Load balancing is the process of distributing network or application traffic across multiple servers to ensure no single server is overwhelmed. Round robin is a specific load balancing method where incoming requests are distributed sequentially across available servers in a cyclical manner.
Why the Other Options Are Incorrect:
B. Active-active:
This is a high-availability configuration where multiple servers or nodes are active simultaneously, but it focuses on redundancy and availability rather than explicitly on distributing traffic.
C. Active-passive:
This refers to a failover configuration where one server is active while the other is passive and only takes over in case of failure. This is not a load balancing technique.
D. Failover:
Failover is a method to switch to a backup system when the primary system fails. It ensures availability but does not distribute traffic among multiple servers.
They are asking for an example to LB. Active-active should be load balanced of course but it's not an example..it's basically a requirement while "round robin" is an example of multiple choices that are available
I agree with King2 (Answer B is it). Answer A (Round Robin) is an algorithm. While Answer B is the top solution. The algorithm is only able to work if the active-active cluster is there, which is the load balancing solution.
Active-active and Active-passive are configurations for high availability and redundancy rather than load balancing. They involve using multiple servers where all (active-active) or some (active-passive) are ready to take over in case of a failure but don't inherently distribute load for efficiency.
BALANCING
There are many scheduling types for load balancers. Three of them are round robin, most recently used, and weighted scheduling.
- Round robin
- Most recently used (MRU)
- Weighted scheduling
The Official CompTIA Server+ Study Guide (Exam SK0-005) page 244.
(cont.)
TYPES OF SERVER CLUSTERS
There are many server cluster variations. Common differences include the number of participating nodes, whether or not a node is active during normal operations, and how a cluster determines normal activities.
There are two configuration types for clusters: active-active and active-passive.
- Active-active clusters use a load balancer device to distribute server requests between the nodes. This design provides high availability and also increases performance. The load balancer distributes the workload among the cluster nodes.
- Active-passive clusters provide only high availability and not load balancing. All requests go to the active server. If that node fails, however, the requests go to the second server.
The Official CompTIA Server+ Study Guide (Exam SK0-005) page 241.
The question is asking about "load balancing" not "server cluster".
Round robin refers to a load balancer schedule, which assigns connections in order.
Weighted scheduling also refers to a load balancer schedule and is used when the server's hardware capabilities vary, allocating more connections to the more powerful servers.
Active-Active is correct - Round Robin is a scheduler
Active-active clusters use a load balancer device to distribute server requests
between the nodes. This design provides high availability and also increases
performance. The load balancer distributes the workload among the cluster nodes.
There are many scheduling types for load balancers. Three of them are round
robin, most recently used, and weighted scheduling
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