What is DMZ is this really an appropriate name for the technology considering the function this type of subnet performs?

What is a hybrid firewall?

A hybrid firewall seems to combine abilities of other firewalls, such as packet filtering and proxy services.

6. What is a circuit gateway and how does it differ from the other forms of firewalls?

A circuit gateway is a type of firewall that operates at the transport layer. It is different from regulat firewalls in that it does not look at traffic flow between networks.

14. How do screened host architectures for firewalls differ from screened subnet firewall architectures? Which of these offers more security for the information assets that remain on the trusted network?

Screened-host firewall architecture allows only a single line of defense against possible attack. It allows a single host, the bastion host, to receive all incoming information, making it a key target for attack.With the screened-subnet firewall architecture is similar except that it has multiple bastion hosts and lies behind a packet filtering router. This raises the level of difficulty to penetrate defense and receive valuable hidden information.

How is static filtering different from dynamic filtering of packets? Which is perceived

Static Filtering requires a human to define the filtering settings beforehand. I relate this personally to configuring port forwarding on a local home network. It involves accessing the router configuration and defining specific ports to allow an application access through the firewall.

Dynamic Filtering is capable of changing filtering settings based upon certain network activities. This could be positive in a sense that it allows a network to allow certain applications port access simply by requesting it. A negative response might be if the network shuts down that access because it has detected excess in mal formed packets. My personal router has UPnP which stands for universal plug and play. This feature allows the router to automatically configuring port forwarding for programs that request access.

13. What key features point up the superiority of residential/SOHO firewall appliances over computer based firewall software.

The key features include but are not limited to, Restricting mac Filtering, allowing port forwarding, configuring ports to be on or off. configuration is easy because they are usually built into a network sharing switch.

7. What special function does a cache server perform? Why is this useful for larger organizations?

A cache server makes frequently used pages available. Larger companies use cache server to make sure pages that they use to market their products are ready to send instead of asking for a full request from a webpage host. It also adds an additional layer of protection against attacks.

1. What is the typical relationship among the untrusted network

The firewall helps in preventing certain types of information from movement between both trusted and untrusted network.

15. What is a sacrificial host? What is a bastion host?

A sacrificial host is a firewall that provides protection behind the organization's router. Another name for a sacrificial host is a bastion host. The bastion host is often a high priority target for hackers because of all the data that it protects and because it is only a single obstacle for the hacker to get around. A bastion host device is configured by being connected to a network and routing all traffic through it.

2. What is the relationship between a TCP and UDP packet? Will any specific transaction usually involve both types of packets?

TCP and UDP packets exist at the transport layer of the OSI model and are both protocols for transferring packets across a network. The primary difference between the two is that TCP contains error checking and has guaranteed delivery, while UDP does not. TCP is used when a complete communication is necessary, such as a chat message or file download. UDP is used mainly for live communication, such as an online video game or video streaming. Although TCP and UDP can use the same port numbers (for example, DNS uses both TCP port 53 and UDP port 53), the communication channels do not interact with each other.

3. How is an application layer firewall different from a packet-flitering firewall? Why is an application layer firewall sometimes called a proxy server?

An application layer firewall is frequently installed on a dedicated server separate from the filtering router, but commonly used with a filtering router. It is also refereed to as a proxy server because this firewall can be configured to run special software that acts as a proxy for a service request. A proxy server has increased exposure to risks from less trusted networks and limits the exposure of the Web server.

A packet filtering firewall examines header information of data packets that come into a network. It determines whether to deny or allow (drop of forward) a packet into the next network connection. Packet filtering firewalls examine every incoming packet header.

16. What is a DMZ? Is this really an appropriate name for the technology, considering the function this type of subnet performs?

A DMZ is known to work as type of middle ground between a trusted network and an un-trusted network or among two firewalls. It is an appropriate name for the technology because it provides an area whereby nobody is allowed to do anything unless tapped directly into the line

20. What is a VPN? Why is it becoming more widely used?

VPN stands for virtual private network. It is a private data network that maintains privacy through the public web by using a tunneling protocol and different security procedures. It is becoming very popular because it is a great way to extend your organizations internal network to a remote location securely. Another reason they are becoming more popular is because they are very cheap compared to a true private network.

17. What questions must be addressed when selecting a firewall for a specific organization?

What type of firewall technology offers the right balance between protection and cost for the needs of the organization?What features are included in the base price? What features are available at extra cost? Are all cost factors known?How easy is it to set up and configure the firewall? How accessible are the staff technicians who can competently configure the firewall?Can the candidate firewall adapt to the growing network in the target organization

19. What is a content filter? Where is it placed in the network to gain the best result for the organization?

A content filter is a software that helps to protect and prevent misuse or denial-of-service problems within an organization. This software allows administrators to restrict the access content that is on a particular network. Thanks to the system the content can be filter by location and protocols. This utility is extremely useful because companies can protect the information created internally to be exposure. Another way in which a company can benefit by having content filter is the restriction the program provides for users to connect with different sites that are not work related to work as this help employee to remain focus.

10. List the Five generations of firewall technology. Which generations are still in common use today?

The first generation of firewall technology consisted of static packet filtering firewalls. These blocked packets based on their headers. The second generation of firewall technology consisted of proxy servers. Proxy servers are dedicated systems that are separate from the filtering router and provide intermediate services for requestors. The third generation of firewall servers are stateful inspection firewalls which monitor network connections between internal and external systems using state tables. The fourth generation of firewalls consists of dynamic packets filtering firewalls. These allow only particulars packets with a particular source, destination, and port address to enter. The fifth generation of firewalls consists of the kernel proxy. This firewall evaluates packets at multiple layers of the protocol stack, by checking the security in the kernel as data is passed up and down the stack. All five of these generations are still used as they can all be implemented in various security architectures.

11. How does a commercial-grade firewall appliance differ from a commercial grade firewall system? Why is this difference significant?

Commercial-grade firewalls appliances are stand-alone units running on fully customized computing platforms that provide both the physical network connection and firmware programming necessary to perform their functions. They devices are combinations of computing hardware and software and have many of the features of a general-purpose computer with the addition of firmware-based instructions that increase their reliability and performance and minimize the likelihood of being compromised.

5. What is stateful inspection? How is state information maintained during a network connection or transaction?

Stateful Inspections keep track of each network connection between internal and external systems with the use of a State Table. State tables maintain state information and track the state and context of each packet in the conversation by recording which station sent what packet and when.

18. What is RADIUS? What advantage does it have over TACACS?

RADIUS is a Remote Authentication Dial-in User Service, it checks the authorizations of anyone accessing the system. RADIUS is also more widely accepted than TACACS+, this is because, if one uses both a firewall and an authentication server, the firewall starts to receive communication straight from the Internet; the firewall and authentication server will connect with one another over their own private network, making the assistances of TACACS+ not so beneficial.

What is the most widely accepted biometric authorization Technology Why do you think this technology is acceptable to users?

What is the purpose of a DMZ quizlet?

Where is a DMZ usually located?

In which of the following situations would you most likely implement a demilitarized zone DMZ )?