Network Threats

What is the purpose of a firewall?

When using packet filtering with a firewall what is one way the firewall can choose to block a port?

• By analysing the packet number contained in the packet header if its not in order its blocked.

• By blocking all incoming traffic regardless of the port.
• By randomly selecting ports to block without any criteria.
• By analysing the protocol that has been used and matching it with a port number.

What is a proxy server

Why would a user, make use of a proxy server?

Match the malware with its purpose.

• Self-Replicating

• Adware

• Encrypts data to lock it.

• Spyware

• Installs a key logger

• Ransomware

• Spams adverts

• Worm

• Gives full remote access to a device.

• Rootkit

What is meant by phishing?

What is a buffer overflow?

Improving ​ (a)   , together with monitoring

attempts to gain ​ (b)   and protection

can significantly reduce threats from malware Measures include:

• Guarding against ​ (c)   attack

• Guarding against SQL injection attack

• Use of strong passwords for login credentials

• ​ (d)   authentication

• Use of ​ (e)   rights (file system permissions

• code quality
• unauthorised access
• buffer overflow
• Two-factor
• access
• denial
• code readability
• buffer stack
• three factor
• hackers

What is the purpose of the * command in SQL?

• To select all columns from a table.
• To update existing records in a table.
• To delete all records from a table.
• To select a specific column from a table.

What can help track or monitor network attacks?

• Firewall configurations
• Packet Sniffers

• Antivirus software
• Data encryption methods