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Computer firewall is a security software which acts as a barrier and protects the system from black-hat intrusion attempts. Firewalls also block communication attempts into or out of your computer; certain types of malware or software bots that attempt to send or receive data messages will be blocked. A firewall program is your computers perimeter fence, designed to keep bad guys out, and to prevent data passing into/out of your computer. Firewalls are configured in software and hardware devices with specific criteria to block or prevent unauthorized access. It has the packet filtering mechanism which checks for the packets that contain data, prevents or blocks it depending upon the rules programmed in it. Reference source: personalfirewall.comodo.com
What else can I help you with?
What network device will prevent port scans?
A firewall
What type of network device can be configured as a perimeter firewall?
Router
What is a single host?
a firewall device with only one network interface
Which intermediary devices could be used to implement security between networks?
Security between networks is implemented in an intermediary device (a router or firewall appliance) at the perimeter of the network. The firewall function performed by this device permits only known, trusted data to access the network.
What is a single-homed bastion host?
a firewall device with only one network interface
What is a single homed bastion host?
a firewall device with only one network interface
Are self-contained hardware devices with firewall functionality that you can add a network?
Routers usually, if not always, include a firewall. This is the only device I know of.
A hardware device with software that is used to detect unauthorized activity on your network?
A Firewall can fit that description.
What is Difference between firewall and personal firewall?
A firewall is a security system—hardware, software, or both—that controls and filters network traffic between different networks, usually protecting an entire organization or network. A personal firewall is software installed on an individual device (like a PC or laptop) to monitor and control its incoming and outgoing traffic, protecting that single device rather than a whole network. In short: Firewall → Protects a network Personal firewall → Protects a single computer or device
Which devices work in the presentation layer?
firewall, router,layer 3 switches and i approve that answer ! NO! In general the firewall is a layer 4 device, it traffics filter incoming and outgoing ports. It uses the function of TCP and UCP. However a Firewall can also be a layer 3 device as in internal firewall in a router. Also a switch is a layer 2 device unless your talking about a Router switch.
What term describes a hardware device or software program that blocks unauthorized attempts to access your machine from the internet?
A peice of hardware of software that blocks internet or network traffic is called a Firewall.
What type of device is used to detect malicious network activity and report only those issues to the admin?
A firewall router
