Answer / toni

A Firewall is usually a networking device that protects
networks by blocking unwanted traffic, and monitoring and
controlling useful, desirable traffic. The Firewall
functions as a filter as traffic moves from one network to
another. It blocks or allows specific protocols and data
types, and inspects permitted traffic flow for networking
protocol compliance as well as adherence to a business's
information systems usage policy. This ensures that network
traffic acts in its intended function.

Routers and switches run Cisco IOS, and the IOS Firewall is
a feature that can be configured on them by software. This
feature allows routers and switches to work on a stateful
firewall basis.

Answer / sandeep.p

to help secure various network environments.
Cisco offers several integrated network firewall solutions

ASA 5500 Series: Controls network access at the WAN edge or
within the LAN
Cisco IOS Firewall: Helps control application traffic
Firewall Services Module (FWSM) for Catalyst 6500 Series

Switches and 7600 Series Routers: Allows a port to act as a
firewall and protect traffic within the LAN or at the
network perimeter

Embedded Firewall Services in the ASR 1000 Series Routers:
Adds firewall functions at the network perimeter to protect
network services
Web Application Firewall: Helps XML-based application
traffic securely reach its destination

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