Ppt uploaded by Mr.Balaji R.Ghule

1. Router
A Router is a device that connects two networks - frequently over
large distances.

2. • A router is a device that forwards data packets between
computer networks, creating an overlay internetwork.
• A router is connected to two or more data lines from
different networks. When a data packet comes in on one
of the lines, the router reads the address information in
the packet to determine its ultimate destination.
• A data packet is typically forwarded from one router to
another through the networks that constitute the
internetwork until it gets to its destination node.

4. Packets routed by routers to their destinations

5. There are two types of routers :
a) Static router :
Static router can manually set up & configure all routes. This
router uses the same route determined by a routing table .
Administrator is required to maintain the routing table & router
b) Dynamic router :
Dynamic router manually configures the first route . It detects
additional networks and routers automatically. Administrator is
required to maintain the router.

6.  Router limits the collision domain.
 Router can function on LAN & WAN
 Router can connects different media & architectures.
 Router can dtermine best path/route for data to reach the
destination.
 Router can filter the broadcasts.

7.  Router is more expensive than Hub, Bridge & Switch.
 Router only waork with routable protocol.
 Routing updates consume bandwidth.
 Increase latency due to greater degree of packet filtering.