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NEW QUESTION # 49
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 theAutomatic Activation Method?
Answer: D
Explanation:
When you chooseAutomaticas the activation method in the License Re-activate screen, the BIG-IP device itself contacts F5'slicense activation serviceover 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 theF5 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 ofAutomatic Activation.
NEW QUESTION # 50
The Port Lockdown feature prevents unwanted connection attempts to a Self IP. Which three types of connection attempts are unaffected by Port Lockdown settings?
Answer: C
Explanation:
Port Lockdown controls which ports and protocols a Self IP will respond to.
However, certain traffic types bypass Port Lockdown for BIG-IP functionality and routing integrity.
The three types that are NOT affected by Port Lockdown are:
1. Defined Virtual Server Traffic
Traffic destined to a Self IP that matches a configured virtual server is always accepted by the BIG-IP, regardless of Port Lockdown settings.
This ensures that traffic processing does not break when administrators restrict Self-IP ports.
2. ICMP (Internet Control Message Protocol)
ICMP (such as ping, traceroute responses, etc.) always passes through a Self IP even when Port Lockdown is set to:
Allow Default
Allow None
Allow Custom
F5 allows ICMP for reachability and diagnostic purposes independent of Port Lockdown rules.
3. Centralized Management Infrastructure (CMI)
CMI includes the internal HA services used for:
Device Trust
ConfigSync
Failover
Mirroring
These essential HA communications bypass Port Lockdown to prevent accidental cluster failure.
The well-known port for this traffic is TCP 4353, which is always permitted.
NEW QUESTION # 51
What are the two options for securing a BIG-IP's management interface?
(Choose two.)
Answer: A,D
Explanation:
Securing the BIG-IP management interface is a fundamental administrative responsibility. F5 best practices emphasize restricting who can reach the management port and ensuring that only authorized systems are allowed access.
A). Limiting management access to trusted network segments
F5 recommends placing the management interface on adedicated, isolated, and secured management network or VLAN, rather than exposing it to production or untrusted networks.
This reduces the attack surface by ensuring only trusted segments have visibility to administrative interfaces.
D). Restricting management access by IP or subnet
F5 BIG-IP uses the/sys httpd allowlist (for HTTPS) and configuration options insshd(for SSH) to control which IP addresses or subnets can access the device.
By specifying only known administrative IPs or ranges, unauthorized users cannot reach the login services.
Why the other options are incorrect
B). Blocking all management HTTPS/SSH ports
* This would prevent any administrative access and is not a viable security practice.
C). Using Self-IP addresses for administrative access
* F5 explicitly warns against using Self-IPs for management access unless strictly necessary.
* Self-IPs are exposed to the data plane and should not be used as the primary administrative interface.
NEW QUESTION # 52
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: A
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 # 53
The Service Check Date on the license matches the date that the BIG-IP was installed two years ago. Which of the following activities would require the BIG-IP Administrator to renew the license and update the Service Check Date for it to work?
Answer: B
Explanation:
The Service Check Date embedded in the BIG-IP license acts as a gating mechanism that determines eligibility for software updates. F5 enforces that the Service Check Date must be equal to or newer than the software release date of any BIG-IP version being installed. If the installed license carries a Service Check Date from two years ago, attempting to upgrade to a newly released BIG-IP software version -- whose release date post-dates that Service Check Date -- will fail, as the system validates this date during the upgrade process.
NEW QUESTION # 54
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