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Interpret The Component Of Routing Table

 

NETWORK ID

THIS IS THE DESTINATION SUBNET AND NETMASK. IT IS USED TO MATCH A DESTINATION IP ADDRESS TO THE NETWORK ID.

NEXT HOP

 THIS IS THE IP ADDRESS OF THE NEXT ROUTER THAT THE PACKET SHOULD BE FORWARDED TO.

ROUTING PROTOCOL

THIS IS THE ROUTING PROTOCOL THAT WAS USED TO LEARN THE ROUTE.

ADMINISTRATIVE DISTANCE

(AD) IS A VALUE ASSIGNED TO ROUTING PROTOCOLS TO INDICATE HOW RELIABLE THE ROUTING INFORMATION RECEIVED FROM THAT PROTOCOL IS. THE LOWER THE AD VALUE, THE MORE RELIABLE THE ROUTING PROTOCOL IS CONSIDERED TO BE.

METRIC

THIS IS A MEASURE OF THE COST OF THE ROUTE. LOWER METRICS ARE BETTER.

GATEWAY OF LAST RESORT

THIS IS THE IP ADDRESS OF THE ROUTER THAT SHOULD BE USED IF NO OTHER ROUTE MATCHES THE DESTINATION IP ADDRESS.

PREFIX

A PREFIX IS SIMPLY THE NETWORK ADDRESS IN A ROUTING TABLE AND THE PREFIX IS THE DESTINATION NETWORK ADDRESS. A PREFIX LENGTH IS JUST THE SHORT HAND WAY TO EXPRESS A SUBNET MASK USING CIDR NOTATION. IF THE SUBNET MASK IS 255 255.255.0 THEN THE PREFIX LENGTH IS /24.

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EXAMPLE OF ROUTING TABLE ENTRY :

Destination 10.0.0.0/24 Next Hop 192.168.1.1 Protocol RIP Administrative Distance 120 Metric 1

THIS ENTRY MEANS THAT THE ROUTER KNOWS HOW TO REACH THE SUBNET 10.0.0.0/24. THE NEXT HOP IS 192.168.1.1, WHICH IS THE IP ADDRESS OF THE ROUTER THAT THE PACKET SHOULD BE FORWARDED TO. 

THE ROUTING PROTOCOL USED TO LEARN THE ROUTE IS RIP, AND THE ADMINISTRATIVE DISTANCE IS 120. THE METRIC IS 1, WHICH MEANS THAT THIS IS THE BEST ROUTE TO THE SUBNET 10.0.0.0/24.

THE ROUTING TABLE IS A CRITICAL PART OF A ROUTER'S OPERATION. IT ALLOWS THE ROUTER TO DETERMINE HOW TO FORWARD PACKETS TO THEIR DESTINATIONS. 

THE COMPONENTS OF THE ROUTING TABLE ARE USED TO MAKE THESE DECISIONS.

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AD VALUES ROUTING PROTOCOL


METRICS MEANS NO.. OF HOPE


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ALL INFORMATION PROTOCOLS


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