Network and Node Security Flashcards
7 cards from real Blockchain Technology practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Network and Node Security flashcards as text
What does a partition attack attempt to do to a blockchain network?
Answer: Split the network into isolated groups
A partition attack divides the network so groups of nodes cannot communicate, enabling divergent chains or double-spends.
Why is using a VPN or private network for inter-node management traffic beneficial?
Answer: Keeps management traffic off the public internet
A VPN isolates sensitive management traffic from public exposure, reducing interception and attack risk.
What is a key defense against DDoS attacks targeting public-facing nodes?
Answer: Use of upstream DDoS mitigation and traffic scrubbing
Upstream DDoS protection absorbs and filters malicious traffic before it overwhelms the node.
Which logging practice supports incident response after a node breach?
Answer: Centralized, tamper-resistant log collection
Centralized, tamper-resistant logs preserve evidence and timelines needed to investigate a breach.
What risk does an outdated TLS configuration on a node's API present?
Answer: Susceptibility to interception via weak ciphers
Weak or outdated TLS ciphers can be broken or downgraded, exposing API traffic to interception.
Why should node operators implement least-privilege access for server accounts?
Answer: Limits damage if an account is compromised
Least-privilege ensures a compromised account can only do limited harm, containing the breach.
What is the benefit of geographically distributing redundant nodes?
Answer: Resilience against regional outages and routing attacks
Geographic distribution keeps the service available even if one region suffers an outage or routing attack.