Identify When Connection/rate Limits Are Reached F5CAB2 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · medium

   When a rate limit is exceeded on an F5 BIG-IP virtual server, what is a common action taken by an iRule?

   • ALogging the traffic and allowing it
   • BRedirecting traffic to a different VLAN
   • CDropping the excess traffic
   • DIncreasing the rate limit automatically
   Reveal Solution Discussion Select an answer first
2. 12foundation · medium

   When a virtual server's connection limit is reached, what is the default behavior for new connection attempts?

   • AThey are rejected
   • BThey are queued
   • CThey are delayed
   • DThey are forwarded to the next virtual server
   Reveal Solution Discussion Select an answer first
4. 13expert · hard · select all that apply

   An administrator needs to identify when a virtual server reaches its connection limit. Which of the following methods can provide evidence of this event? (Select all that apply.)

   • AConfiguring an SNMP trap for the virtual server's connection count.
   • BChecking the BIG-IP system log for connection limit messages.
   • CReviewing the virtual server's statistics in the Configuration utility.
   • DReviewing the BIG-IP audit log for connection limit changes.
   Check answers Discussion Select an answer first
5. 14expert · hard

   An administrator configures an iRule to rate-limit requests per client IP to 100 requests per minute. The iRule uses a token bucket with a refill rate of 100 tokens per minute and a burst capacity of 20. A client sends 30 requests in the first 10 seconds. What is the expected behavior?

   • AThe first 20 requests are allowed, and the remaining 10 are rejected.
   • BAll 30 requests are allowed, but the client is throttled for the rest of the minute.
   • CThe first 10 requests are allowed, and the remaining 20 are rejected.
   • DAll 30 requests are allowed because the refill rate is 100 per minute.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   An administrator wants to rate-limit HTTP requests to a virtual server to prevent a single client from overwhelming the backend. The limit should be 5 requests per second per client IP. Which approach is most appropriate?

   • AUse an iRule with a sliding window counter per client IP.
   • BUse a SNAT pool with a rate limit.
   • CConfigure the virtual server's 'Rate Limit' setting to 5.
   • DSet the pool member's 'Rate Limit' to 5.
   Reveal Solution Discussion Select an answer first