Routing ROUTING Routing Notes | EduRev

: Routing ROUTING Routing Notes | EduRev

 Page 1


Routing 
 
 
ROUTING 
Page 2


Routing 
 
 
ROUTING 
Router 
A router is a device that determines the next 
network point to which a packet should be 
forwarded toward its destination 
Allow different networks to communicate with each 
other 
A router creates and maintain a table of the 
available routes and their conditions and uses this 
information to determine the best route for a given 
packet. 
A packet will travel through a number of network 
points with routers before arriving at its destination. 
There can be multiple routes defined. The route with 
a lower weight/metric will be tried first. 
Routing 
Page 3


Routing 
 
 
ROUTING 
Router 
A router is a device that determines the next 
network point to which a packet should be 
forwarded toward its destination 
Allow different networks to communicate with each 
other 
A router creates and maintain a table of the 
available routes and their conditions and uses this 
information to determine the best route for a given 
packet. 
A packet will travel through a number of network 
points with routers before arriving at its destination. 
There can be multiple routes defined. The route with 
a lower weight/metric will be tried first. 
Routing 
Routing 
Routing 
Page 4


Routing 
 
 
ROUTING 
Router 
A router is a device that determines the next 
network point to which a packet should be 
forwarded toward its destination 
Allow different networks to communicate with each 
other 
A router creates and maintain a table of the 
available routes and their conditions and uses this 
information to determine the best route for a given 
packet. 
A packet will travel through a number of network 
points with routers before arriving at its destination. 
There can be multiple routes defined. The route with 
a lower weight/metric will be tried first. 
Routing 
Routing 
Routing 
Routing Protocols 
Static Routing 
Dynamic Routing 
IGP (Interior Gateway Protocol): Route data within an 
Autonomous System 
RIP (Routing Information Protocol) 
RIP-2 (RIP Version 2) 
OSPF (Open Shortest Path First) 
IGRP (Interior Gateway Routing Protocol) 
EIGRP (Enhanced Interior Gateway Routing Protocol) 
IS-IS 
EGP (Exterior Gateway Protocol): Route data between 
Autonomous Systems 
BGP (Border Gateway Protocol) 
Routing 
Page 5


Routing 
 
 
ROUTING 
Router 
A router is a device that determines the next 
network point to which a packet should be 
forwarded toward its destination 
Allow different networks to communicate with each 
other 
A router creates and maintain a table of the 
available routes and their conditions and uses this 
information to determine the best route for a given 
packet. 
A packet will travel through a number of network 
points with routers before arriving at its destination. 
There can be multiple routes defined. The route with 
a lower weight/metric will be tried first. 
Routing 
Routing 
Routing 
Routing Protocols 
Static Routing 
Dynamic Routing 
IGP (Interior Gateway Protocol): Route data within an 
Autonomous System 
RIP (Routing Information Protocol) 
RIP-2 (RIP Version 2) 
OSPF (Open Shortest Path First) 
IGRP (Interior Gateway Routing Protocol) 
EIGRP (Enhanced Interior Gateway Routing Protocol) 
IS-IS 
EGP (Exterior Gateway Protocol): Route data between 
Autonomous Systems 
BGP (Border Gateway Protocol) 
Routing 
Internetworking Devices 
 
Internetworking Devices 
Device  Description  
Hub Hubs are used to connect multiple users to a single physical device, 
which connects to the network. Hubs and concentrators act as 
repeaters by regenerating the signal as it passes through them. 
Bridge Bridges are used to logically separate network segments within the 
same network. They operate at the OSI data link layer (Layer 2) and 
are independent of higher-layer protocols. 
Switch Switches are similar to bridges but usually have more ports. 
Switches provide a unique network segment on each port, thereby 
separating collision domains. Today, network designers are replacing 
hubs in their wiring closets with switches to increase their network 
performance and bandwidth while protecting their existing wiring 
investments. 
Router Routers separate broadcast domains and are used to connect 
different networks. Routers direct network traffic based on the 
destination network layer address (Layer 3) rather than the 
workstation data link layer or MAC address. 
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