CompTIA A+ Core 1 General Practice

Zigbee

Open-source wireless communication protocol used for home automation

Which motherboard connection is used to connect wireless network adapter cards?

PCIe x1

Which motherboard connection is used to connect wireless graphics cards?

PCIe x16

What port in the firewall blocks http access?

Port 80

What port in the firewall blocks https access?

Port 443

Which has more downtime, A virtual machine or physical server?

Physical server

What causes the “Pinwheel of death”?

Failure or corruption of memory

What to do when OS not found

Repair the GPT

Molex

4-pin power connectors

CMOS battery

Powers the motherboard when the computer is off

What port is used by SNMP by default?

Port 161

Digitizer

Touch-sensitive glass panel covering an LCD

IMAP

Synchronizes mail to all devices

Which Wi-Fi channels in the 2.4 GHz frequency band are only supported in Europe and Japan?

13

An address of ::1 is?

Loopback IPv6

An address of 127.0.0.1 is?

Loopback IPv4

DHCP server

Allows IP addresses to automatically get assigned

What ports do SMB use?

Port 139 and 445

Inverter

Powers the backlight source for an LCD screen

What cellular technology uses HSPA+ and EV-DO?

3G

What port does SLP use?

Port 427

What causes double images or ghost printing?

Drum

What port does LDAP use?

Port 389

What technology allows tap to pay?

NFC

SaaS

Cloud computing concept focused on the replacement of applications and programs with cloud-based resources

DaaS

Cloud service used to deliver virtual desktops to end-users over the Internet on a per-license basis

RJ-45

Terminate CAT 5e network cables

RJ-11

Terminate phone line cables

What does a clicking noise in a RAID device indicate?

Failing hard drive

What ports need to be open for FTP connection?

Port 20 and 21

VM escape

Malware running on a guest OS jumping to another guest or host

What type of IP address should be used for client workstations and devices?

Dynamic

IDE

40-pin ribbon cable

What can a bad or faulty RAM module cause

Continuous system reboots

What connection-oriented protocol uses TCP?

HTTPS

Hyperthreading

CPU technology that allows a processor to utilize multiple logical cores

Multi-core processor

CPU technology that allows a processor to utilize multiple physical cores

Rapid elasticity

Can be a security concern while using cloud service providers because it could result in a data breach from data remnants

POP3

Provides a means for a client to access email messages stored in a mailbox on a remote server. The server usually deletes messages once the client has downloaded them

What port does POP3 use?

Port 110

What error shows when a computer is not recognizing a hard drive

No boot device available

IaaS

Provides instant access to servers and switches available for management over the internet

What is the first thing to do when approaching a problem

User error

QoS

Using a network protocol to prioritize certain traffic types over others

What port to use to prevent a remote login to a server?

Port 22

What type of network cable prevents crosstalk or interference?

STP

S.M.A.R.T

Monitors a hard drive ensuring it performs properly

What type of printer uses filement?

3-D

What channel numbers can you select between on 2.4GHz frequencies in the US?

1-11

Impact printer

Used to create multiple copies of a document at once with a ribbon it pushes against the paper using dots to create the image

Hypervisor

Process that creates and runs virtual machines

What port does RDP operate on?

Port 3389

What type of memory module do laptops use?

SODIMM

RAID 1

Provides mirroring (redundancy) and fault tolerance but not disk striping with a minimum of 2 disks

RAID 0

Provides disk striping (speed/performance) but not mirroring(redundancy) or fault tolerance with a minimum of two disks

RAID 5

Provides block-level striping with redundancy using a minimum of three disks

RAID 10

Combines disk mirroring (redundancy) and disk striping using a minimum of four disks

CompTIA troubleshooting methodology

Identify the problem, Establish a theory, Test the theory, Establish a plan and implement solution, Verify full system functionality and implement preventative measure, Document findings

What would cause a wireless networks SSID to not be displayed?

Broadcast being disabled

Gateway

The IP address of a router which packets destined for a remote network should be sent by default

Loopback plug

Used to test ports

Virtualization technology supported by most modern Intel processors?

VT

What cell technology was only used in the US?

CDMA

What part of a laptop required de-soldering?

DC jack

Tone generator and probe

Used to detect which cable is attached to a wall jack

Best way to share a printer?

Share it via localhost

When does incorrect chroma display occur on a printer?

When it is not calibrated to use the same color profile as the monitor

Which RAID solution has the best speed and redundancy?

RAID 10

Accelerometer

Tracks physical movement in every direction

NFC

Allows two devices to establish a wireless connection by being close to one another

Keystone

Effect that occurs when the top of a projected image is wider or narrower than the bottom of an image

What port does TFTP use?

Port 69

Bonjour

Networking protocol used by macOS to find available printers on the network

What port is used by NetBIOS to share files and printers on a network?

Port 139

What port does SFTP use?

Port 22

DHCP uses what ports?

Port 67 and 68

Virtual NIC

Adapter that provides a interface to help connect VMs to a network

When using a Wireless B or G network what channels should you use to prevent overlapping frequencies?

Channels 1, 6, and 11

How to increase lifespan of an SSD?

Disable regularly scheduled defragmentation

PostScript

Page description language that produces higher quality output at the expense of speed

Tray

Controls the size of the paper used for a print job

Defragment

When file fragments are put together to speed up file access

Duplex

Allows the printing of a sheet of paper on both sides automatically

Steps of laser printer imaging process

Processing, charging, exposing, developing, transferring, fusing, and cleaning

If CPU has no power what happens

POST would not complete

If Motherboard has no power what happens

Motherboard LEDs do not get lit

If Hard drive has no power what happens

SATA cable is not connected and error message saying “bootable device not found” shows up

WiFi Analyzer

Tool used to identify why an 802.11g network is intermittently dropping network traffic

SaaS

Allows users to connect to and use cloud-based apps over the internet

Cat6a

Supports speeds of 10Gbps

Cat5e

Supports speeds of 1Gbps

DKIM

Provides cryptographic authentication mechanism for email

What type of connection allows for high-speed bi-directional data communication over a HFC connection?

Cable

What connection-oriented protocol uses TCP?

SSH

What does distended capacitors indicate?

Dead motherboard

MDM

Designed to manage the use of smartphones and tablets within an enterprise

TPM

Hardware based cryptographic processing component that is part of the motherboard

On-demand

Allows users to store files on a cloud-based server and put it back on the device when space once again becomes available

IOPS

Measurement of performance to compare HDD and SSD

Which key to press to enter boot order menu?

F12