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| Section | Objectives |
|---|---|
| Load Balancing and Traffic Management | - Load balancing methods
|
| BIG-IP System Architecture | - BIG-IP system components
|
| Traffic Policies and iRules | - Policy-based traffic control
|
| NAT and Address Translation | - SNAT and NAT concepts
|
| Application Delivery Concepts | - SSL offloading concepts
|
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질문 # 57
Which two statements describe differences between the active and standby systems? (Choose two.)
정답:A,D
질문 # 58
The BIG-IP Administrator wants to provide quick failover between the F5 LTM devices that are configured in an HA Pair with a single traffic-group. The BIG-IP Administrator wants to implement the Mac Masquerade feature for this quick failover and run this command: tmsh modify /cm traffic-group traffic-group-1 mac 02:12:34:56:00:00. However, the Network Operations team has identified an issue with the use of the same MAC address being used within different VLANs. As a result of this, the BIG-IP Administrator must implement the Per-VLAN Mac Masquerade in order to have a unique MAC address on each VLAN: tmsh modify /sys db tm.macmasqaddr_per_vlan value true. What would be the resulting MAC address on a tagged VLAN of 1501?
정답:D
설명:
MAC Masquerade allows a traffic group to use a shared MAC address to speed up failover. When the system DB variable tm.macmasqaddr_per_vlan is enabled, the BIG-IP generates a unique MAC address for each VLAN by algorithmically modifying the base MAC address using the VLAN ID.
The calculation for VLAN 1501 works as follows:
Base MAC: The administrator set the base to 02:12:34:56:00:00.
VLAN ID Conversion: The decimal VLAN ID (1501) must be converted into hexadecimal.
$1501 \div 16 = 93$ remainder 13 (D in hex)
$93 \div 16 = 5$ remainder 13 (D in hex)
$5 \div 16 = 0$ remainder 5
Result: $1501$ (Decimal) = 05DD (Hex).
Substitution: The BIG-IP replaces the last two octets of the base MAC address with the hexadecimal representation of the VLAN ID.
Final Result: 02:12:34:56:05:dd.
질문 # 59
An ecommerce company is experiencing latency issues with online shops during Black Friday's peak season.
The BIG-IP Administrator detects an overall high CPU load on the BIG-IP device and wants to move the top utilized Virtual Servers to a dedicated BIG-IP device. Where should the BIG-IP Administrator determine the problematic Virtual Servers? (Choose one answer)
정답:A
설명:
When troubleshooting performance and latency issues on BIG-IP, especially under peak load conditions, it is critical to identify which Virtual Servers are consuming the most resources. This is a core data plane analysis task.
BIG-IP provides multiple views of configuration and status, but only certain areas expose real-time and historical traffic statistics that correlate directly with CPU usage and throughput.
Why Option C Is Correct:
Statistics > Module Statistics > Local Traffic > Virtual Servers provides:
* Real-time and cumulative statistics per Virtual Server
* Metrics such as:
* Bits in / Bits out
* Packets in / Packets out
* Current connections
* Connection rate
* Total requests
* The ability to identify high-traffic or high-connection Virtual Servers, which are the most likely contributors to elevated CPU utilization These statistics allow the administrator to objectively determine which Virtual Servers are the top consumers of system resources and therefore good candidates for migration to a dedicated BIG-IP device.
Why the Other Options Are Incorrect:
* A. Local Traffic > Virtual Servers > Virtual Server List
* Primarily a configuration view
* Does not provide sufficient performance or utilization statistics to identify CPU-heavy Virtual Servers
* B. System > Platform
* Displays hardware-level information such as CPU cores, memory, disk, and platform type
* Does not break down utilization by Virtual Server
* D. Local Traffic > Network Map
* Provides a logical topology view of Virtual Servers, pools, and pool members
* Useful for understanding relationships, but not for identifying high-utilization Virtual Servers Key Data Plane Concept Reinforced:
To diagnose performance problems and plan traffic redistribution, BIG-IP administrators must rely on Module and object-level statistics, not configuration screens. The Virtual Server statistics view is the authoritative location for identifying traffic hotspots that directly impact CPU and latency during peak events such as Black Friday.
질문 # 60
In the GUI, where should the BIG-IP Administrator configure an existing VLAN named external to a specific interface as untagged?
정답:A
설명:
In the BIG-IP system, VLANs are the logical entities that group physical interfaces or trunks together. To modify how a VLAN interacts with an interface, the administrator must navigate to the specific VLAN configuration object.
* VLAN List:This section displays all existing VLANs configured on the system.
* Interface Association:Within the properties of a specific VLAN (in this case, "external"), there is an Interfacessection. This is where physical ports or trunks are assigned to the VLAN.
* Tagging Status:For each associated interface, the administrator can choose betweenTagged(802.1Q) or Untagged.
* Untagged:The interface will treat incoming traffic without a VLAN header as part of this VLAN, and outgoing traffic will not have a VLAN tag added. An interface can only be "Untagged" for one VLAN.
* Tagged:Allows an interface to carry traffic for multiple VLANs simultaneously by using 802.1Q headers.
질문 # 61
When using the setup utility to configure a redundant pair, you are asked to provide a "Failover Peer IP". Which address is this?
정답:D
질문 # 62
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