Blockchain Network & Node Security

Question 1

Why is node authentication important in blockchain networks?

Accepted Answer

It protects against unauthorized nodes

Answer

Node authentication ensures that only legitimate participants can join and interact with the blockchain, reducing the risk of malicious attacks.

Question 2

Which type of attack targets the availability of blockchain networks by overwhelming them?

Accepted Answer

DDoS attack

Answer

A Distributed Denial of Service (DDoS) attack floods the network with excessive traffic, disrupting normal operations and blocking access.

Question 3

What is the function of transport layer encryption in blockchain communication?

Accepted Answer

Protects data transmission

Answer

Transport layer encryption secures data in transit between nodes, protecting it from interception and tampering.

Question 4

Which technique helps detect malicious activity within blockchain nodes?

Accepted Answer

Intrusion Detection System (IDS)

Answer

Intrusion Detection Systems (IDS) monitor traffic and behavior patterns to alert administrators of potential attacks or anomalies.

Question 5

How can blockchain nodes be hardened against physical and network attacks?

Accepted Answer

Implementing hardening techniques

Answer

Securing node configurations, using firewalls, and disabling unused ports can significantly reduce attack surfaces.

Blockchain Practice Test