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Different type of routing
Fields of routing table
Populate a routing table
Different types of routing
Direct and Indirect Routing
When routing is performed in the same network than
direct routing happens. Performed by Host.
– Destination network = local network
Indirect routing performed from one network to another
– Destination network ≠ local network
– Packet is forwarded to default gateway
Static and Dynamic Routing
Static routing :
Can be set as permanent (will not be removed
-If interface goes down)
- Only way for certain technologies
Dynamic routing :
Adapts to topology changes
Fields of Routing Table
Interface Flags Referenc
Mask: Used for entry
Network address : Defines where the packet will delivered.
Next-hop address : defines the address of the next router
Interface: Shows the name of interface
Flags: U(up)-The routing is up & running
G(gateway)-The destination is another network
H(hop-specific)-Host specific address
Reference count :Gives the number of router users at a moment
Use :shows the number of passed packets through router.
Packet Forwarding Techniques
Next Hop Method
Network Specific Method
Host Specific Method
Forwarding means to place the packet in its route to its destination.
Forwarding requires a host or a router to have a routing table.
Populate a Routing Table
A network router sends packets to remote network sites
based on information in its routing table.This table is like an
index that has an IP address, a MAC address and an
Populating a routing table from following figure
Routing table for Router R1
Mask Network Address Next Hop Interface
/26 18.104.22.168 ___ m2
/25 22.214.171.124 ___ m0
/24 126.96.36.199 ___ m3
/22 188.8.131.52 ___ m1
Any Any 184.108.40.206 m2
Jan. 30, 2019
Sep. 21, 2018
May. 30, 2017
May. 23, 2015
----Different types of routing
----Fields of routing table
---- Forwarding technique
----Populate a routing table