Mobile Devices
The stylus on an Android tablet no longer registers taps. The rest of the device works fine. What component failed?
The digitizer
A firewall is blocking outgoing email from being sent. What port number is it blocking?
What is Port 25 (SMTP)
A hypervisor is installed directly on a server with no host operating system underneath it. What type of hypervisor is this?
what is
Type 1 (bare-metal) hypervisor
$200
A user connects to Wi-Fi and gets the IP address 169.254.44.12 with no default gateway. What does this address tell you?
The DHCP server is down — this is an APIPA (link-local) address
A laptop boots normally, you can hear Windows sounds, but the screen is completely dark. Holding a flashlight to the screen reveals a faint image. What component has most likely failed?
what is The inverter or backlight
A user's iPhone won't charge with any cable, including a working cable from another iPhone. What is the most likely cause?
What is a damaged charging port
Which TWO port numbers are used by FTP for file transfers?
What are Port 20 and Port 21
A company purchases cloud services that provide hardware infrastructure only — no OS, no software. What cloud service model is this?
What is IaaS
You can ping your default gateway but cannot ping 8.8.8.8. Where is the problem?
The ISP or WAN connection — the problem is beyond the local network
A laptop user wants to connect a full keyboard, mouse, external monitor, and wired Ethernet at their desk — and disconnect everything at once when they leave. What is the best solution?
What is a docking station
A smartphone shows a completely black screen and does not respond to taps or button presses. The SIM card shows a red label but no physical damage. What is the most likely cause?
What is liquid damage
A user can receive email just fine but cannot send any. Which protocol — and port — handles the sending side?
What is SMTP - Port 25
A help desk technician needs to run multiple Windows versions on one computer to study for an exam. The computer has 4 GB of RAM. What TWO things should be done?
what is Upgrade the RAM and install Windows guest VMs
A user can ping 8.8.8.8 successfully but cannot load any websites by name. What is the cause?
DNS failure — the DNS server is not resolving hostnames
A technician replaces the LCD on a touch-screen laptop. After reassembly the display looks perfect, but touch input no longer works. What component was damaged or not reconnected?
What is The digitizer
A user's smartphone battery is bulging and physically pushing the screen away from the phone. The phone otherwise works normally. What is the correct next step?
What is Power off the phone immediately and contact support — a swollen battery is a safety hazard
Your browser shows a padlock icon and the URL begins with https://. What port is being used?
What is port 443
What is the key difference between a Type 1 and a Type 2 hypervisor?
What is it when Type 1 runs directly on the hardware (bare metal). Type 2 runs on top of a host operating system.
A new access point was installed in a downtown office building. Users immediately report intermittent wireless drops. Wired connections are fine. What should be checked first?
Channel interference — overlapping channels with neighboring access points
A laptop does not have a built-in Ethernet port. Name TWO ways to add wired network connectivity.
What is USB-to-Ethernet adapter and a docking station
An employee's personal phone is enrolled in the corporate MDM system during onboarding. What deployment strategy does this describe, and what does the acronym stand for?
What is BYOD — Bring Your Own Device
Name the protocol and port number associated with each: secure remote command-line access, Windows file sharing, and email retrieval (leaving mail on the server).
What is SSH port 22 / SMB port 445 / IMAP port 143
Name all three major cloud service models, describe what each provides to the customer, and give one real-world example of each.
IaaS = hardware/infrastructure (AWS EC2) / PaaS = development platform (Google App Engine) / SaaS = software via browser (Microsoft 365, Gmail)
A network administrator powers ceiling-mounted access points using existing Ethernet cables with no separate power outlets. What technology makes this possible and what does the acronym stand for?
What is PoE — Power over Ethernet
A laptop user opens the bottom cover. What are two components that are typically user-serviceable through the bottom panel on most modern laptops?
what is RAM (memory modules) and the storage drive (SSD or HDD)