1.3.3 Network Security Flashcards
What is Malware?
Malcious software designed to steal from or damage a computer.
What is a virus?
Malware designed to self-replicate and spread.
What are 2 examples of Malware?
- Keyloggers
- Worms
- Adware
- Ransomware
What is phishing?
Stealing data by tricking users.
What are 3 examples of Network Defence?
- Training
- Antivirus
- User Access Levels
- Strong passwords
What is Holistic Antivirus?
Identifies malware based on predicting
behaviour.
What is signature based antivirus? (2 points)
Compares code to libraries of identified malicious behaviour.
Libraries have to be maintained.
What is a firewall?
Hardware or software that monitors packets
going to and from a network.
What is packet filtering?
Blocking packets based on rules.
State 3 reasons why to use a firewall.
- Prevent packets from accessing specific
devices. - Filter packets from a specific location or
service, e.g. Russia / e-mail. - Prevent outgoing packets with sensitive
information.
What is a Demilitarised Zone (DMZ)?
An area of protected devices between firewalls.
State 2 reason why you would use a DMZ.
- Offer some external services without
compromising LAN. - Additional layer of security of public services
compromised.
What is a Gateway?
A hardware device that connects two
dissimilar networks.
What is a Proxy?
A server that fetches packets on behalf of
another device.
State 2 reasons why you would use a proxy on outgoing traffic.
- Layer of security. Connects on your behalf.
- May store cached version.
- Lightens network load on server.
- Bypass region locks.
- Anonymity*
