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Quizzes > Computers & IT

IT Quiz: Test Your Knowledge of Networks, Cybersecurity, and Software

Quick, free information technology test. Instant results with explanations.

Editorial: Review CompletedCreated By: Shep ShepherdUpdated Aug 27, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration with network nodes, server, lock, gear, code symbols on coral background for IT quiz

This IT quiz helps you check your information technology skills across networks, cybersecurity, hardware, and software in minutes with quick, real-world questions. Warm up with an it test for beginners, build confidence with an it knowledge test, or dive deeper on hardware in a computer hardware quiz.

Which port does HTTPS use by default?
443
21
80
22
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What device operates at OSI Layer 3 to forward packets between networks?
Switch
Router
Hub
Bridge
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In relational databases, which SQL command removes rows that meet a condition?
ALTER
DROP
DELETE
TRUNCATE
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Which file system is the default for many modern Linux distributions?
HFS+
FAT32
NTFS
ext4
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Which metric indicates the clock speed of a CPU?
ms
GHz
GB
IOPS
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Which DNS record type maps a hostname to an IPv4 address?
CNAME record
AAAA record
A record
MX record
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Which command-line tool displays active network connections on Windows?
netstat
tracert
ipconfig
arp
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Which RAID level can tolerate a single disk failure using parity?
RAID 0
RAID 5
RAID 1
RAID 10
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What is the primary purpose of a VLAN in a network?
To segment a Layer 2 network into isolated broadcast domains
To provide WAN connectivity
To encrypt all traffic end-to-end
To resolve hostnames to IP addresses
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Which algorithm is designed specifically for password hashing with salting and a work factor?
MD5
CRC32
bcrypt
SHA-1
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Which hypervisor type runs directly on bare-metal hardware?
Type 1
Type 2
Hosted
Paravirtual
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In object-oriented programming, what does encapsulation refer to?
Bundling data with methods and restricting direct access
Sharing code across classes
Creating new objects from classes
Converting one type to another
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Which backup type copies only data that changed since the last backup of any type and clears the archive bit?
Synthetic full
Full backup
Differential backup
Incremental backup
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Which disk performance metric measures the time to position the read/write head over the correct track?
Throughput
IOPS
Latency due to rotation
Seek time
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Which VPN technology uses IKE over UDP ports 500 and 4500 to establish secure tunnels?
PPTP
L2TP without IPsec
GRE
IPsec
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Which operating system scheduling algorithm selects the process with the smallest remaining processing time next?
First-Come, First-Served
Shortest Remaining Time First (SRTF)
Round Robin
Priority Scheduling (non-preemptive)
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In TLS, which extension allows hosting multiple HTTPS sites with different certificates on a single IP address?
OCSP stapling
ALPN
HSTS
Server Name Indication (SNI)
undefined
Which IPv6 transition mechanism tunnels IPv6 over UDP to traverse NAT devices?
6to4
Teredo
NAT64
Dual stack
undefined
Which garbage collection approach separates heap into young and old generations to optimize for short-lived objects?
Copying collector only
Reference counting only
Mark-sweep only
Generational garbage collection
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Which memory consistency model ensures operations appear in a single total order consistent with each thread's program order?
Eventual consistency
Causal consistency
Strict two-phase locking
Sequential consistency
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0

Study Outcomes

  1. Understand Networking Fundamentals -

    Grasp core concepts like IP addressing, protocols, and network topologies to build a solid foundation for the proprofs com quiz.

  2. Identify Cybersecurity Threats -

    Recognize common vulnerabilities, attack methods, and protective measures to strengthen your response skills in this IT quiz online.

  3. Differentiate Hardware Components -

    Distinguish between CPUs, memory, storage, and peripherals to accurately address hardware-based questions in this information technology quiz.

  4. Explain Software Essentials -

    Describe various software types, from operating systems to applications, and understand their roles in computing environments.

  5. Apply IT Terminology Accurately -

    Use precise IT language and definitions to enhance your performance on IT trivia questions.

  6. Evaluate Your IT Proficiency -

    Measure and reflect on your knowledge across networking, cybersecurity, hardware, and software domains through the proprofs.com quiz.

Cheat Sheet

  1. OSI Model Layers -

    The OSI (Open Systems Interconnection) model breaks down network communication into seven layers, from Physical to Application, helping you troubleshoot by isolating issues layer by layer. Mnemonic trick: "Please Do Not Throw Sausage Pizza Away" can help you recall Physical, Data Link, Network, Transport, Session, Presentation, Application. (Source: Cisco Networking Academy)

  2. TCP vs UDP Protocols -

    TCP is connection-oriented, ensuring reliable, ordered delivery with error checking and acknowledgments, while UDP is connectionless and faster but can lose packets - ideal for streaming or gaming. Remember: "T"=Trustworthy (guaranteed delivery), "U"=Unburdened (low overhead). (Source: RFC 791, RFC 768)

  3. Symmetric vs Asymmetric Encryption -

    Symmetric encryption (e.g., AES-256) uses one secret key for both encryption and decryption, offering speed but requiring secure key exchange; asymmetric encryption (e.g., RSA-2048) uses a public/private key pair for secure digital signatures and key exchange. Tip: "Symmetric = Same key, Asymmetric = Access two." (Source: NIST Special Publication 800-57)

  4. RAID Storage Levels -

    RAID 0 stripes data across disks for performance (no redundancy), RAID 1 mirrors data for fault tolerance, and RAID 5 stripes with parity for a balance of speed and protection - surviving one disk failure. Example: Four drives in RAID 5 provide effective capacity of three drives while tolerating one disk fault. (Source: VMware Documentation)

  5. IPv4 vs IPv6 Addressing -

    IPv4 uses 32-bit dotted decimal (e.g., 192.168.0.1) and supports ~4.3B addresses, while IPv6 uses 128-bit hex (e.g., 2001:0db8::1) for virtually unlimited addresses. Quick subnetting tip: /24 means 256 addresses (2^(32-24)). (Source: IETF RFC 791 & RFC 8200)

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