What is the main purpose of a firewall on a network?
To filter packets between a trusted and an untrusted network
A network manager discovers a known malicious IP address is sending packets to the network. Which firewall feature should be used?
Blocking packets that are sent from that IP address
A software firewall is installed on a computer. What is a drawback of this compared with a dedicated hardware firewall?
It can slow down the computer it is installed on
Why do computer systems use usernames and passwords?
To prevent unauthorised people from using the system
Why do organisations give different members of staff different user access levels?
So each user can only open the files needed for their job
A password policy states that passwords must not be based on family names or dictionary words. Why is this?
These passwords are easier for attackers to guess
Which biometric method is more commonly used in high security environments?
Retinal scans
A data centre has a perimeter fence, security guards and an ID card entry system. Which risk do these measures mainly reduce?
Unauthorised people getting into the building
Which term describes hardware or software that separates a trusted network from an untrusted network and drops data that does not match its rules?
Firewall
What is meant by port blocking?
Stopping access to certain network ports by filtering the packets that use them
What is the name for the feature that checks where data travelling across a network has come from and where it is going, and drops anything that does not match a set of rules?
Packet filter
What is meant by access control?
Restricting who can use a system by using usernames, passwords and permissions
Which term describes the use of a person's physical characteristics, such as a fingerprint or a retinal scan, to verify their identity?
Biometric authentication
What is meant by physical security?
Protecting hardware, software and networks using physical methods such as locks and CCTV
A company wants to stop its staff from opening a list of unsuitable websites while they are at work. Which firewall feature makes this possible?
It can block traffic to certain websites
A network manager wants to stop staff using a program that connects to the network on one particular port. Which firewall feature should be used?
Port blocking
A company's password policy sets a minimum length and requires uppercase letters, lowercase letters and symbols in every password. Why does the policy do this?
It makes the password harder for an attacker to guess
A user unlocks a tablet simply by looking at it. Which method of access control is this?
Facial recognition
Which of these is an example of physical security?
Locks on doors and cabinets
A password policy requires staff to change their password every month. Why does this help to protect the network?
A discovered password can only be used for a short time
What happens to a packet that does not match a firewall's filtering rules?
It is dropped
A small company decides to use software firewalls instead of buying a dedicated hardware firewall. What is the most likely reason?
A dedicated hardware firewall is expensive to buy
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