R1 and R2 redundancy

Published at dimensions 1221 × 412 in Redundancy Terms: S1, S2, R1, R2.
R1 redundancy on the left is functionally equivalent to S2 redundancy, without the single point of failure in the NAP. R2 redundancy adds yet another level of assurance and high availability.

R1 redundancy on the left is functionally equivalent to S2 redundancy, without the single point of failure in the NAP. R2 redundancy adds yet another level of assurance and high availability.