F5 LTM Specialist 301A Questions & Answers

• Question 41:

  A web server is being overloaded with HTTPS traffic. To decrease the load on the server, the LTM Specialist and the Server. Administrator decide to perform SSL offloading on the LTM device. The configuration of the virtual server is as follows:

  

  Which change must be made to the configuration to perform SSL offloading?

  A. Remove the clientssl and http profiles

  B. Remove the clients profile

  C. Remove the clientssl and serverssl profiles

  D. Remove the severssl profile

  Correct Answer: D

• Question 42:

  An LTM Specialist is configuring a new virtual server on an LTM device and assigning a SNAT pool that is already is use another virtual server. Both virtual servers use the same pool members to load balance traffic. A maximum of 35,000 users needs to be able to access each virtual server ta any time. The network architecture does NOT allow the backend servers to use the LTM device as a default gateway. What is the minimum number of SNAT addresses required in the SNAT pool to meet the needs of the virtual servers?

  A. 2

  B. 3

  C. 4

  D. 1

  Correct Answer: A

  Both vs share the same snat pool, and both use the same pool member. Then the concurrent number of snatpool will be added. For each VS, there is a maximum of 35,000 users, and those two VSs have a maximum of 70,000 users. The stem did not mention how many connections each user would have concurrently. Calculated with a minimum of 1 connection, then 70,000 connections would be concurrent. One IP can support 65,535 connection. Therefore, at least 2 or more snaptips are required

• Question 43:

  An application is expected to maintain more than 100,000 concurrent TCP connections to a single pool

  member.

  What is an appropriate SNAT configuration in this situation?

  A. A SNAT pool with 4 IP addresses

  B. SNAT automap enabled

  C. A static SNAT

  D. A SNAT pool with IP address

  Correct Answer: A

• Question 44:

  AN LTM Specialist is using an external monitor evaluate the hard drive usage of a node. The monitor has

  marked the node down because it exceeded the specific threshold. The disk usage on the server has been

  corrected below the threshold, however, the node remains offline.

  Which feature is causing this problem?

  A. The parameter Time Until UP has a value greater than 0

  B. The value of Manual Resume is set to No

  C. The value for UP interval is enable with a value greater than 0

  D. The value for Manual Resume is set to Yes

  Correct Answer: D

• Question 45:

  An organization's development team creates an application to put behind the F5 LTM device. The application can be quite load intensive at first, and then evens out over time. The team's load balancing method needs to select a pool after taking into account the pool member's response over the time to avoid landing on a busy pool member. Which of the following load balancing methods meets this requirement?

  A. Fastest (application)

  B. Predictive (member)

  C. Dynamic (node)

  D. Observed (member)

  Correct Answer: B

• Question 46:

  An LTM Specialist reports that an application si no longer reachable after it has been upgraded. Nothing

  has been changed in the configuration on the LTM device. The logs indicates that health monitors to all

  servers have failed as shown:

  What should the LTM Specialist verify next?

  A. That the TCP hand shake with the servers is stall completed using tcpdump

  B. That the custom receive string for the HTTP monitor has changed with the upgrade

  C. That the can still ping the servers from te BIG_ IP device.

  D. That the firewall between the BIG-ip device and servers is still allowing HTTP

  Correct Answer: B

  The log shows that tcp detection is normal, but http detection is abnormal. So we should pay attention to the detection problem of http level

• Question 47:

  An application is being load balanced through the LTM device using the configuration displayed below. The network has been re-engineered to NAT all client connection. As a result, all client connections are hitting the same pool member.

  

  Which changes should the LTM Specialist make in order to restore load balancing functionality wile maintaining session persistence?

  A. Change the virtual server type to Standard, add an http profile, and change the persistence profile to Destination Address

  B. Leave the virtual server type set Performance (Layer 4) and change the persistence type to hash

  C. Change the virtual serer type to Forwarding (Layer 4) and leave the persistence type to hash source Address

  D. Change the virtual server to Standard add an http profile, and change the persistence profile to Cookie persistence

  Correct Answer: D

• Question 48:

  AN LTM Specialist needs to determine the delay between an LTM device and the internal web server for a

  specific client.

  Which two AVR reporting options should the LTM Specialist enable to measure the delay? (Choose two.)

  A. User agents

  B. Methods

  C. Response codes

  D. Server latency

  E. Client IP

  Correct Answer: DE

  The problem is to specify the server delay of the client

• Question 49:

  AN LTM Specialist is deploying an iRule designed to determine the country of origin of an incoming client connection. The iRule needs to be used with an SSL-enabled web application. Which profile required for the iRule to function properly?

  A. HTTP

  B. DNS

  C. TCP

  D. UDP

  Correct Answer: C

• Question 50:

  An LTM Specialist needs to apply SNAT using currently used SNAT pool to a new virtual server. What needs to be completed before applying that configuration change?

  A. Review connection for the selected SNAT pool and enlarge it if appropriate

  B. Make sure that the BIG-IP device is NOT operating under heavy load during peak times

  C. Verify that the IP address of the SNAT pool are in the same subnet as the pool members

  D. Verify that the IP address of the SNAT pool are in the same VLAN as the pool members.

  Correct Answer: A

  SNAT does not need to in the same vlan or same network segment as the pool member, as long as the route is reachable , excluding C and D he connection information of the SNAT pool to avoid port exhaustion under high concurrency