Cisco Certified Support Technician (CCST) NetworkingNetworking FundamentalsMedium
A network architect is planning a highly resilient data center network. They want to ensure that if one network path fails, data can automatically reroute through an alternative path with minimal disruption. Which networking concept is fundamental to achieving this goal?
- ALoad Balancing
- BSingle Point of Failure
- CRedundancy
- DNetwork Address Translation (NAT)
Show answer & explanationAnswer & explanation
Correct answer: C. Redundancy
Redundancy is the fundamental concept of having duplicate network devices, links, or paths so that if one fails, the other can take over. This directly addresses the scenario's requirement for automatic rerouting and minimal disruption upon path failure, crucial for high availability in data centers.
Why the other options are wrong
- A. Load balancing distributes traffic across multiple paths to optimize performance, but its primary purpose isn't to provide backup upon failure, though it can be part of a redundant system.
- B. A single point of failure is something to be avoided in resilient networks, as its failure would bring down the system.
- D. NAT translates IP addresses, primarily to conserve public IPv4 addresses, and is unrelated to network path resilience.
Network Redundancy
Network redundancy is the practice of having duplicate or backup network devices, connections, or paths to ensure continuous network operation in the event of a component failure.
- Eliminates single points of failure.
- Improves network availability and fault tolerance.
- Achieved through redundant links, devices, power supplies, etc.
Memory trick: Redundancy Really Reduces Risks.