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NEW QUESTION # 41
The monitoring team reports that the SNMP server is unable to poll data from a BIG-IP device.
What information will help the BIG-IP Administrator determine whether the issue originates from the BIG-IP system?
Answer: B
Explanation:
The exhibit shows a Self IP with:
VLAN: Data
Port Lockdown: Allow None
Impact of "Allow None" on SNMP
When a Self IP is configured with:
Port Lockdown: Allow None
the BIG-IP blocks all services and ports except a few hardcoded HA communication ports.
This means:
UDP/161 (SNMP) is blocked
UDP/162 (SNMP traps) is blocked
The SNMP server cannot poll or receive data from the BIG-IP through this Self IP SNMP relies on access through the Self IP if out-of-band (mgmt interface) is not used.
Thus, the issue is directly caused by Port Lockdown = Allow None, which prevents SNMP communication.
NEW QUESTION # 42
A BIG-IP Administrator plans to upgrade a BIG-IP device to the latest TMOS version.
Which two tools could the administrator leverage to verify known issues for the target versions? (Choose two.)
Answer: B,C
Explanation:
When performing a TMOS upgrade, F5 recommends validating the target software version to ensure that the release does not contain defects that may impact system behavior. The upgrade preparation process includes checking for known issues, validating compatibility, and reviewing advisory information for the intended version. Two primary F5 tools serve this purpose:
B). F5 iHealth
iHealth is a cloud-based diagnostic and analysis platform used to evaluate the operational state of a BIG-IP system.
Administrators upload a QKView file to iHealth to receive an automated assessment of the system. As part of upgrade planning, iHealth provides:
* Version-specific issue analysis , comparing the system's configuration and hardware against F5's internal catalog of published issues.
* Upgrade advisories , identifying potential risks such as deprecated features, module compatibility concerns, or changes in behavior between TMOS versions.
* Checks against known defects , allowing administrators to determine whether the target TMOS version contains issues relevant to their deployment.
This aligns with F5's recommended upgrade workflow, where iHealth is used before upgrading to confirm system readiness and detect software-level concerns.
D). F5 Bug Tracker
The Bug Tracker is F5's dedicated interface for reviewing software defects across TMOS releases.
It enables administrators to:
* Search for known bugs by TMOS version , module, severity, or defect ID.
* Review the status of defects (open, resolved, fixed in later releases).
* Identify whether high-impact or security-related issues are associated with the target upgrade version.
F5 documentation emphasizes reviewing known defects prior to installation of new software images, making the Bug Tracker a critical resource for upgrade validation.
Why the other options are not correct
A). F5 End User Diagnostics (EUD)
EUD is used exclusively for hardware diagnostics (ports, memory, fans). It does not provide software- related issue verification and is not used for upgrade planning.
C). F5 University
This is a training platform , not an operational tool. It does not provide defect listings or upgrade-specific warnings.
E). F5 Downloads
Although it provides access to software images and release notes, it is not a tool for identifying known bugs
. Release notes summarize general fixes and features, but systematic bug verification requires iHealth or the Bug Tracker.
NEW QUESTION # 43
The Configuration Utility of a BIG-IP device is currently accessible via its management IP10.53.1.245from all VLANs.
The BIG-IP Administrator needs to restrict access so only hosts from the10.0.0.0/24subnet can access the Configuration Utility.
Which TMSH command accomplishes this?
Answer: A
Explanation:
BIG-IP controls access to the web-based Configuration Utility (TMUI) through the/sys httpd allowlist. This parameter specifies which client IPs or subnets may initiate HTTP/HTTPS connections to the management interface.
To restrict TMUI access toonlythe 10.0.0.0/24 subnet:
* The correct method is tomodify the HTTPD allow listso that it contains only this subnet.
* This requires replacing the entire current list with the new subnet using:
modify /sys httpd allow replace-all-with {10.0.0.0/24}
This ensures thatonlyclients within 10.0.0.0/24 can reach the Configuration Utility.
Why the other options are incorrect:
* Options A and Ccreate network ACL objects under /net acl, which apply to data-plane traffic, not management-plane TMUI access. TMUI access is not controlled by LTM ACLs but by the HTTPD allow directive.
* Option Bis incorrect syntax and references /ltm httpd, which is not the proper object; the correct hierarchy is /sys httpd.
Thus, only modifying the/sys httpd allowlist achieves the required restriction.
NEW QUESTION # 44
An administrator is in the process of reactivating the license using the interface displayed in the exhibit.
What is the address of the license server to which the BIG-IP device must be able to establish an outbound connection in order to use the Automatic Activation Method ?
Answer: B
Explanation:
When you choose Automatic as the activation method in the License > Re-activate screen, the BIG-IP device itself contacts F5's license activation service over the Internet.
For successful automatic activation:
* The BIG-IP must have outbound network connectivity (typically via the management interface).
* DNS resolution and routing must allow it to reach the F5 license activation host (the one shown in option D).
* The device sends its dossier and registration key to that service and receives an updated license file in return, which is then installed automatically.
The other hostnames in the options are not used by BIG-IP for license activation, so they cannot be correct in the context of Automatic Activation .
NEW QUESTION # 45
An administrator is in the process of reactivating the license using the interface displayed in the exhibit.
What is the address of the license server to which the BIG-IP device must be able to establish an outbound connection in order to use the Automatic Activation Method?
Answer: B
Explanation:
When you choose Automatic as the activation method in the License > Re-activate screen, the BIG-IP device itself contacts F5's license activation service over the Internet.
For successful automatic activation:
The BIG-IP must have outbound network connectivity (typically via the management interface).
DNS resolution and routing must allow it to reach the F5 license activation host (the one shown in option D).
The device sends its dossier and registration key to that service and receives an updated license file in return, which is then installed automatically.
The other hostnames in the options are not used by BIG-IP for license activation, so they cannot be correct in the context of Automatic Activation.
NEW QUESTION # 46
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