Network+ High Availability and Redundancy Concepts Quiz

1. A network uses HSRP or VRRP to provide redundancy at which OSI layer?

Layer 2 (Data Link)

Layer 3 (Network)

Layer 4 (Transport)

Layer 7 (Application)

2. A company implements DNS round-robin to distribute traffic. What is a limitation of this approach?

It cannot handle SSL/TLS encrypted traffic

It does not account for server health or load conditions

It requires synchronous replication

It only works with IPv6 addresses

3. Which redundancy approach requires the least infrastructure investment but offers the slowest recovery?

Hot standby

Warm standby

Cold standby

Active-active clustering

4. In the context of network redundancy, what does 'split-brain' refer to?

A condition where cluster nodes lose communication and operate independently

A security breach affecting multiple systems

Load balancer failure requiring manual intervention

Incomplete data synchronization between replicas

5. What is a primary benefit of using clustering in high availability architectures?

Reduced network bandwidth requirements

Automatic failover and load distribution across cluster nodes

Elimination of the need for backups

Simplified network management tasks

6. A network administrator configures multiple paths to the same destination. This is an example of:

Load balancing

Path redundancy

Session persistence

Traffic shaping

7. Which failover mechanism is typically the fastest but most expensive to implement?

Cold standby with manual recovery

Warm standby with periodic synchronization

Hot standby with real-time replication

Backup tapes stored off-site

8. Load balancers can operate at multiple layers. Which combination is valid?

Layer 4 and Layer 7 only

Layer 2 and Layer 5 only

Layer 4 (transport) and Layer 7 (application)

Layer 1 and Layer 3 only

9. In a disaster recovery plan, a geographically distributed backup site is primarily used to protect against:

Network congestion

Regional or site-wide disasters

User authentication failures

Malware infections only

10. Which statement about asynchronous replication is correct?

It guarantees zero data loss in all scenarios

It has lower latency but risks data loss if primary fails immediately

It requires all replicas to acknowledge before writing

It is slower than synchronous replication in all cases

11. Which of the following best describes high availability in network infrastructure?

The ability of a system to remain operational with minimal downtime

A network topology that uses only fiber optic cables

The practice of regularly backing up data to cloud storage

A security protocol that encrypts all network traffic

12. In network redundancy, what does RPO represent?

Recovery Priority Objective

Maximum acceptable data loss measured in time

Redundancy Protocol Optimization

Recovery Point Orchestration

13. Which load balancing algorithm distributes traffic based on server response time?

Round-robin

Least connections

Weighted least connections

IP hash

14. What is the primary disadvantage of synchronous replication in a redundant system?

It increases network latency due to acknowledgment requirements

It cannot be used with failover clusters

It requires fiber optic connections only

It eliminates the need for backups

15. A cold standby system is best suited for situations where:

Minimal RTO is critical for business operations

Cost reduction is more important than fast recovery

Real-time data synchronization is required

Zero downtime is guaranteed

16. Which of these is a characteristic of active-active redundancy?

Both systems operate simultaneously and share the load

One system is always idle waiting for failover

Manual intervention is required for switching

It requires synchronous replication only

17. In a redundant network design, what does MTTR stand for?

Maximum Time To Restore

Mean Time To Repair

Multi-Tier Traffic Routing

Monitored Transfer Time Rate

18. Load balancing distributes traffic across multiple servers to achieve which goal?

Improved security and encryption

Increased availability and better performance

Reduced hardware costs only

Elimination of network latency

19. Which redundancy method provides the fastest recovery time objective (RTO)?