Splunk Enterprise Certified Architect Practice Test

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Which option can improve the reliability of syslog delivery to Splunk?

Use TCP syslog.
Configure UDP inputs on each Splunk indexer.
Use a network load balancer.
Use multiple syslog servers with a Universal Forwarder.

The correct answer is: Use TCP syslog.

Using TCP syslog enhances the reliability of syslog delivery to Splunk because it establishes a connection-oriented communication method. Unlike UDP, which is connectionless and does not guarantee message delivery, TCP ensures that packets are transmitted in order and without loss. If a packet is lost during transmission, TCP will retransmit it, ensuring that the data reaches the destination. This characteristic is crucial for syslog data, which may contain critical information for monitoring and auditing. The other options, while they offer their own benefits, do not directly address the reliability of data delivery as effectively as TCP. For example, configuring UDP inputs relies on a protocol that does not confirm receipt of data, making it less reliable. A network load balancer can optimize traffic distribution but does not inherently enhance the reliability of the connection itself. Similarly, using multiple syslog servers with a Universal Forwarder can improve redundancy but does not change the fundamental nature of the transmission protocol being used, making it less effective at ensuring message delivery compared to TCP syslog.