Fundamentals of InfoSecadvanced
Select ALL statements that accurately describe denial-of-service conditions or attacks.
Answer
A target's network bandwidth can be exhausted, An application can be exhausted by attack traffic, A communication-link disruption can deny service, Hardware or software failure can make a service unavailable
Explanation
### Why this is right
- Bandwidth exhaustion can prevent legitimate traffic from reaching a target.
- An application can be overwhelmed even if the network link remains available.
- A disrupted communication link can make the service unreachable.
- Hardware or software failure can also make a service unavailable.
### The concept
Denial of service describes an availability impact, not one single technical mechanism. A distributed attack may consume bandwidth, while a SYN flood targets connection resources. Encryption protects data confidentiality in transit but does not remove the resource demands that occur before or during connection establishment.
### The other options
- **Encryption always prevents a SYN flood**: false; encryption does not stop connection-resource exhaustion.
### Terms
- **Denial of service**: preventing intended users from using a system or resource.
- **Distributed denial-of-service (DDoS)**: a denial-of-service attack that uses distributed sources.
### Remember
Service availability can fail through network, application, link, hardware, or software causes.
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