Networking
What does DNS do, and why is it important?
It translates domain names into IP addresses so users can access websites without remembering numerical addresses.
What is the purpose of RAM?
Temporary storage for currently running programs and data.
What is phishing?
Phishing is a social engineering attack in which attackers try to steal passwords or personal information by pretending to be trustworthy.
ranslate:
„Könnten Sie bitte Ihren Computer neu starten?"
Could you please restart your computer?
Alternative:
Would you mind restarting your computer?
Explain the difference between update and upgrade.
Update
Upgrade
Explain the difference between a switch and a router.
A switch connects devices within the same local network, while a router connects different networks and forwards packets between them.
Why is an SSD usually faster than an HDD?
Because it has no moving parts and offers much faster read/write speeds.
Explain the difference between authentication and authorization.
Authentication verifies who you are.
Authorization determines what you are allowed to access.
Example:
Login = authentication
Access to shared folders = authorization
A customer says:
"Nothing works."
Ask three professional follow-up questions.
Find the mistake.
Yesterday I have installed the new firewall.
Yesterday I installed the new firewall.
(Use the Simple Past because "yesterday" refers to a finished time.)
A user receives an APIPA address (169.254.x.x).
What is the most likely problem?
The computer failed to obtain an IP address from the DHCP server.
our PC suddenly shuts down while rendering videos.
Suggest two possible hardware-related causes.
A colleague receives an email asking him to verify his Microsoft account.
Rephrase professionally:
"You did something wrong."
Explain "Cloud Computing" without saying:
"It allows users to store files, run applications and access computing resources remotely instead of using only their local computer."
Why would a company choose VLANs instead of putting all devices into one network?
To improve security, reduce broadcast traffic, separate departments, and simplify network management.
Explain the difference between BIOS and UEFI.
UEFI is the modern firmware interface replacing BIOS. It supports larger disks, Secure Boot, faster startup, and additional features.
What is Multi-Factor Authentication?
Give one advantage and one disadvantage.
Using two or more authentication factors.
Examples:
Advantages:
Disadvantages:
The printer is offline.
Name four things you would check.
Explain RAID 1 to a customer with no IT knowledge.
RAID 1 stores the same data on two hard drives. If one drive fails, the other still contains all the data. It improves reliability but not storage capacity.
A PC can ping its default gateway but cannot access websites.
Name three possible causes.
A customer wants a workstation for virtualization.
Recommend three hardware upgrades and explain why.
A ransomware attack has encrypted several servers.
What are your first three actions?
A customer asks:
"What is a VPN, and why do I need it?"
Explain it in English without using technical jargon.
A VPN creates a secure connection between your computer and your company's network. It protects your data when you work from home or use public Wi-Fi, so other people cannot easily see your information.
Spot the Mistakes!
The following email contains 10 mistakes (grammar, vocabulary, spelling or style).
Find and correct as many as possible.
Hello Mr. Smith,
Yesterday our server crash and all users was unable to access there files.
We have fixed the problem and everythings is working normal again.
Please don't hesitate to contact us if you have any question.
Best Regard,
Alex
Hello Mr. Smith,
Yesterday our server crashed, and all users were unable to access their files.
We have fixed the problem, and everything is working normally again.
Please don't hesitate to contact us if you have any questions.
Best regards,
Alex