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Worksheetscryptography
Total questions: 25
Worksheet time: 13mins
What does the term "key exchange" mean in cryptography?
Sharing of encrypted data
Sharing of cryptographic keys between parties
Swapping public keys for private keys
Changing encryption algorithms during communication
Which of the following ensures confidentiality of a message?
Hashing
Encryption
Digital signatures
Salting
In symmetric encryption, the same key is used for:
Encryption only
Decryption only
Both encryption and decryption
Key generation
What is the purpose of a message authentication code (MAC)?
Encrypt data
Authenticate the sender and verify integrity
Create digital certificates
Generate random keys
What is a primary characteristic of a one-way hash function?
It can be reversed to obtain the original data
It produces fixed-length output for variable-length input
It uses symmetric keys
It requires high computational power
Which of the following is NOT a characteristic of public-key cryptography?
Scalability
Secure key distribution
High speed
Asymmetry
Which of the following is a weakness of symmetric key cryptography?
Key distribution
Complexity of the algorithm
Low speed
High storage requirements
Which security principle ensures that data is not altered during transmission?
Confidentiality
Integrity
Availability
Anonymity
. What is the primary purpose of two-factor authentication?
To encrypt data
To provide an additional layer of security
To prevent phishing attacks
To generate digital signatures
What is the primary goal of network security?
To ensure that only authorized users have access to the network
To optimize the speed of data transfer
To develop new network protocols
To prevent all types of network traffic
A network firewall is primarily designed to:
Monitor and block incoming and outgoing traffic
Encrypt network traffic
Authenticate users for remote access
Manage IP address assignments
Which of the following is an example of a vulnerability in a network?
A weak password
An authenticated user
An encrypted communication channel
A functioning firewall
Which of the following is a type of firewall that filters traffic based on application-level data?
Packet-filtering firewall
Circuit-level firewall
Stateful inspection firewall
Application firewall
What is the purpose of the "Least Privilege" principle in information security?
To allow maximum user access to the system
To restrict user access to only the necessary resources
To ensure system performance optimization
To encrypt all data in the system
Which of the following is a common threat to network security?
Malware
Strong passwords
Backup systems
Encryption
In the context of network security, which of the following defines a "threat"?
A weakness that can be exploited by a hacker
Any potential danger that could compromise data or resources
A tool used to monitor network traffic
A procedure for recovering lost data
What is an LDAP server primarily used for?
Managing email traffic
Providing access control and directory services
Filtering web traffic
Encrypting data
Which of the following does a firewall typically use to decide whether to allow or block traffic?
IP address only
IP address and protocol
URL length
Time of day
A "stateful inspection firewall" monitors:
The contents of data packets only
Only the source and destination IP addresses
The entire session state of network connections
Just the network traffic at the application layer
Which of the following is an example of an Information Security breach?
A user fails to update their software
A hacker gains unauthorized access to sensitive data
A user installs antivirus software
A system runs a scheduled backup
Which of the following types of firewalls operates at the application layer?
Circuit-level gateway
Stateful inspection firewall
Proxy firewall
Packet-filtering firewall
An attacker exploiting a vulnerability in an unpatched system is an example of which type of threat?
Insider threat
Physical threat
Exploit-based threat
Data loss threat
. What type of firewall is commonly used in high-security environments to separate internal and external networks?
Packet-filtering firewall
Proxy firewall
Dual-homed firewall
Stateful inspection firewall
Which of the following is a common security measure used in network security?
Regularly updating security patches
Disabling firewalls to improve performance
Sharing passwords among employees
Removing antivirus software
Which of the following best describes a "denial-of-service" (DoS) attack?
A method of gaining unauthorized access to a system
A type of attack that makes a network service unavailable to users
An attack that alters data integrity
An attack that intercepts network traffic
