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| Certification Vendor: | F5 Networks |
|---|---|
| Exam Name: | BIG-IP Administrator |
| Exam Number: | 101 |
| Available Languages: | Japanese, English |
| Exam Price: | USD $160 |
| Exam Duration: | 90 minutes |
| Related Certifications: | F5 Certified Solution Expert - LTM F5 Certified Solution Expert - Security |
| Certificate Validity Period: | 2 years |
| Passing Score: | 70% |
| Exam Format: | Scenario-based, Multiple Choice |
| Real Exam Qty: | 80 |
| Sample Questions: | F5 F5CAB5 Sample Questions |
| Exam Way: | Online proctored or at Pearson VUE testing center |
| Pre Condition: | F5 recommends completing F5 BIG-IP Administrator certification training or having equivalent hands-on experience with BIG-IP LTM |
| Official Syllabus URL: | https://support.f5.com/csp/education-certification |
The modern F5 world is changing its dynamics at a fast pace. To stay and compete in this challenging market, you have to learn and enhance your in-demand skills. Fortunately, with the BIG-IP Administration Support and Troubleshooting (F5CAB5) certification exam you can do this job nicely and quickly. To do this you just need to enroll in the F5CAB5 certification exam and put all your efforts to pass the BIG-IP Administration Support and Troubleshooting (F5CAB5) certification exam. After successful competition of the F5 F5CAB5 certification, the certified candidates can put their career on the right track and achieve their professional career objectives in a short time period.
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NEW QUESTION # 18
A Virtual Server uses an iRule to send traffic to pool members depending on the URI. The BIG-IP Administrator needs to modify the pool member in the iRule. Which event declaration does the BIG- IP Administrator need to change to accomplish this?
Answer: A
Explanation:
In F5 TMOS administration, the traffic flow is processed through specific event huddles within iRules. To troubleshoot or modify traffic based on a URI (Uniform Resource Identifier), the BIG-IP system must first parse the application-layer data. The HTTP_REQUEST event is triggered when the system has fully received and parsed the HTTP request headers from the client. This is the correct point to implement logic that selects a pool or pool member based on the path or file requested (e.g., /images or /api). Using CLIENT_ACCEPTED would be too early in the troubleshooting process because that event triggers at the L4 (TCP) connection establishment phase, before any URI information is available. Conversely, HTTP_RESPONSE occurs during the return traffic from the server, which is too late to make a load balancing decision. For troubleshooting virtual server behavior where URIs are involved, ensuring the iRule is attached to a Virtual Server with an HTTP profile and using the HTTP_REQUEST event is essential for proper traffic steering and inspection.
NEW QUESTION # 19
A gateway_icmp health monitor is configured on a pool. The BIG-IP Administrator is investigating why the pool is reported as down while the server is online. Other pools with servers in the same subnet are correctly monitored. What can cause this behavior? (Choose one answer)
Answer: C
Explanation:
A gateway_icmp monitor checks basic network reachability by sending ICMP echo requests (pings) to the pool member or its gateway. If the pool is marked DOWN while the server is confirmed to be online, the most likely cause is that ICMP traffic is being blocked.
Ahost-based firewall active on the server (Option C)can block ICMP echo requests or replies, preventing BIG-IP from receiving a successful response to the health check. This results in the monitor failing and the pool member being marked down, even though the server and application are otherwise functioning normally. This explanation is consistent with the scenario where other servers in the same subnet work correctly, indicating that routing and BIG-IP configuration are not the issue.
NEW QUESTION # 20
A BIG-IP Administrator creates a new Virtual Server. The end user is unable to access the page. During troubleshooting, the administrator learns that the connection between the BIG-IP system and server is NOT set up correctly. What should the administrator do to solve this issue?
Answer: C
Explanation:
When a virtual server is not working as expected despite the pool members being marked "UP" (Green), the issue is frequently a return-path routing failure. If the BIG-IP forwards a request with the original client's source IP address, the backend server will try to respond directly to that client. If the server does not have its default gateway pointed back to the BIG-IP, the response packet will be routed elsewhere (or dropped), resulting in a connection timeout for the user. To resolve this, the administrator must configure "Source Address Translation" (SNAT). By setting SNAT to "Automap" or a specific SNAT address, the BIG-IP replaces the client's IP with its own internal self-IP. The backend server then sees the BIG-IP as the source and sends the response back to it locally. This troubleshooting step ensures a functional, symmetric tr18affic flow. Identifying the need for SNAT is one of the most common troubleshooting tasks for new virtual server deployments where the BIG-IP is not the default gateway for the backend servers.
NEW QUESTION # 21
Refer to the exhibit. An LTM device has a virtual server mapped to www.f5.com . Users report that when they connect to www.f5.com they are unable to receive content. What is the likely cause of the issue? (Choose one answer)
Answer: D
Explanation:
Based on the configuration screens provided in the exhibit, the primary reason for the connectivity failure is the disabled ARP setting on the Virtual Address.
Virtual Address ARP Setting: In a standard BIG-IP deployment, the Address Resolution Protocol (ARP) must be enabled for the Virtual Address (192.168.238.111 in this case). When enabled, the BIG-IP system responds to ARP requests from the local network gateway or adjacent devices for that specific IP address.
Exhibit Analysis: Looking at the "Virtual Address List >> 192.168.238.111" properties section, the ARP checkbox is unselected (unchecked). Because ARP is disabled, the upstream router or client cannot resolve the MAC address for 192.168.238.111, and the traffic never reaches the BIG-IP LTM.
Availability Indicators: Note the yellow circle (status indicator) on both the Virtual Server and the Pool Members. In F5 BIG-IP, a yellow status typically indicates that the object is "Available" (Enabled) but its monitors are not currently identifying it as "Up" (which would be a green circle), or it is in a "Monitor Unknown" state. However, even if a pool is available, the traffic must first reach the Virtual Server, which is prevented here by the lack of ARP.
NEW QUESTION # 22
A BIG-IP device sends out the following SNMP trap: big-ipo.f5.com - bigipExternalLinkChange Link: 1.0 is DOWN. Where in the BIG-IP Configuration utility should the BIG-IP Administrator verify the current status of Link 1.0?
Answer: B
Explanation:
Identifying network-level performance issues often starts with investigating hardware-level alerts78. In F5 terminology, a "Link" like "1.0" or "1.1" refers to a physical interface on the appliance79. When an SNMP trap reports that a link is "DOWN," it indicates a loss of signal or an administrative shutdown of the physical port80. To verify this, the administrator must navigate to Network > Interfaces > Interface List81. This screen provides real-time status, showing whether the interface is "up," "down," or "uninitialized," as well as any media speed or duplex mismatches that could be causing performance degradation82. Troubleshooting this is the first step in resolving "pool member down" or "VLAN failsafe" issues, as a down interface will take down any VLANs associated with it, immediately halting all traffic flow for the services relying on that physical path.
NEW QUESTION # 23
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