A+ Flashcards
(204 cards)
Order these technologies from lowest throughput to highest:
A. SATA revision 3.0 B. Satellite Networking C. USB 3.0 D. One stream of 802.11ac E. 1000BASE-T
lowest to highest
B. Satellite networking: 50 Mbit/s D. One stream of 802.11ac: 866.7 Mbit/s E. 1000BASE-T 1Gbit/s C. USB 3.0 5 Gbit/s A. SATA revision 3.0 6 Gbit/s
Each time a computer starts, it shows a date and time error. Which of the following would be the most likely reason for this issue.
A. Certificate error B. Incorrect time zone setting C. Bluetooth not connected D. Bad motherboard battery E. Network disconnected
D. Bad motherboard battery
A smartphone has been configured to retrieve email messages over tcp/110. which of the following would most likely be using this configuration?
A. SMTP B. POP3 C. outlook.com D. S/MIME E. IMAP4
B. POP3
Which of the following would be there best way to create a wire map of an ethernet cable?
A. Multimeter B. Loopback plug C. Punch-down tool D. WiFI analyzer E. Crimper
A. Multimeter
- checks ac voltage
- dc voltage
- continuity
- one probe on a cable on one side, and the other end on the other side. If it makes a noise, those wires are connected
- can easily create a wire map with how the wire goes all the way through
- pin to pin connections
A system admin has connected an external USB drive to a computer to transfer some documents. When booting the computer, the system tries to boot from the external drive and gives an error message. Which of the following would be the BEST way to prevent the USB drive from booting?
A. Modify the BIOS to boot from the internal hard drive
B. Modify the boot order in Windows Disk management
C. Rebuild the MBR on the external hard drive
D. Disable the external drive in Device Manager
A. Modify the BIOS to boot from the internal hard drive
The boot order is managed in the system BIOS, and one way to avoid the computer from attempting to boot from an external storage device is to move the internal driver to have a higher boot priority.
What type of storage would include both a spinning drive and memory
A. SSD B. EEPROM C. NVMe D. Blu-ray E. SSHD
E. SSHD
Which of the following is used to manage a virtual machine platform and guest operating systems?
A. UEFI BIOS B. Hypervisor C. Resource Pooling D. SaaS E. Emulator
B. Hypervisor
- virtual machine manager
- manages the virtual platform and guest operating systems
- may require a cpu that supports virtualization
- hardware management
- cpu
- networking
- security
A system administrator is configuring an IoT device using a direct wireless connection to the device. Which of the following would describe this connection?
A. 802.1X B. Bonjour C. Centronics D. TIA 568B E. Ad hoc
E. Ad hoc
- when you do not have an access point you need to communicate directly to the device
- IoT
- no keyboard input on a garage door opener
List the protocol (tcp or udp) and the port number:
A. Automatically assign an IP address (two ports)
B. Retrieve an email to a mobile phone using POP3
C. Resolve the IPD address of www.professormesser.com
D. Manage the console of a remote device (insecurely)
E. Control the mouse on a remote Windows computer
A. DHCP UDP/67 and UDP/68 B. TCP/110 POP3 C. UDP/53 (DNS) D. Telnet TCP/23 E. TCP 3389 (RDP)
A user is not able to send emails from their mobile phone. Which of the following would be the MOST likely problem?
A. IMAP4 B. SMB C. SMTP D. POP3 E. AFP
C. SMTP
- Simple mail transfer protocol
- Send mail from a device to a mail server
- or between mail servers
- you usually must send from a local or trusted device
- Authentication usually required
- may be different credentials than the incoming mail
- port numbers
- SMTP (no authentication, relatively unused): tcp/25
- SMTP with authentication: tcp/587
A hospital uses a wireless network using 2.4 GHz with a maximum throughput of 54 Mbit/s. Which standard is the hospital using?
A. 802.11a B. 802.11b C. 802.11g D. 802.11n E. 802.11ac
C. 802.11g
- an “upgrade to 802.11b
- june 2003
- operates in the 2.4 GHz range
- 54 megabits per second (Mbit/s)
- same as 802.11a (but a little bit less throughput)
- backwards compatible with 802.11b
- same frequency conflict problems as 802.11b
A user has powered on their computer and received the message “Operating system not found.” A check of the system shows that the hard drive cables are properly connected. Which of the following would be the NEXT best troubleshooting step?
A. Boot to safe mode
B. Replace the boot drive
C. Restore from a known good backup
D. Check for removable drives
D. Check for removable drives
-If a USB storage device is connected to a computer and the BIOS is checking USB devices before the primary storage drive, the “operating system not found” error could appear with some USB devices. To avoid this error, the boot order in the BIOS can be changed, or the USB device can be disconnected during the boot process and reconnected after the operating system has started.
Which of these technologies is used by ECC to identify errors?
A. Striping B. Multi-channel C. DDR D. Mirroring E. Parity
E. Parity
- even parity
- the parity bit makes an even number
- see parity in notes for graphic chart with numbers
Which of these cloud models provides only CPU, storage, memory, and network access?
D. IaaS
- infrastructure as a service
- sometimes called hardware as a service (HaaS)
- outsource your equipment
- you’re still responsible for the management
- and security
- your data is out there, but more within your control
- Web server providers
A drive in RAID 1 array has failed. Which of the following would return the array to a fully operational state?
A. Replace all drives and restore from backup
B. Replace the bad drive and resync
C. Replace all drives and resync
D. Replace the bad drive and restore from backup
B. replace the bad drive and resync
A phone has received a tower update over the existing cellar network connection. Which of the following would BEST describe this update?
A. PRL B. IMEI C. iOS D. IMSI E. PRI
A. PRL
- phone updates
- preferred roaming list
- CDMA networks (i.e., Verizon, sprint)
- allows your phone to connect to the right tower
- can be updated over the air (OTA)
A company is using pre-built modules on a cloud service provider to create a customer inventory application. Which of the following would BEST describe this implementation?
A. IaaS B. Peer-to-peer C. SaaS D. Hybrid E. PaaS
E. PaaS
- platform as a service
- no servers, no software, no maintenance team, no HVAC
- someone else handles the platform, you handle the development
- you don’t have direct control of the data, people, or infrastructure
- trained security professionals are watching your stuff
- put the building blocks together
- develop your app from what’s available on the platform
- salesforce.com
A user is authenticating to a VPN concentrator. Which of the following ports would be MOST likely be used?
A. tcp/389 B. tcp/548 C. tcp/22 D. tcp/3389 E. udp/161
A. tcp/389
- LDAP (lightweight directory access protocol)
- store and retrieve information in a network directory
- commonly used in Microsoft active directory
A system admin is configuring an IoT device using a direct wireless connection the device. Which of the following would describe this connection?
A. 802.1x B. Bonjour C. Centronics D. TIA 568B E. Ad hoc
E. Ad hoc
- wireless device sharing
- ad hoc mode
- no access point
- direct link between wireless devices
When a user starts their computer, the screen remains blank and the computers beeps twice. Which of these would be the most likely cause of this issue?
A. The boot device is not connected
B. The memory is faulty
C. The operating system has become corrupted
D. The PC is infected with malware
B. The memory is faulty
-The POST (power on self test) is the initial hardware check that occurs during the startup process. If a major hardware component is faulty, the computer will beep and a message will be displayed on the screen. If the issue is related to a critical component, the computer will not be able to display a message on the screen and instead will beep a certain number of times as a code to specify the error
A cloud application is designed to add and remove resources as the load changes. Which of the following would describe this characteristic?
A. Fault tolerant B. Rapid elasticity C. Metered D. community E. Resource pooling
B. Rapid elasticity
- scale up and scale down as needed
- seamless to everyone
A user is sending a job to the printer, but the printer is not responding to any print requests. Which of the following would be the first step when troubleshooting this issue?
A. Update the printer driver B. Perform a test print from the printer C. Change the printer configuration from PostScript to PCL D. Replace the fuser E. Upgrade the printer firmware
B. Perform a test print from the printer
A system admin has upgraded a system by replacing a single memory module with two separate modules. Which of the following would describe this upgrade?
A. Multi-channel B. RAID 1 C. Multi-core D. ECC E. Hyper-threading
A. Multi-channel
- Memory module = RAM stick
- single channel to dual-channel upgrade
Sort these technologies from lowest throughput to highest:
A. One stream of 802.11n B. SATA revision 2.0 C. Thunderbolt v3 D. 100BASE-T E. USB 3.0
D. 100BASE-T: 100 Mbps/sec A. One stream of 802.11n: 150Mbps/sec B. SATA revision 2.0: 3 Gbps/sec E. USB 3.0: 5 Gbps/sec C. Thunderbolt v3: 40 Gbps/sec