Identify When Connection/rate Limits Are Reached F5CAB2 Practice Questions (Page 4)

Questions 16–20

1. 16expert · hard

   An administrator configures an iRule to rate-limit requests per client IP to 10 requests per second using a sliding window. A client sends 10 requests at time 0.0s, then 5 requests at time 0.9s. What is the expected behavior for the 5 requests at 0.9s?

   • AAll 5 are allowed because the limit is per second, and the requests are in different seconds.
   • BOnly 3 are allowed, and 2 are rejected.
   • CAll 5 are allowed because the sliding window has reset.
   • DAll 5 are rejected because the total in the last second exceeds 10.
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   An administrator configures a rate limit on a virtual server using an iRule that allows 100 requests per second per client IP. The iRule uses a token bucket algorithm. A client sends 120 requests in one second. What is the expected behavior for the 20 excess requests?

   • AThey are all processed, but the client's IP is throttled for the next minute.
   • BThey are dropped or rejected according to the iRule's action.
   • CThey are queued and processed as tokens become available.
   • DThey are allowed, but the client's IP is added to a blacklist.
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   An administrator wants to be alerted when a virtual server reaches its connection limit. Which BIG-IP feature can be used to monitor this event?

   • ASNMP traps configured for the virtual server's connection statistics.
   • BThe BIG-IP audit log.
   • CThe BIG-IP Configuration utility's dashboard.
   • DThe BIG-IP system log.
   Reveal Solution Discussion Select an answer first
5. 19foundation · medium

   What happens to a new connection attempt when a pool member's connection limit is reached?

   • AThe connection is redirected to the management interface
   • BThe connection is sent to the same member anyway
   • CThe connection is rejected
   • DThe connection is queued until a slot frees up
   Reveal Solution Discussion Select an answer first
6. 20expert · hard

   A BIG-IP administrator is troubleshooting intermittent connection failures for a web application. The virtual server has a connection limit of 1000, and the pool members have a connection limit of 500 each. The pool has 3 members. The administrator notices that the virtual server's current connections are 900, but some clients are receiving connection refused errors. What is the most likely cause?

   • AThe SNAT pool is exhausted.
   • BThe virtual server's connection limit is being reached.
   • CThe virtual server's rate limit is being exceeded.
   • DOne or more pool members are reaching their connection limit.
   Reveal Solution Discussion Select an answer first