GPPA Exam Dumps : GIAC Certified Perimeter Protection Analyst

The simplest form of a firewall is a packet filtering firewall. Typically, a router works as a packet-filtering firewall and has the capability to filter on some of the contents of packets.

On which of the following layers of the Open System Interconnection (OSI) reference model do these routers filter information?

Each correct answer represents a complete solution. (Choose all that apply.)

Which of the following can provide security against man-in-the-middle attack?

A firewall is a combination of hardware and software, used to provide security to a network. It is used to protect an internal network or intranet against unauthorized access from the Internet or other outside networks. It restricts inbound and outbound access and can analyze all traffic between an internal network and the Internet. Users can configure a firewall to pass or block packets from specific IP addresses and ports.

Which of the following tools works as a firewall for the Linux 2.4 kernel?