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NEW QUESTION # 50
Which type of Virtual Server requires the use of a FastL4 profile?
Answer: D
Explanation:
Performance (Layer 4) virtual servers rely on FastL4 profiles to provide high-speed L4 processing without full proxy overhead.
Below is BATCH 2 (next 10 questions) extracted only from your uploaded document that are clearly related to BIG-IP Administration: Data Plane Configuration topics.
#As requested, I have strictly excluded questions related to:
* Licensing
* HA / Device Trust / Sync-only
* Logging destinations
* User roles
* Hardware, EUD, support processes
* System-only administration
Source: Your uploaded TMOS Administration v2.0 document
NEW QUESTION # 51
A Standard Virtual Server for a web application is configured with SNAT Automap. The original client IP must be known by backend servers.
What should the BIG-IP Administrator configure?
Answer: C
Explanation:
X-Forwarded-For inserts the original client IP into HTTP headers while SNAT is enabled.
NEW QUESTION # 52
An LTM device has a virtual server mapped to www.f5.com with a pool assigned. The objects are defined as follows: Virtual server: Destination 192.168.245.100:443 netmask 255.255.255.0. Persistence: Source address persistence netmask 255.0.0.0. SNAT: Automap. Profiles: HTTP/TCP. How should the BIG-IP Administrator modify the persistence profile so that each unique IP address creates a persistence record?
Answer: A
Explanation:
Source Address Affinity (Persistence) works by tracking the source IP address of incoming packets to ensure a client stays connected to the same backend server. The " netmask " setting within the persistence profile determines the " granularity " of this tracking. A netmask tells the BIG-IP how many bits of the source IP address to ignore when creating the persistence record. For example, the current setting of 255.0.0.0 (a /8 mask) means the BIG-IP only looks at the first octet of the IP; this results in all users from the same large Class A network (e.g., everyone from 10.0.0.0 to 10.255.255.255) being persisted to the exact same server, which can lead to severe load imbalance.
To ensure that each unique IP address creates its own individual persistence record, the administrator must set the netmask to 255.255.255.255 (for IPv4). This is a " host mask " or /32, which instructs the BIG-IP to evaluate all 32 bits of the client ' s source IP address. With this setting, 10.1.1.1 and 10.1.1.2 will be treated as distinct entities and can be load balanced to different servers, each maintaining their own " stickiness " .
While Option A (255.255.255.0) would group users by their local subnet, only the full 255.255.255.255 mask satisfies the requirement for true unique-IP persistence. This configuration is standard for internet-facing applications where users arrive from diverse locations and the administrator wants to maintain the most granular and balanced distribution of traffic possible.
NEW QUESTION # 53
A BIG-IP Administrator finds the following log entry after a report of user issues connecting to a virtual server:
01010201: Intercept exhaustion on 10.70.110.112 to 192.28.123.250:80 (proto 6) How should the BIG-IP Administrator modify the SNAT pool that is associated with the virtual server?
(Choose one answer)
Answer: B
Explanation:
The log message "Intercept exhaustion" indicates that the BIG-IP system has exhausted the available source port translations for one or more SNAT addresses. This occurs when too many concurrent client connections are being translated through a limited number of SNAT IP addresses, and all ephemeral source ports (typically ~64,000 per SNAT IP) are in use.
According to the BIG-IP Administration: Data Plane Configuration documentation:
Each SNAT IP address provides a finite number of available source ports.
When the number of concurrent connections exceeds the available port space, the BIG-IP logs an Intercept exhaustion error and new connections fail.
The recommended resolution is to increase the available SNAT resources by adding additional IP addresses to the SNAT pool.
Why the other options are incorrect:
A). Increase the timeout of the SNAT addressesIncreasing timeouts may actually worsen the problem by keeping ports allocated longer, accelerating port exhaustion.
B). Remove the SNAT pool and apply SNAT AutomapSNAT Automap uses the Self IP addresses on the egress VLAN, which may not provide additional capacity and can introduce routing or design issues. This is not a direct or recommended fix for SNAT exhaustion.
C). Remove an IP address from the SNAT poolThis would reduce the number of available source ports and further exacerbate the intercept exhaustion condition.
Correct Resolution:
By adding an IP address to the SNAT pool, the BIG-IP increases the total number of available source ports, alleviating intercept exhaustion and restoring successful client connections.
NEW QUESTION # 54
Refer to the exhibit.
A BIG-IP Administrator creates a new Virtual Server to load balance SSH traffic. Users are unable to log on to the servers.
What should the BIG-IP Administrator do to resolve the issue?
Answer: A
Explanation:
The virtual server is intended to process SSH traffic on TCP port 22 , but the exhibit shows that the standard
http HTTP profile is assigned. This is the configuration error. An HTTP profile enables BIG-IP Layer 7 HTTP processing and is appropriate only when the virtual server is expected to process HTTP protocol traffic.
F5 documentation defines its purpose directly: "An HTTP profile defines the way that you want the BIG- IP system to manage HTTP traffic." SSH is not HTTP. It is an independent application protocol transported over TCP , conventionally using port
22 . Therefore, an ordinary SSH load-balancing virtual server should retain the TCP protocol/profile while having HTTP Profile set to None . F5 ' s SSH virtual-server configuration guidance specifically uses service port 22 for SSH and does not require an HTTP profile.
Options B, C, and D do not address the fault. The destination address 10.1.1.2 correctly identifies the virtual server, while source 0.0.0.0/0 appropriately permits clients from any source. Changing the protocol to UDP would be incorrect because SSH requires TCP.
Reference Topics: Virtual Server configuration; HTTP profiles; TCP profiles; application-protocol profile assignment; SSH traffic handling.
NEW QUESTION # 55
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