WHAT IS ROUTER
A router is another network infrastructure device that directs packet through the network based on on information from network layer of OSI modal. A router uses a combination of
hardware and software to “rout” data from it source to its destination. A router can be configured to rout data packet from different. Network protocols,like TCP/IP ,IPX/SPX and apple talk.
Router segment large networks into logical segment called sub nets. The division of the network is based on the layer 3 addressing system, like IP addresses. If the network layer 3 data packet dose not across the router and
create a traffic congestion problem in another network. If data is addressing to a computeroutside the sub net.Thus routing of network data helps conserve network bandwidth. Thefollowing picture show cisco 2800 series router.
WHAT IS FIREWALL
Fire wall are use to protect a network data and resource from outside access and threats. A Firewall is used as a barrier between a internal network of an organization and network .
Since the primary function of a firewall is protect a network data and resource from outside threats , they are usually placed at the end point of a network.