Firewall is a network security system that monitors and controls incoming and outgoing network traffic based on a set of pre-established rules. Show
It protects an organization’s computers or network from unauthorized access to or from the Internet or a private network. It does this by filtering data packets transferred over networks and blocking access to certain ports according to specific security configurations or requirements pre-recorded by the network administrator. Where is the firewall located and what is its role?The firewall is usually located between the Internet and the internal network and it can be software or hardware. Its main function is to enforce access control between inbound-outbound traffic flows and between networks. It provides, in effect, a barrier between an internal network and another external network, such as the Internet, to prevent unauthorized access to or from the internal network. It also protects against malicious software (malware) that may attempt to enter the private network. What are the different types of firewalls?There are two types of firewalls: software firewall and hardware firewall. The software firewall is installed on a computer and consists of an operating system, a network interface card and a packet filter. It monitors the flow of information passing through the internal network of a computer. It listens for connections opened by remote computers and controls which connections are allowed to pass, based on rules defined by the administrator. It is commonly used to control access to sensitive computer systems from the Internet and other networks. This is because the software firewall uses packet filtering to block incoming packets that do not meet certain criteria, such as destination IP address or port number. It can also block outgoing packets based on the same criteria. Packet filtering is accomplished by examining the header information of each packet and comparing it to the settings set by the firewall administrator. The hardware firewall is a physical device. It can be either a device (an enclosure) or a device that is integrated into another device, such as a router or switch. It can be installed between two networks or at the point of interconnection of several networks. It is mainly used on large networks where software firewalls are not sufficient and would require too much processing power. It has two interfaces: one for incoming traffic and one for outgoing traffic. It filters incoming traffic and allows only authorized outgoing traffic to pass through to its destination. The filter is configured by an administrator to allow or deny specific protocol and port types, such as HTTP (web browsing), SMTP (email), DNS (name resolution), etc. What are the different categories of filtering (firewall)?There are several categories of firewall filtering. We can count among others:
Which firewall to choose?When choosing a software firewall, it is important to consider the type of connection you will be using. Other criteria should be taken into account to better guide the choice of your firewall. These criteria concern, for example:
What software acts as a barrier between your computer and a network or the internet?A firewall acts as a barrier or filter between your computer and another network such as the internet. You could think of a firewall as a traffic controller.
What can you use as a protective barrier on a network to keep out unauthorized traffic?A firewall is software or firmware that prevents unauthorized access to a network. It inspects incoming and outgoing traffic using a set of rules to identify and block threats.
Is a small file that records information about you such as the type of browser you are using your email address and your preferences for using a Web site?1st & 3rd Party Cookies
A cookie is a small file that a site leaves on your computer to keep a record of things such as your site preferences. So the next time you visit, it will already know things about you. Cookie technology is not a bad thing in itself.
Which of the following describes a firewall?Detailed Solution. The correct answer is Preventing unauthorized access. A firewall is a kind of security-conscious type of hardware or software that stays between the computer and our network with a primary task: preventing malicious software from reaching us.
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