In the context of internet routing, redundancy means _.

A. If a single router on a network breaks, the entire network fails.
B. For any two points on the internet, there exists only one path between them.
C. Multiple paths exist between any two points.
D. Data sent over the internet is sent to the router with the lowest cost.

C. Multiple paths exist between any two points.

In the context of internet routing, redundancy means C. Multiple paths exist between any two points.

To determine the answer to this question, let's examine the given options:

A. If a single router on a network breaks, the entire network fails.
This option refers to a single point of failure, where the failure of a single router results in the failure of the entire network. However, redundancy is the opposite of a single point of failure, so this option does not represent redundancy.

B. For any two points on the internet, there exists only one path between them.
This option suggests that there is only one path between any two points on the internet. Redundancy implies having multiple paths, so this option does not represent redundancy either.

D. Data sent over the internet is sent to the router with the lowest cost.
This option refers to a routing criterion called "lowest cost," which typically considers factors such as link speeds or distances. While it relates to routing, it does not directly address redundancy.

Option C remains:

C. Multiple paths exist between any two points.
This option correctly describes redundancy in the context of internet routing. Redundancy means having multiple paths between any two points, allowing data to be rerouted in case of failures or congestion.

Therefore, the correct answer is C. Multiple paths exist between any two points.