Redundancy in a network makes it more fault-tolerant. When two computers are connected by multiple routes, what effect does this have?

Redundancy in a network makes it more fault-tolerant. When two computers are connected by multiple routes, what effect does this have?

• A. It eliminates the need for DNS.
• B. It reduces network speed.
• C. It increases the number of devices required.
• D. It makes the network more fault-tolerant.

Answer: (D)

Having more than one route between two computers creates alternate paths for the data. If one path fails—due to a cable issue, a device outage, or heavy congestion—the traffic can automatically be sent along the other route, so communication stays up. That resilience is what fault tolerance is all about: staying operational even when part of the network encounters problems. DNS stays out of this picture; it translates domain names to IP addresses and doesn’t determine how many routes exist. There can be some overhead or added complexity from managing multiple paths, but the primary effect relevant here is the increased fault tolerance.

Having more than one route between two computers creates alternate paths for the data. If one path fails—due to a cable issue, a device outage, or heavy congestion—the traffic can automatically be sent along the other route, so communication stays up. That resilience is what fault tolerance is all about: staying operational even when part of the network encounters problems. DNS stays out of this picture; it translates domain names to IP addresses and doesn’t determine how many routes exist. There can be some overhead or added complexity from managing multiple paths, but the primary effect relevant here is the increased fault tolerance.