Network Security Essentials Questions with
100% Correct Solutions
Denial-of-Service (DoS) attack - ANSWER An attack preventing authorized users from
accessing a network
Flooding - ANSWER Overwhelming the network with requests
Distributed Denial-of-Service (DDoS) - ANSWER A DoS attack launched from multiple
systems simultaneously
Network-based DDoS attack - ANSWER Exhausting a system's network bandwidth
Protocol-based DDoS attack - ANSWER Exhausting network resources or infrastructure
equipment
Application layer DDoS - ANSWER Exhausting specific functions of a program
Operational technology (OT) - ANSWER Hardware and software for monitoring and
controlling industrial equipment
DNS - ANSWER Hierarchical system for identifying network resources
DNS poisoning - ANSWER Redirecting users to a malicious website by modifying DNS
queries
DNS resolution - ANSWER Translating a domain name to an IP address
, DNS zone - ANSWER A portion of a DNS namespace managed by an administrator
Authoritative name server - ANSWER Manages a domain's configuration and DNS
records
Domain hijacking - ANSWER Changing domain registration info without owner's consent
DNSSEC - ANSWER Extensions providing cryptographic authentication of DNS data
Data origin authentication - ANSWER Assurance that DNS data originated from the zone
owner
Data integrity - ANSWER Assurance that DNS data has not been modified in transit
DNS cache poisoning - ANSWER Attack where DNS data is modified to redirect to
malicious sites
Data link layer - ANSWER Layer facilitating data transfer and error detection in OSI
model
Media Access Control (MAC) - ANSWER Unique 48-bit identifier for network devices at
the data link layer
Address Resolution Protocol (ARP) - ANSWER Protocol resolving internet addresses to
MAC addresses
ARP cache table - ANSWER Table mapping internet addresses to corresponding MAC
addresses
100% Correct Solutions
Denial-of-Service (DoS) attack - ANSWER An attack preventing authorized users from
accessing a network
Flooding - ANSWER Overwhelming the network with requests
Distributed Denial-of-Service (DDoS) - ANSWER A DoS attack launched from multiple
systems simultaneously
Network-based DDoS attack - ANSWER Exhausting a system's network bandwidth
Protocol-based DDoS attack - ANSWER Exhausting network resources or infrastructure
equipment
Application layer DDoS - ANSWER Exhausting specific functions of a program
Operational technology (OT) - ANSWER Hardware and software for monitoring and
controlling industrial equipment
DNS - ANSWER Hierarchical system for identifying network resources
DNS poisoning - ANSWER Redirecting users to a malicious website by modifying DNS
queries
DNS resolution - ANSWER Translating a domain name to an IP address
, DNS zone - ANSWER A portion of a DNS namespace managed by an administrator
Authoritative name server - ANSWER Manages a domain's configuration and DNS
records
Domain hijacking - ANSWER Changing domain registration info without owner's consent
DNSSEC - ANSWER Extensions providing cryptographic authentication of DNS data
Data origin authentication - ANSWER Assurance that DNS data originated from the zone
owner
Data integrity - ANSWER Assurance that DNS data has not been modified in transit
DNS cache poisoning - ANSWER Attack where DNS data is modified to redirect to
malicious sites
Data link layer - ANSWER Layer facilitating data transfer and error detection in OSI
model
Media Access Control (MAC) - ANSWER Unique 48-bit identifier for network devices at
the data link layer
Address Resolution Protocol (ARP) - ANSWER Protocol resolving internet addresses to
MAC addresses
ARP cache table - ANSWER Table mapping internet addresses to corresponding MAC
addresses
