Firewalls

Question 1

What is a Firewall?

Answer 1

network security device or software that monitors and controls incoming and outgoing network traffic based on predetermined security rules

Question 2

What is a Screen Subnet (Dual-Homed Host)

Answer 2

acts as a protective barrier between external untrusted networks, and internal trusted networks.

Packet filtering firewall

Question 3

What is a Packet Filtering Firewall?

Answer 3

Checks packet headers for traffic allowance based on IP addresses and port numbers

Question 4

What is a Stateful Firewall?

Answer 4

Monitors all inbound and outbound network connections and requests

Question 5

What is a Proxy Firewall?

Answer 5

placed between an internal or external connection in a network, and it’s going to make connections on behalf of your other endpoints.

Question 6

What is a Circuit Level Proxy Firewall?

Answer 6

like a SOCKS firewall, is going to operate at the session layer or Layer 5 of the OSI model.

Question 7

What is a Application Level Proxy Firewall?

Answer 7

Conducts various proxy functions for each type of application at the layer 7 of the OSI model

Layer 7 Firewall

Question 8

What is the Kernel Proxy Firewall?

Answer 8

Fifth Generation Firewall

Has minimal impact on network performance while thoroughly inspecting packets across all layers

Question 9

What is the NGFW?

Answer 9

Next Generation Firewall

Merges standard firewall functions with advanced threat detection and application awareness

Single engine

Question 10

What is a UTM?

Answer 10

Uniform Threat Management Firewall

provides the ability to conduct numerous security functions from within a single device or network appliance

Separate individual engines

Question 11

What is a Web Application Firewall (WAF)?

Answer 11

focuses on the inspection of HTTP traffic.

Can be installed Inline or Out-of-band configuration

Question 12

What is inline configuration?

Answer 12

device is going to be placed between your network firewall and the web servers.

Question 13

What is Out-Of-Band Configuration?

Answer 13

Device receives a mirrored copy of web server traffic

Question 14

What is a Layer 4 Firewall?

Answer 14

Filters based on port numbers and protocols, without inspecting packet content

Question 15

What is a Layer 7 Firewall?

Answer 15

Inspects and controls traffic based on data content and application characteristics