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Calling all masterminds!
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1
In NAT, what is the main purpose?
a
To resolve domain names into IP addresses.
b
To automatically assign IP addresses to devices on a network.
c
To allow multiple devices on a private network to share a single public IP address.
d
To filter network traffic based on security rules.
2
What is the primary purpose of an IP address?
a
To determine the connection speed of the network.
b
To define the physical hardware address of a network interface card.
c
To uniquely identify a host on a network and specify its location.
d
To identify a specific application or service running on a host.
3
What can IPv6 be described as?
a
A 16-bit number used to identify services on a host.
b
A 128-bit address protocol using hexadecimal.
c
A 32-bit address protocol using dotted-decimal notation.
d
A 48-bit address used for physical hardware identification.
4
Which is used to define the network portion of an IP address?
a
Subnet mask
b
DNS server
c
Default gateway
d
MAC address
5
Approximately how many IP addresses are available in IPv4?
a
340 undecillion
b
16.7 million
c
4.3 billion
d
65,536
6
If an organization has 192.168.64.0/22, how many devices can connect?
a
510
b
254
c
1022
d
1024
7
Which octets represent the network in 192.168.4.0/24?
a
Only the first octet (192)
b
Only the first two octets (192.168)
c
Only the last octet (0)
d
The first three octets (192.168.4)
8
What is the primary purpose of the Domain Name System (DNS)?
a
To automatically assign IP addresses to devices on a network.
b
To encrypt communication between a web browser and a web server.
c
To filter network traffic and block malicious websites.
d
To translate human-readable domain names into machine-readable IP addresses.
9
Which field contains the same data for both /etc/passwd and /etc/shadow records?
a
The default shell
b
The User ID (UID)
c
The password field
d
The username
10
Which utilities identify network services on a system?
a
grep and find
b
ping and traceroute
c
nmap and netstat
d
ifconfig and ipconfig
11
Approximately how many possible IP addresses are, in theory at least, available through IPv4?
a
16.7 million
b
65,536
c
340 undecillion
d
4.3 billion
12
If your organisation is assigned the IP block 192.168.64.0/22, how many devices can connect to this subnet?
a
510
b
254
c
1022
d
1024
13
Which of the following octets represent the network for 192.168.4.0/24?
a
Only the last octet (0)
b
Only the first two octets (192.168)
c
Only the first octet (192)
d
The first three octets (192.168.4)
14
What is the primary purpose of the Domain Name System (DNS)?
a
To encrypt communication between a web browser and a web server.
b
To filter network traffic and block malicious websites.
c
To translate human-readable domain names into machine-readable IP addresses.
d
To automatically assign IP addresses to devices on a network.
15
What information does a typical security audit of your network look for?
a
Vulnerabilities, misconfigurations, and non-compliance with security policies.
b
The monthly cost of the company's internet service plan.
c
The models of all network hardware.
d
A log of every website visited by every employee.
16
What are attack methods aimed specifically at network protocols?
a
Ransomware, keyloggers, and spyware.
b
Phishing, SQL Injection, and Cross-Site Scripting (XSS).
c
Social engineering and physical theft of hardware.
d
IP spoofing, TCP SYN floods, and DNS cache poisoning.
17
What is the greatest potential weakness of asymmetric encryption in relation to its alternatives?
a
It cannot be used to verify the identity of the sender.
b
It is significantly slower and requires more computational resources.
c
It requires both parties to share a secret key in advance.
d
It is considered less secure than symmetric encryption.
18
Which best describes hashing?
a
A system for translating domain names into IP addresses.
b
A one-way function that transforms any input into a fixed-length string.
c
A two-way process that scrambles data using a secret key.
d
Reversible process used to make data smaller for storage.
19
What are common uses for which blockchains can be particularly effective?
a
Running complex artificial intelligence models in real-time.
b
Managing decentralized cryptocurrencies and ensuring supply chain transparency.
c
Hosting dynamic websites and streaming high-definition video.
d
Editing documents simultaneously in a real-time collaborative tool.
20
What best describes the “chain” in blockchain?
a
The sequence of user accounts that are linked together on the network.
b
A series of sequential transactions that are grouped within a single block.
c
A physical connection of servers that hold the distributed ledger.
d
Each block is cryptographically linked to the previous one using a hash.
21
Which utilities allow you to scan a system and see what network services?
a
grep and find
b
ifconfig and ipconfig
c
ping and traceroute
d
nmap and netstat
22
What command will determine how many records in Problem.txt contain the word error?
a
find "error" Problem.txt
b
count "error" Problem.txt
c
grep -c "error" Problem.txt
d
wc -l Problem.txt
23
List 3 shell programs.
a
bash, zsh, and ksh
b
vim, nano, and emacs
c
grep, awk, and sed
d
ssh, ftp, and telnet
24
The system admin compressed a file to .gz. Which utility was used?
a
bzip2
b
tar
c
zip
d
gzip
25
Before the umask is applied, a directory has a default permission code of which?
26
Which folder contains the time zone template files in Linux?
a
/dev/time/
b
/etc/
c
/usr/share/zoneinfo
d
/var/log/
27
Which field contains the same data for both a /etc/passwd and /etc/shadow record?
a
The username
b
The default shell
c
The User ID (UID)
d
The password field
28
You are a CentOS admin. Which grep command is best to find May 30 and a specific IP in /var/log/messages?
a
grep "^May 30.*192\.168\.10\.42$" /var/log/messages
b
grep May 30.*192\.168\.10\.42 /var/log/messages
c
grep May 30" /var/log/messages | grep 192.168.10.42
d
grep -E "^May 30 | 192.168.10.42$" /var/log/messages
29
Which Bash command best describes iterating through data until complete?
a
until
b
while
c
if
d
for
30
When will the cron entry 0 0 1 * * myscript run?
a
At midnight (00:00) on the first day of every month.
b
On January 1st at midnight only.
c
Every minute on the first day of the month.
d
Every day at 1:00 AM.
31
What does CI/CD stand for in the context of DevOps?
a
Compute, Iterate / Code, Debug
b
Continuous Integration / Continuous Delivery (or Deployment)
c
Continuous Implementation / Continuous Design
d
Code Integration / Code Deployment
32
Which network layer uses the WPA encryption?
a
Physical Layer (Layer 1)
b
Data Link Layer (Layer 2)
c
Network Layer (Layer 3)
d
Application Layer (Layer 7)
33
Which two commands set IP, subnet, and gateway on an interface?
a
netstat and nmap
b
ifconfig and netsh
c
ipconfig and ping
d
ifconfig and ipconfig
34
Give 3 samples of data types in a typical Wireshark output?
a
Username, Password, and File Name
b
Firewall Rule, Antivirus Status, and User Login Time
c
Source IP Address, Protocol, and Destination Port
d
CPU Usage, Memory Allocation, and Disk I/O
35
What tool enables automated scripted scans beyond the GUI (Wireshark)?
a
wireshark
b
tshark
c
nmap
d
Metasploit
36
What tool allows you to send ICMP messages to test connectivity?
a
ssh
b
ping
c
netstat
d
ftp
37
How do you initialise a new Git repository?
a
git init
b
git clone /path/to/repo
c
git start
d
git create new
38
What command commits changes with a message?
a
git add -m "my message"
b
git commit -a
c
git commit -m "my message"
d
git message -m "my message"
39
What is the meaning of git pull?
a
It downloads changes without integrating them.
b
It lists all remote branches available to pull.
c
It downloads changes from a remote repository and immediately integrates them into your current branch.
d
It uploads your local changes to the remote repository.
40
What is NAT primarily used for?
a
Assign unique public IPs to every device
b
Allow multiple devices on a private network to share a single public IP
c
Filter traffic based on security rules
d
Resolve domain names into IP addresses
41
What is the primary purpose of an IP address?
a
Define the hardware address of a NIC
b
Encrypt data between client and server
c
Identify a host on a network and specify its location
d
Route traffic without a gateway
a
Block malicious websites automatically
b
Translate domain names into machine-readable IP addresses
c
Identify the physical network topology
d
Encrypt network traffic
a
A technique to speed up data transfer
b
A social engineering attack using deceptive messages to steal data
c
A method to securely store passwords
d
A type of firewall configuration
44
What motivates many DDoS attacks?
a
To verify user identities securely
b
Hacktivism, extortion, or creating a distraction for another attack
c
To update software licenses
d
To improve network speed for everyone
45
Which data is most at risk on public Wi‑Fi with rogue sniffers?
a
Data transmitted in plaintext over unsecured networks
b
Data never transmitted over the air
c
Data in encrypted VPN tunnels only
d
Data stored on a powered-off hard drive
46
Which describes hashing?
a
A reversible encryption process
b
A double-checksum that can be decrypted
c
A method to compress data losslessly
d
A one-way function that outputs a fixed-length string
47
How do OSINT breaches differ from phishing?
a
Both are identical in technique
b
OSINT uses public data; phishing deceives users for data
c
OSINT is always illegal; phishing is legal
d
Phishing uses only public data; OSINT uses private data
48
What best describes hashing vs encryption?
a
Both are always easily reversible
b
Hashing is one-way; encryption is reversible with a key
c
Hashing is reversible with a key; encryption is one-way
d
Hashing encrypts data; encryption stores passwords
49
What is phishing backdoor vulnerability?
a
An OS patch that closes a port
b
A VPN missetup
c
A scenario where phishing is used to install a backdoor
d
A firewall misconfiguration
50
Select which image is made by AI. (You can click on the picture to zoom out)
Choose one or more answers
a
b
51
Select which image is made by AI. (You can click on the picture to zoom out)
52
Select which image is made by AI. (You can click on the picture to zoom out)
53
Select which image is made by AI. (You can click on the picture to zoom out)
54
Select which image is made by AI. (You can click on the picture to zoom out)
55
Select which image is made by AI. (You can click on the picture to zoom out)
Choose one or more answers
a
b
56
Select which image is made by AI. (You can click on the picture to zoom out)
57
Select which image is made by AI. (You can click on the picture to zoom out)
58
Select which image is made by AI. (You can click on the picture to zoom out)
59
Select which image is made by AI. (You can click on the picture to zoom out)
60
How is hashing different from encryption?
a
Hashing is a one-way operation; encryption can be decrypted.
b
Hashing is two-way; encryption is one-way.
c
Both are easily decrypted.
d
Neither is related to security.
61
Which organization in Vietnam is the governing state management agency for information security
a
National Cyber Security Monitoring Center (NCSC
b
Ministry of Public Security
c
Government Cipher Committee
d
Authority of Information Security (AIS)
62
What are the measures to protect accounts when using public Internet?
a
Use a VPN, and two-factor authentication (2FA)
b
Enter the password one time.
c
Change the password frequently.
d
Use for a short period of time.
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