8 Network Security Basics Free Online FlashCards

What does network security protect against?

Network security protects networked devices, communications, and information from unauthorized access, alteration, disruption, or destruction.

What does confidentiality mean in network security?

Confidentiality means information is accessible only to authorized people or systems. Encryption and access controls help protect it.

How are a threat and a vulnerability different?

A threat may exploit a vulnerability to cause harm. For example, an attacker could take advantage of an unpatched server.

What does a firewall do, and what is one limitation?

A firewall applies rules to allow or block network connections. It cannot prevent every attack, especially through allowed connections or against vulnerable devices.

What does encryption do to data?

Encryption transforms readable data into a form that cannot ordinarily be understood without the appropriate key.

Where is multifactor authentication especially useful?

Multifactor authentication (MFA) adds an authentication safeguard; it is especially useful for remote and privileged accounts.

What does integrity mean in the CIA triad?

Integrity means information and communications remain accurate and are not changed without authorization.

What does availability mean in network security?

Availability means systems and data remain usable when needed. Redundancy, backups, and defenses against service disruption support it.

What is the principle of least privilege?

Least privilege gives each user or service only the access needed to perform its task.

What is defense in depth?

Defense in depth uses multiple safeguards so that one failed control does not leave a system unprotected.

What is the purpose of a denial-of-service attack?

A denial-of-service attack overwhelms a service or network with traffic, making it difficult for legitimate users to connect.

What does encryption in transit protect?

Encryption in transit protects data as it travels across a network; TLS can help secure a browser-to-website connection.