Firewalls & VPN

The protocol data unit for the network layer is...

• data

• packet

• segment

• frame

A firewall is used to...

• detect the presence of known trojans

• prevent unauthorised access to a private network

• heal infections by known viruses

• encrypt connections

The image below shows an example of...

• ARP cache

• certificate authority

• firewall rules

• public key infrastructure (PKI)

Firewall rules can be based on...

• IP addresses

• ports

• domain names

• all of the above

All but one are types of firewall

• default

• application proxy gateway

• stateful inspection

• packet filtering gateway

Choose the best description for this picture.

• packet sniffing using Wireshark

• request/response interception using Zap

• secure communication over a VPN

• port scanning using Nmap

A tool commonly used to analyse packets at network level is...

• Wireshark

• OWASP Zap

• Nmap

• Burp Suite

The image below shows an example of...

• a .pcap file

• a CA database

• an OpenVPN configuration file

• an iptables configuration file