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Static and dynamic routing (static routing (advantages (easy to configure…
Static and dynamic routing
Routing
Send IP packets across the network
forward decisions are based on destination IP address
Each router only knows the next step
The packet asks for directions every hop along the way
the list of directions is held in a routing table
static routing
administratively define the routes
toure in control
advantages
easy to configure and manage on smaller networks
no overhead from routign protocols (cpu, memory, bandwitdth)
easy to configure on sub networks(only one way out)
more secure - no routing protocols to analyze
Disadvantages
difficult to administer on larger networks
no automatic method to prevent routing loops
If there's a network change, you have to manually update the routes
no automatic rerouting if an outage occurs
Dynamic Routing
Routers sent routes to other routers
Routing tables are updated in (almost) real time
Advantages
no manual route calculations or management
new routes are populated automatically
very scalable
Disadvantages
Some router overhead required (cpu, memory, bandwidth)
Requires some initial configuration to work properly
Default route
A route no other route matches
the gateway of last resort
A remote site may have only one route
go that way -> rest of the world
can dramatically simplify the routing process
works in conjunction with all the other routing methods