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F5 301b LTM Specialist: Maintain & Troubleshoot Exam Practice Test

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Total 209 questions

LTM Specialist: Maintain & Troubleshoot Questions and Answers

Question 1

-- Exhibit –

Question # 1

-- Exhibit --

Refer to the exhibit.

An LTM Specialist has uploaded a qkview to F5 iHealth.

Within the GUI, what is the correct procedure to comply with the recommendation shown in the exhibit?

Options:

A.

Obtain product version image from release.f5.com.

Overwrite existing image with new product version image.

Select product version image and click Install.

Select the available disk and volume set name.

B.

Obtain product version image from images.f5.com.

Overwrite existing image with new product version image.

Select product version image and click Install.

Select the available disk and volume set name.

C.

Obtain product version image from downloads.f5.com.

Import product version image.

Install image onto BIG-IP platform.

Select product version image and click Install.

Select the available disk and volume set name.

D.

Log a call requesting the product version image via websupport.f5.com

Import product version image.

Install image onto BIG-IP platform.

Select product version image and click Install.

Select the available disk and volume set name.

Question 2

An LTM Specialist is receiving reports from customers about multiple applications failing to work properly. The LTM Specialist looks at the services running and notices that the bigd process has NOT started.

How are monitored LTM device objects marked when the bigd process is stopped?

Options:

A.

red or offline

B.

blue or unchecked

C.

green or available

D.

unchanged until bigd is restarted

Question 3

A failover event is recorded in the log messages:

Jan 01 00:00:50 BIG-IP notice sod[5855]: 01140029:5: HA proc_running tmm fails action is go offline and down links.

Jan 01 00:00:50 BIG-IP notice sod[5855]: 010c0050:5: Sod requests links down.

Jan 01 00:00:50 BIG-IP notice sod[5855]: 010c0054:5: Offline for traffic group /Common/traffic-group-1.

Jan 01 00:00:50 BIG-IP notice sod[5855]: 010c003e:5: Offline

Jan 01 00:00:50 BIG-IP notice logger: /usr/bin/tmipsecd --tmmcount 4 ==> /usr/bin/bigstart stop racoon

Jan 01 00:00:50 BIG-IP info lacpd[5502]: 01160016:6: Failover event detected. (Switchboard failsafe disabled while offline)

Jan 01 00:00:51 BIG-IP err bcm56xxd[5296]: 012c0010:3: Failover event detected. Marking external interfaces down. bsx.c(3633)

Jan 01 00:00:51 BIG-IP info bcm56xxd[5296]: 012c0015:6: Link: 1.1 is DOWN

Jan 01 00:00:56 BIG-IP notice mcpd[5318]: 0107143c:5: Connection to CMI peer 10.0.0.3 has been removed

Jan 01 00:00:56 BIG-IP notice mcpd[5318]: 0107143a:5: CMI reconnect timer: enabled

Jan 01 00:00:56 BIG-IP notice mcpd[5318]: 01071431:5: Attempting to connect to CMI peer 10.0.0.3 port 6699

What is the cause of the failover?

Options:

A.

TMM failed, and VLAN fail-safe initiated the failover.

B.

TMM failed, and system fail-safe initiated the failover.

C.

Loss of connection to CMI peer 10.0.0.3 initiated the failover.

D.

A switchboard failure caused system fail-safe to initiate the failover.

Question 4

What is the effect of an iRule error such as referencing an undefined variable?

Options:

A.

The iRule execution will continue with the next statement.

B.

The execution of the current event within the iRule will be terminated.

C.

The iRule execution will be terminated, and both the client and server side connections will be reset.

D.

The connection will continue, but the iRule will NOT be executed again for the lifetime of the connection.

Question 5

-- Exhibit –

Question # 5

-- Exhibit --

Refer to the exhibit.

An LTM Specialist is working on an LTM 11.0.0 installation and has identified a security vulnerability as shown in the exhibit. The LTM Specialist is tasked with applying the latest available hotfix to resolve the problem.

Which procedure resolves the problem?

Options:

A.

Browse to System > Software Management > Hotfix List.

Import TMOS 11.2.0 to the available hotfix images.

Select the imported hotfix image and installation location and click Install.

B.

Browse to System > Software Management > Hotfix List.

Import 11.1.0.HF3 to the available hotfix images.

Select the imported hotfix image and installation location and click Install.

C.

Browse to System > Software Management > Image List.

Import TMOS 11.2.0 to the available hotfix images.

Select the imported hotfix image and installation location and click Install.

D.

Browse to System > Software Management > Image List.

Import 11.1.0.HF3 to the available hotfix images.

Select the imported hotfix image and installation location and click Install.

Question 6

-- Exhibit –

Question # 6

-- Exhibit --

Refer to the exhibit.

Which step should an LTM Specialist take next to finish upgrading to HD1.3?

Options:

A.

Install image to HD1.3

B.

Install hotfix to HD1.3

C.

Activate HD1.3

D.

Relicense HD1.3

Question 7

-- Exhibit –

Question # 7

Question # 7

-- Exhibit --

Refer to the exhibits.

An LTM Specialist has configured a virtual server to distribute connections to a pool of application servers and to offload SSL processing. The application fails to work as expected when connecting to the virtual server. It does work when clients connect directly to the application. Two packet captures were taken at the application server.

What is the root cause of the problem?

Options:

A.

The application servers are NOT listening on port 80.

B.

The LTM device is sending non-SSL traffic to an SSL port.

C.

The virtual server does NOT have a clientSSL profile assigned.

D.

The SSL handshake between the LTM device and the server is failing.

Question 8

-- Exhibit –

Question # 8

-- Exhibit --

Refer to the exhibit.

Based on the output of the tmsh interface show command, what is the issue?

Options:

A.

There is a duplex mismatch on the management interface.

B.

Interfaces 2.1 and 2.2 are defective and need replacement.

C.

Flow Control is NOT configured on the management interface.

D.

There are too many drops on inbound traffic on interface 1.1.

Question 9

An LTM device pair is configured for failover and connection mirroring. The LTM devices are configured with virtual servers for HTTP, HTTPS with SSL offload, and SSH. An event occurs that causes a failover. HTTP and SSH sessions active at the time of failover remain active, but HTTPS sessions are dropped.

What is the root cause of this problem?

Options:

A.

The SSL certificates on the LTM devices do NOT match.

B.

Connection mirroring is incompatible with clientssl profiles.

C.

SNAT automap was NOT enabled for the HTTPS virtual servers.

D.

Connection mirroring was NOT enabled for the HTTPS virtual servers.

Question 10

-- Exhibit –

Question # 10

-- Exhibit --

Refer to the exhibit.

Which profile could be removed or changed on this virtual server to reduce CPU load on the LTM device without increasing server side bandwidth usage?

Options:

A.

tcp

B.

http

C.

httpcompression

D.

optimized-caching

Question 11

A new VLAN vlan301 has been configured on a highly available LTM device in partition ApplicationA. A new directly connected backend server has been placed on vlan301. However, there are connectivity issues pinging the default gateway. The VLAN self IPs configured on the LTM devices are 192.168.0.251 and 192.168.0.252 with floating IP 192.168.0.253. The LTM Specialist needs to perform a packet capture to assist with troubleshooting the connectivity.

Which command should the LTM Specialist execute on the LTM device command line interface to capture the attempted pings to the LTM device default gateway on VLAN vlan301?

Options:

A.

tcpdump -ni /ApplicationA/vlan301 'host 192.168.0.253'

B.

tcpdump -ni vlan301 'host 192.168.0.253'

C.

tcpdump -ni /ApplicationA/vlan301 'host 192.168.0.251 or host 192.168.0.252'

D.

tcpdump -ni vlan301 'host 192.168.0.251 or host 192.168.0.252'

Question 12

An LTM Specialist needs to rewrite text within an HTML response from a web server. A client is sending the following HTTP request:

GET / HTTP/1.1

Host: www.example.com

User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20100101 Firefox/16.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Accept-LanguagE. en-US,en;q=0.5

Accept-EncodinG. gzip, deflate

Cache-Control: no-cache

Connection: keep-alive

CookiE. somecookie=1

HTTP/1.1 200 OK

Server: Apache/2.2.15 (Unix)

Last-ModifieD. Wed, 12 Aug 2009 00:00:30 GMT

Accept-Ranges: bytes

Content-LengtH. 1063

X-Cnection: close

Content-TypE. text/html; charset=UTF-8

Vary: Accept-Encoding

Content-EncodinG. gzip

Connection: Keep-Alive

Although a stream profile has been added to the virtual server, the content within the HTTP response is NOT being matched and therefore NOT modified.

Which header field is contributing to the issue?

Options:

A.

HTTP Method

B.

Cookie content

C.

User-Agent Value

D.

Accept-Encoding header

Question 13

An LTM device has a virtual server configured as a Performance Layer 4 virtual listening on 0.0.0.0:0 to perform routing of packets to an upstream router. The client machine at IP address 192.168.0.4 is attempting to contact a host upstream of the LTM device on IP address 10.0.0.99.

The network flow is asymmetrical, and the following TCP capture displays:

# tcpdump -nnni 0.0 'host 192.168.0.4 and host 10.0.0.99'

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode

listening on 0.0, link-type EN10MB (Ethernet), capture size 96 bytes

05:07:55.499954 IP 192.168.0.4.35345 > 10.0.0.99.443: S 3205656213:3205656213(0) ack 3267995082 win 1480

05:07:55.499983 IP 10.0.0.99.443 > 192.168.0.4.35345: R 1:1(0) ack 1 win 0

05:07:56.499960 IP 192.168.0.4.35345 > 10.0.0.99.443: S 3205656213:3205656213(0) ack 3267995082 win 1480

05:07:56.499990 IP 10.0.0.99.443 > 192.168.0.4.35345: R 1:1(0) ack 1 win 0

4 packets captured

Which option within the fastL4 profile needs to be enabled by the LTM Specialist to prevent the LTM device from rejecting the flow?

Options:

A.

Loose Close

B.

Loose Initiation

C.

Reset on Timeout

D.

Generate Initial Sequence Number

Question 14

A user is having issues with connectivity to an HTTPS virtual server. The virtual server is on the LTM device's external vlan, and the pools associated with the virtual server are on the internal vlan. An LTM Specialist does a tcpdump on the external interface and notices that the host header is incomplete.

In which location should the LTM Specialist put a traffic analyzer to gather the most pertinent data?

Options:

A.

server

B.

external VLAN

C.

internal VLAN

D.

client machine

Question 15

-- Exhibit –

Question # 15

Question # 15

-- Exhibit --

Refer to the exhibits.

How should the LTM Specialist minimize the configuration?

Options:

A.

Remove the pool member level monitors.

B.

The configuration is as minimized as possible.

C.

Create a single monitor and apply it to each pool member.

D.

Create a single monitor, apply it to the pool, and remove the pool member level monitors.

Question 16

-- Exhibit –

Question # 16

Question # 16

-- Exhibit --

Refer to the exhibits.

An LTM device has been configured for load balancing a number of different application servers. Configuration changes need to be made to the LTM device to allow administrative management of the servers in 172.16.10/24, 172.16.20/24, and 172.16.30/24 networks. The servers require outbound access to numerous destinations for operations.

Which solution has the simplest configuration changes while maintaining functionality and basic security?

Options:

A.

Remove 172.16.10.0:0/24, 172.16.20.0:0/24, and 172.16.30.0:0/24, and keep 0.0.0.0:0/0.0.0.0 enabled on all VLANs.

B.

Replace 172.16.10.0:0/24, 172.16.20.0:0/24, and 172.16.30.0:0/24, with 172.16.0.0:0/16, and keep 0.0.0.0:0/0.0.0.0.

C.

Enable 172.16.10.0:0/24, 172.16.20.0:0/24, and 172.16.30.0:0/24 on ingress VLAN(s), and enable 0.0.0.0:0/0.0.0.0 on egress VLAN(s).

D.

Enable 172.16.10.0:0/24, 172.16.20.0:0/24, and 172.16.30.0:0/24 on egress VLAN(s), and enable 0.0.0.0:0/0.0.0.0 on ingress VLAN(s).

Question 17

-- Exhibit --

Question # 17

-- Exhibit --

Refer to the exhibit.

A company uses a complex piece of client software that connects to one or more virtual servers (VS) hosted on an LTM device. The client software is experiencing issues. An LTM Specialist must determine the cause of the problem. The LTM Specialist has the tcpdump extract. The client loses connection with the LTM device.

Where is the reset originating?

Options:

A.

the local switch

B.

the application server

C.

the device initiating the connection

D.

the destination device of the initial connection

Question 18

A OneConnect profile is applied to a virtual server. The LTM Specialist would like the client source IP addresses within the 10.10.10.0/25 range to reuse an existing server side connection.

Which OneConnect profile source mask should the LTM Specialist use?

Options:

A.

0.0.0.0

B.

255.255.255.0

C.

255.255.255.128

D.

255.255.255.224

E.

255.255.255.255

Question 19

-- Exhibit –

Question # 19

-- Exhibit --

Refer to the exhibit.

The decoded TCPDump capture is a trace of a failing health monitor. The health monitor is sending the string shown in the capture; however, the server response is NOT as expected. The receive string is set to 'SERVER IS UP'.

What is the solution?

Options:

A.

The GET request Host header field requires a host name.

B.

Incorrect syntax in send string. 'HTTP/1.1' should be 'HTTP1.1'.

C.

The /test_page.html does NOT exist on the web server and should be added.

D.

Incorrect syntax in send string. 'Connection: Close' should be 'Connection: Open'.

Question 20

An LTM Specialist troubleshooting an issue looks at the following /var/log/ltm entries:

Oct 2 04:52:42 slot1/tmm7 crit tmm7[21734]: 01010201:2: Inet port exhaustion on 10.143.109.5 to 10.143.147.150:53 (proto 17)

Oct 2 05:37:16 slot1/tmm7 crit tmm7[21734]: 01010201:2: Inet port exhaustion on 10.143.109.5 to 10.143.147.150:53 (proto 17)

Oct 2 05:57:32 slot1/tmm2 crit tmm2[21729]: 01010201:2: Inet port exhaustion on 10.143.109.5 to 10.143.147.150:53 (proto 17)

Oct 2 06:30:03 slot1/tmm7 crit tmm7[21734]: 01010201:2: Inet port exhaustion on 10.143.109.5 to 10.143.147.150:53 (proto 17)

Oct 2 06:37:44 slot1/tmm2 crit tmm2[21729]: 01010201:2: Inet port exhaustion on 10.143.109.5 to 10.143.147.150:53 (proto 17)

Oct 2 06:47:05 slot1/tmm5 crit tmm5[21732]: 01010201:2: Inet port exhaustion on 10.143.109.5 to 10.143.147.150:53 (proto 17)

Which configuration item should the LTM Specialist review to fix the issue?

Options:

A.

SNAT Pool

B.

Pool Member

C.

Port Lockdown

D.

Virtual Server Port Translation

Question 21

What is the correct command to reset an LTM device to its default settings?

Options:

A.

tmsh reset-all default

B.

tmsh set /sys config defaults

C.

tmsh load /sys config default

D.

tmsh /util bigpipe reset-factory-defaults

Question 22

-- Exhibit –

Question # 22

-- Exhibit --

Refer to the exhibit.

Which step should an LTM Specialist take to utilize AVR?

Options:

A.

provision AVR

B.

reboot the device

C.

install the AVR add-on

D.

license the device for AVR

Question 23

An FTP monitor is NOT working correctly.

Which three pieces of information does the LTM Specialist need to provide to ensure a properly working FTP monitor? (Choose three.)

Options:

A.

alias

B.

File path

C.

username

D.

password

E.

FTP server port

F.

FTP server IP address

Question 24

-- Exhibit –

Question # 24

-- Exhibit --

Refer to the exhibit.

An LTM Specialist is investigating reports that users are unable to perform some commands through an FTP virtual server. The users are receiving the FTP error "500 Illegal PORT command." The virtual server is configured to SNAT using automap. The LTM Specialist performs a capture on the server side of the LTM device.

Why is the server returning this error?

Options:

A.

LIST command disallowed

B.

PORT command disallowed

C.

Active IP address in PORT command

D.

Active IP address in LOGIN command

Question 25

An LTM device supports two power supplies. The value of the BigDB key "platform.powersupplymonitor" is equal to enable.

Where would the error message be visible if one of the power supplies fails or is NOT plugged in?

Options:

A.

visible only via the console

B.

in the /var/log/ltm log file

C.

in the /var/log/kern.log file

D.

in the /var/log/tmm log file

Question 26

An LTM Specialist with the Administrator role and terminal access of "tmsh" logs in via ssh and is in the Traffic Manager Shell. The LTM Specialist wants to enter the bash shell to review log files.

Which command does the LTM Specialist need to run to access the bash shell?

Options:

A.

exit

B.

quit

C.

run /cli bash

D.

run /util bash

Question 27

-- Exhibit –

Question # 27

-- Exhibit --

Refer to the exhibit.

An LTM Specialist is troubleshooting an HTTP monitor that is marking a pool member as down. Connecting to the pool member directly through a browser shows the application is up and functioning correctly.

How should the send string be modified to correct this issue?

Options:

A.

GET /\r\n\r\n

B.

GET / HTTP/1.0\r\n\r\n

C.

GET /\r\nHost: \r\n\r\n

D.

GET /\r\nHTTP/1.0\r\n\r\n

Question 28

When re-licensing an LTM device from the command line interface, which tmsh command should the LTM Specialist use to generate the required information to provide on the F5 licensing portal?

Options:

A.

tmsh run /util get-dossier

B.

tmsh generate /sys dossier

C.

tmsh list /sys registration-key

D.

tmsh install /sys license registration-key

Question 29

Which command should the LTM Specialist use to determine the current system time?

Options:

A.

date

B.

time

C.

uname -a

D.

ntpq -p

Question 30

An active/standby pair of LTM devices deployed with network failover are working as desired. After external personnel perform maintenance on the network, the LTM devices are active/active rather than active/standby. No changes were made on the LTM devices during the network maintenance.

Which two actions would help determine the cause of the malfunction? (Choose two.)

Options:

A.

checking that the configurations are synchronized

B.

checking the configuration of the VLAN used for failover

C.

checking the configuration of the VLAN used for mirroring

D.

checking the open ports in firewalls between the LTM devices

E.

checking synchronization of system clocks among the network devices

Question 31

-- Exhibit –

Question # 31

-- Exhibit --

Refer to the exhibit.

An LTM Specialist is troubleshooting a virtual server. Both the virtual server and the pool are showing blue squares for their statuses, and new clients report receiving "The connection was reset" through their browsers. Connections directly to the pool member are successful.

What is the issue?

Options:

A.

The pool member is disabled.

B.

The node is marked as disabled.

C.

The HTTP profile has incorrect settings.

D.

The virtual server is disabled on all VLANs.

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Total 209 questions