small wireless networks?
They make it simple to share an internet connection.
What device is usually used to connect a LAN to a WAN?
Router
What is the traditional way of setting up and running systems and software called?
On-premises management
What is the definition of network media?
The pathways that connect computers together to share information
Which cloud service model provides physical equipment such as servers, routers, and storage?
Which cloud service model provides physical equipment such as servers, routers, and storage?
How do computers use binary to represent information?
By using combinations of only two values: 0 and 1
What is the purpose of a toner probe?
To find where a network cable starts or ends
What is the unique code that switches use to send data to the right device?
MAC address
Which cloud service model is best for businesses that want to save money and time by not handling physical servers themselves?
Infrastructure as a Service (IaaS)
What is latency in the context of internet speed?
The delay that occurs when data packets travel over the internet
The Institute of Electrical and Electronics Engineers (IEEE) established what standards for wireless communications?
802.11
How many bits does each hexadecimal digit represent in a network address?
4
How do virtual servers make the network administrator’s job easier?
They consolidate resources, making management simpler.
In a client-server model, what role does the server play?
It fulfills client requests
What is the main advantage of a WAN for a company?
Seamless communication and sharing of information
Who is responsible for overseeing a LAN?
Network Administrators
How is the 2.4 GHz frequency better than the 5 GHz frequency?
It can travel longer distances.
What is the primary purpose of the ASCII format?
To represent characters such as letters, numbers, and symbols in binary
What is the main limitation of the ASCII format?
It only supports 128 characters, primarily based on the English language
Which cloud service model is usually for developers and database administrators?
Platform as a Service (PaaS)
What is a peer-to-peer relationship in networking?
Both computers can request and provide resources
What is required for a virtual platform?
A computer, a hypervisor, and guest operating systems.
Which of the following is a characteristic of logical addresses?
They can be changed by software
What counting system do humans most commonly use?
Decimal
What unit is used to measure latency?
Milliseconds (ms)
What is virtualization?
A technology that allows multiple operating systems to run on a single computer simultaneously.
What do you need to use the latest frequency bands like 6 GHz?
A router and devices that support the latest Wi-Fi standards
What is cloud virtualization?
Making virtual copies of computer resources and putting them on rented server space.
What is the term for unique numbers assigned to different types of network traffic?
Network Ports
What is one advantage of using virtual machines for training?
It allows students to practice using a live operating system without impacting the production environment.
What is a network interface card (NIC)?
A device that connects a computer to a network
What is a WLAN?
A type of wireless network
Which cloud service model allows you to use a program through your web browser over the Internet?
Software as a Service (SaaS)
What is the effect of interference on a Wi-Fi signal?
Decreased signal strength and network speed
How does a hypervisor manage the CPU for virtual machines?
It divides the real CPU so multiple virtual machines can use it.
What is the smallest unit of measure for a computer?
Bit
What do you call a group of computer systems connected to share information?
A network
Besides a network administrator, how can IP addresses be assigned?
By DHCP (Dynamic Host Configuration Protocol)
What is a private cloud?
A cloud environment set up just for authorized users within an organization
How many bytes are in a kilobyte (KB)?
1024
What is a “sandbox” in the context of virtual servers?
A virtual environment for testing new apps and programs safely.
What frequency bands are available if you are using Wi-Fi 6G or 6E?
2.4 GHz, 5 GHz, and 6 GHz
What does a byte represent in computing?
A group of 8 bits
What is the risk of having a WiFi network without encryption?
Unwanted people can access the network
What is a MAN?
A network that covers a city
What does Unicode provide that ASCII does not?
Support for emojis
What is a “ping” test used for?
Measuring latency
What is an example of Software as a Service (SaaS)?
Gmail
What is the main reason for transitioning from IPv4 to IPv6?
IPv4 addresses are running out.
What does LAN stand for?
Local Area Network
What is one advantage of using multiple guest OSs on a single physical computer?
They can perform different tasks independently
How is the 5 GHz frequency better than the 2.4 GHz frequency?
It has less interference from other devices
What can the hypervisor do if a virtual machine needs more memory?
It can assign more memory from the real computer to the virtual machine.
How many wires are inside an Ethernet cable?
8
What type of router is best suited for small offices or homes?
Consumer router
What is container virtualization?
A lighter way to run many apps without them interfering with each other.
What is the role of a firewall in a LAN?
To block unauthorized access
What does a cable tester do?
Checks if a cable is working
How many bits are in an IPv6 address?
128
What is the base of the hexadecimal numbering system?
16
What is a SOHO network?
A network for small offices or home offices
What property of radio waves is described as the height of peaks and the depth of troughs?
Amplitude
What does an RJ-45 plug connect to?
A network socket
What is the purpose of network protocols?
To create a common set of rules for network communication
What is a hybrid cloud?
A combination of public and private cloud models
What is port forwarding?
A way to send network traffic to a new address
Why is it useful to learn how to make Ethernet cables yourself?
You can make cables of specific lengths
What should you do to make your router more secure?
Change the SSID and password
What is the primary purpose of a VPN for remote users?
To create a secure connection over the Internet for remote users
Which type of hypervisor requires an existing operating system to run?
Type 2
What is the role of a hypervisor in virtualization?
It manages the virtual machine environment and facilitates interaction with the host hardware and network.
What is a MAC address?
A unique hexadecimal number hardcoded in a device
What feature allows switches to send electricity through Ethernet cables?
PoE
Why is WEP considered insecure today?
It is easily hacked
Which 802.11 standard was the first to allow more than one frequency band?
802.11n
Which port number is used for secure web communication?
443
What is the main function of a modem?
To translate signals from the ISP into a form your devices can understand
How many bits are in an IPv4 address?
32
What is attenuation in the context of Wi-Fi signals?
The loss of signal strength as you move away from the router
What device is commonly used to connect computers in a LAN?
Switch
Which of the following hexadecimal digits represents the decimal number 15?
F
Why is a Type 1 hypervisor also known as a bare-metal hypervisor?
Because it runs directly on the computer hardware without needing an operating system
What is a public cloud deployment?
A cloud environment shared among many unrelated organizations
Which port number is used for the Hypertext Transfer Protocol (HTTP)?
80
What tool is used to connect an RJ-45 cable to its clip?
Crimper
Which computer component is not needed to share information on a network?
Network storage
What is the main difference between managed and unmanaged switches?
Managed switches can be configured, unmanaged switches cannot
Which of the following is an example of a network in daily life?
Using a debit or credit card at a store
What is the primary function of a wireless access point (AP)?
To enable wireless devices to connect to the network
What is a VLAN?
A logical network segment within a larger network
What is a pre-shared key?
A password used to access a wireless network
What is the current standard for WiFi encryption that is considered very secure?
WPA3
What is the easiest way to add Wi-Fi to a desktop computer that doesn’t have it built-in?
Use a USB wireless adapter
