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What are the three types of network security?

Answer:

Firewall - Makes it harder for somebody to get into the network
IDS - Makes it harder to mess about in the network when you are in
NAT - Makes it harder to map a network from the outside.

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First answer by Serialnumber1700. Last edit by Serialnumber1700. Contributor trust: 111 [recommend contributor recommended]. Question popularity: 4 [recommend question].