Packet-Filtering Gateways and Stateful Inspection Firewalls Quiz

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What type of firewall maintains state (context) information from one packet to another in the input stream?

Stateful Inspection Firewall (correct)

Guard

Application Proxy

Circuit-Level Gateway

What does a circuit-level gateway firewall essentially allow one network to be?

An intrusion into another network

A separate entity from another network

An extension of another network (correct)

A mirror of another network

What type of firewall runs on a workstation or server and can enforce security policy like other firewalls?

Intrusion Detection Systems (IDS)

Personal Firewall (correct)

Application Proxy

Stateful Inspection Firewall

What does Network Address Translation (NAT) do?

Conceals real internal addresses (D) Signup and view all the answers

Which type of firewall can interpret data at the protocol level and respond, implementing a programmable set of rules?

Guard (A) Signup and view all the answers

What is a common misconception about firewalls?

Firewalls exercise significant control over the content admitted to the inside (D) Signup and view all the answers

What is the main purpose of an Intrusion Detection System (IDS)?

To complement preventative controls by monitoring for malicious or suspicious events (D) Signup and view all the answers

Which type of IDS detects attacks in different parts of the network and can be either passive or active?

Network-based IDS (NIDS) (C) Signup and view all the answers

What is the main function of Security Information and Event Management (SIEM)?

To monitor and analyze log data from various network components and systems (D) Signup and view all the answers

How can network encryption be achieved according to the given text?

By using VPNs, SSH, and SSL/TLS protocols for end-to-end encryption only (C) Signup and view all the answers

What is the purpose of SSL (Secure Sockets Layer)?

Server and client authentication, and encrypted communication (B) Signup and view all the answers

What is the purpose of a VPN (Virtual Private Network)?

To protect communication between two sites over public networks (A) Signup and view all the answers

What is the main purpose of onion routing?

To evade authorities and communicate freely (B) Signup and view all the answers

What is the function of an intrusion detection or protection system?

To monitor network traffic and counter specific malicious network threats (D) Signup and view all the answers

What type of firewalls run as dedicated devices?

Stateful inspection firewalls (A) Signup and view all the answers

What does SSL stand for?

Secure Sockets Layer (B) Signup and view all the answers

What does TLS (Transport Layer Security) provide?

Server and client authentication, and encrypted communication (A) Signup and view all the answers

What is a key characteristic of a firewall as a reference monitor?

Always invoked (cannot be circumvented) (B) Signup and view all the answers

What does onion routing prevent an eavesdropper from learning in a network?

The source and destination of the data in transit (C) Signup and view all the answers

Which type of firewalls controls access based on packet address and specific transport protocol type?

Packet-Filtering Gateways (C) Signup and view all the answers

What feature of Secure Shell (SSH) protects against spoofing attacks and modification of data in communication?

Authenticated, encrypted path to the OS command line over the network (B) Signup and view all the answers

What does a virtual private network (VPN) provide for communication between two sites over public networks?

A secure connection for communication between two sites over public networks (A) Signup and view all the answers