Application Control Engine (ACE) can check the health of servers and server farms by configuring health probes (which are sometimes referred to as keepalives). A probe can be one of many types. Which are valid ACE probes? (Choose three.)
A. HTTP
B. Java scripting
C. TCL scripting
D. RADIUS
E. TACACS
Correct Answer: ACD
Explanation/Reference:
Explanation:
You can instruct the ACE to check the health of servers and server farms by configuring health probes (sometimes referred to as keepalives). After you create a probe, you assign it to a real server or a server farm. A probe can be one of many types, including TCP, ICMP, Telnet, HTTP, and so on. You can also configure scripted probes using the TCL scripting language.
The ACE sends out probes periodically to determine the status of a server, verifies the server response, and checks for other network problems that may prevent a client from reaching a server. Based on the server response, the ACE can place the server in or out of service, and, based on the status of the servers in the server farm, can make reliable load-balancing decisions.
Reference: http://www.cisco.com/c/en/us/td/docs/app_ntwk_services/data_center_app_services/ace_appliances/vA4_2_0/configuration/slb/guide/slbgd/overview.html (health monitoring)
