IP routing is a means of specifying and discovering paths in a TCP/IP network along which network
data may be sent. Routing uses a set of routing tables to direct the forwarding of network data packets
from their source to the destination, often via many intermediary network nodes known as routers.
There are two primary forms of IP routing: Static Routing and Dynamic Routing.
Static routing involves manually adding IP routes to the system's routing table, and this is usually
done by manipulating the routing table with the route command. Static routing enjoys many
advantages over dynamic routing, such as simplicity of implementation on smaller networks,
predictability (the routing table is always computed in advance, and thus the route is precisely the
same each time it is used), and low overhead on other routers and network links due to the lack of
a dynamic routing protocol. However, static routing does present some disadvantages as well. For
example, static routing is limited to small networks and does not scale well. Static routing also fails
completely to adapt to network outages and failures along the route due to the fixed nature of the
route.
Dynamic routing depends on large networks with multiple possible IP routes from a source to a
destination and makes use of special routing protocols, such as the Router Information Protocol
(RIP), which handle the automatic adjustments in routing tables that make dynamic routing possible.
Dynamic routing has several advantages over static routing, such as superior scalability and the ability
to adapt to failures and outages along network routes. Additionally, there is less manual configuration
of the routing tables, since routers learn from one another about their existence and available routes.
This trait also eliminates the possibility of introducing mistakes in the routing tables via human error.
Dynamic routing is not perfect, however, and presents disadvantages such as heightened complexity
and additional network overhead from router communications, which does not immediately benefit
the end users, but still consumes network bandwidth.
data may be sent. Routing uses a set of routing tables to direct the forwarding of network data packets
from their source to the destination, often via many intermediary network nodes known as routers.
There are two primary forms of IP routing: Static Routing and Dynamic Routing.
Static routing involves manually adding IP routes to the system's routing table, and this is usually
done by manipulating the routing table with the route command. Static routing enjoys many
advantages over dynamic routing, such as simplicity of implementation on smaller networks,
predictability (the routing table is always computed in advance, and thus the route is precisely the
same each time it is used), and low overhead on other routers and network links due to the lack of
a dynamic routing protocol. However, static routing does present some disadvantages as well. For
example, static routing is limited to small networks and does not scale well. Static routing also fails
completely to adapt to network outages and failures along the route due to the fixed nature of the
route.
Dynamic routing depends on large networks with multiple possible IP routes from a source to a
destination and makes use of special routing protocols, such as the Router Information Protocol
(RIP), which handle the automatic adjustments in routing tables that make dynamic routing possible.
Dynamic routing has several advantages over static routing, such as superior scalability and the ability
to adapt to failures and outages along network routes. Additionally, there is less manual configuration
of the routing tables, since routers learn from one another about their existence and available routes.
This trait also eliminates the possibility of introducing mistakes in the routing tables via human error.
Dynamic routing is not perfect, however, and presents disadvantages such as heightened complexity
and additional network overhead from router communications, which does not immediately benefit
the end users, but still consumes network bandwidth.
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