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301b Sample Questions Answers

Questions 4

An application is configured on an LTM device:

Virtual server: 10.0.0.1:80 (VLAN vlan301)

SNAT IP: 10.0.0.1

Pool members: 10.0.1.1:8080, 10.0.1.2:8080, 10.0.1.3:8080 (VLAN vlan302)

Which packet capture should the LTM Specialist perform on the LTM device command line interface to capture only client traffic specifically for this virtual server?

Options:

A.

tcpdump -ni 0.0:nnn -s 0 'host 10.0.0.1' -w /var/tmp/trace.cap

B.

tcpdump -ni vlan301 -s 0 'port 80 and host 10.0.0.1' -w /var/tmp/trace.cap

C.

tcpdump -ni vlan301 -s 0 'port 8080 and host 10.0.1.1 or host 10.0.1.2 or host 10.0.1.3' -w /var/tmp/trace.cap

D.

tcpdump -ni vlan302 -s 0 'port 8080 and host 10.0.1.1 or host 10.0.1.2 or host 10.0.1.3' -w /var/tmp/trace.cap

E.

tcpdump -ni 0.0:nnn -s 0 '(port 80 and host 10.0.0.1) or (port 8080 and host 10.0.1.1 or host 10.0.1.2 or host 10.0.1.3)' -w /var/tmp/trace.cap

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Questions 5

An LTM Specialist receives a request to monitor the network path through a member, but NOT the member itself.

Which monitor option should the LTM Specialist enable or configure?

Options:

A.

Reverse

B.

Up interval

C.

Transparent

D.

Alias address

E.

Time until up

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Questions 6

An LTM Specialist is troubleshooting an issue with a new virtual server. When connecting through the virtual server, clients receive the message "Unable to connect" in the browser, although connections directly to the pool member show the application is functioning correctly. The LTM device configuration is:

ltm virtual /Common/vs_https {

destination /Common/10.10.1.110:443

ip-protocol udp

mask 255.255.255.255

pool /Common/pool_https

profiles {

/Common/udp { }

}

translate-address enabled

translate-port enabled

vlans-disabled

}

ltm pool /Common/pool_https {

members {

/Common/172.16.20.1:443 {

address 172.16.20.1

}

}

}

What issue is the LTM Specialist experiencing?

Options:

A.

The virtual server is disabled on all VLANs.

B.

The pool member is marked down by a monitor.

C.

The pool member is marked down administratively.

D.

The virtual server is configured for the incorrect protocol.

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Questions 7

An LTM Specialist configures a new HTTP virtual server on an LTM device external VLAN. The web servers are connected to the LTM device internal VLAN. Clients trying to connect to the virtual server are unable to establish a connection. A packet capture shows an HTTP response from a web server to the client and then a reset from the client to the web server.

From which two locations could the packet capture have been collected? (Choose two.)

Options:

A.

network interface of web server

B.

network interface of client machine

C.

internal VLAN interface of the LTM device

D.

external VLAN interface of the LTM device

E.

management VLAN interface of the LTM device

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Questions 8

An LTM Specialist must perform a hot fix installation from the command line.

What is the correct procedure to ensure that the installation is successful?

Options:

A.

import the hot fix to the /var/shared/images directory

check the integrity of the file with an md5 checksum

tmsh apply sys software hotfix volume .iso

B.

import the hot fix to the /var/shared/images directory

check the integrity of the file with an md5 checksum

tmsh install sys software hotfix .iso volume

C.

import the hot fix to the /shared/images directory

check the integrity of the file with an md5 checksum

tmsh apply sys software hotfix volume .iso

D.

import the hot fix to the /shared/images directory

check the integrity of the file with an md5 checksum

tmsh install sys software hotfix .iso volume

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Questions 9

-- Exhibit –

-- Exhibit --

Refer to the exhibits.

Users are able to access the application when connecting directly to the web server but are unsuccessful when connecting to the virtual server. Return traffic bypasses the LTM device using Layer 2 nPath routing.

Which configuration change resolves this problem?

Options:

A.

Enable a SNAT pool on the LTM device.

B.

Disable address translation on the LTM device.

C.

Configure a route on the web server to the client subnet.

D.

Configure the virtual server to listen on port 80 on the LTM device.

E.

Configure the VIP address on the loopback interface of the web server.

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Questions 10

-- Exhibit –

-- 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.

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Questions 11

An LTM Specialist has just manually failed the active LTM device over to the standby LTM device. The LTM Specialist notices the newly active LTM device is NOT currently receiving traffic. The LTM Specialist verifies the newly active device is responding to ARP but still no traffic is hitting the virtual servers. The LTM Specialist also notices that the virtual servers eventually start responding.

What should be added to the configuration to resolve the problem?

Options:

A.

vlan failsafe

B.

floating self IP

C.

network failover

D.

MAC masquerading

E.

connection mirroring

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Questions 12

An LTM Specialist configures two LTM devices in a high-availability pair with trusts established and device groups configured properly using network failover. After several months, the LTM Specialist notices that changes made to one LTM device do NOT cause the synchronization status to update to "changes pending," and this device does NOT synchronize with the device group.

Which two steps should the LTM Specialist take to identify the issue? (Choose two.)

Options:

A.

Verify that NTP is synchronized.

B.

Verify the network connectivity between the devices.

C.

Verify that the devices are not using self-signed certificates.

D.

Verify that ConfigSync is using the management IP address.

E.

Verify that port lockdown on the ConfigSync interface is set to allow port 1026.

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Questions 13

-- Exhibit –

-- 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.

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Questions 14

The active LTM device in a high-availability (HA) pair performs a failover at the same time the network team reports an outage of a switch on the network.

Which two items could have caused the failover event? (Choose two.)

Options:

A.

a VLAN fail-safe setting

B.

a monitor on a pool in an HA group

C.

the standby LTM that was rebooted

D.

an Auditor role that has access to the GUI

E.

the standby LTM that lost connectivity on the failover VLAN

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Questions 15

An LTM Specialist configures an HTTP monitor as follows:

ltm monitor http stats_http_monitor {

defaults-from http

destination *:*

interval 5

recv "Health check: OK"

send "GET /stats/stats.html HTTP/1.1\\r\\nHost: www.example.com\\r\\nAccept-EncodinG. gzip, deflate\\r\\nConnection: close\\r\\n\\r\\n"

time-until-up 0

timeout 16

}

The monitor is marking all nodes as down. A trace of the HTTP conversation shows the following:

GET /stats/stats.html HTTP/1.1

Host: www.example.com

Accept-EncodinG. gzip, deflate

Connection: close

HTTP/1.1 401 Authorization Required

DatE. Tue, 23 Oct 2012 19:38:56 GMT

Server: Apache/2.2.15 (Unix)

WWW-AuthenticatE. Basic realm="Please enter your credentials"

Content-LengtH. 480

Connection: close

Content-TypE. text/html; charset=iso-8859-1

Which action will resolve the problem?

Options:

A.

Add an NTLM profile to the virtual server.

B.

Add a valid username and password to the monitor.

C.

Use an HTTPS monitor with a valid certificate instead.

D.

Add a backslash before the colon in the receive string.

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Questions 16

Internet clients connecting to a virtual server to download a file are experiencing about 150 ms of latency and no packet loss.

Which built-in client-side TCP profile provides the highest throughput?

Options:

A.

tcp

B.

tcp-legacy

C.

tcp-lan-optimized

D.

tcp-wan-optimized

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Questions 17

-- Exhibit –

-- Exhibit --

Refer to the exhibit.

Which two items can be consolidated to simplify the LTM configuration? (Choose two.)

Options:

A.

/Common/vs1-https-redirect

B.

/Common/vs2-https-redirect

C.

/Common/vs3-https-redirect

D.

/Common/vs4-https-redirect

E.

/Common/vs5-https-redirect

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Questions 18

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.

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Questions 19

-- Exhibit –

-- Exhibit --

Refer to the exhibit.

Which URL should be reported to the server/application team as getting user-visible errors?

Options:

A.

/env.cgi

B.

/page14.cgi

C.

/reflector.php

D.

/browserspecific.html

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Questions 20

An LTM Specialist is troubleshooting a problem on an eCommerce website. The user browses the online store using port 80, adding items to the shopping cart. The user then clicks the "Checkout" button on the site, which redirects the user to port 443 for the checkout process. Suddenly, the user's shopping cart is shown as empty. The shopping cart data is stored in memory on the server, and the default source address persistence profile is used on both virtual servers.

How should the LTM Specialist resolve this issue?

Options:

A.

Add an HTTP profile to both virtual servers.

B.

Enable SNAT Automap on both virtual servers.

C.

Create a custom persistence profile and enable "Map Proxies."

D.

Create a custom persistence profile and enable "Match Across Services."

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Questions 21

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

GET / HTTP/1.1

Host: www.f5.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

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 HTTP header should the LTM Specialist remove from the request to ensure the content can be matched and modified?

Options:

A.

Connection

B.

Accept

C.

Cache-Control

D.

Accept-Encoding

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Questions 22

-- Exhibit –

-- Exhibit --

Refer to the exhibit.

An LTM Specialist sets up AVR alerts and notifications for a specific virtual server if the server latency exceeds 50ms. The LTM Specialist simulates a fault so that the server latency is consistently exceeding the 50ms threshold; however, no alerts are being received.

Which configuration should the LTM Specialist modify to achieve the expected results?

Options:

A.

The rule should be adjusted to trigger when server latency is above 50ms.

B.

SNMP alerting should be enabled to allow e-mail to be sent to the support team.

C.

User Agents needs to be enabled to ensure the correct information is collected to trigger the alert.

D.

The metric "Page Load Time" needs to be enabled to ensure that the correct information is collected.

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Questions 23

An LTM Specialist is troubleshooting a problem on an eCommerce website. The user browses the online store using port 80, adding items to the shopping cart. The user then clicks the "Checkout" button on the site, which redirects the user to port 443 for the checkout process. Suddenly, the user's shopping cart is shown as empty. The shopping cart data is stored in memory on the server, and the default source address persistence profile is used on both virtual servers.

What is the issue?

Options:

A.

The port 80 pool member is deleting the user's session cookie.

B.

The port 443 pool member is deleting the user's session cookie.

C.

The port 80 and port 443 connections are balanced to the same node.

D.

The port 80 and port 443 connections are balanced to different nodes.

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Questions 24

Which two alerting capabilities can be enabled from within an application visibility reporting (AVR) analytics profile? (Choose two.)

Options:

A.

sFlow

B.

SNMP

C.

e-mail

D.

LCD panel alert

E.

high speed logging (HSL)

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Questions 25

A customer needs to intercept all of the redirects its application is sending to clients. When a redirect is matched, the customer needs to log a message including the client IP address.

Which iRule should be used?

Options:

A.

when HTTP_RESPONSE {

if { [HTTP::is_3xx] } {

log local0. "redirecting client ip address [IP::addr [IP::remote_addr]]"

}

}

B.

when HTTP_REQUEST {

if { [HTTP::is_301] } {

log local0. "redirecting client ip address [IP::addr [IP::remote_addr]]"

}

}

C.

when HTTP_REQUEST {

if { [HTTP::is_redirect] } {

log local0. "redirecting client ip address [IP::addr [IP::remote_addr]]"

}

}

D.

when HTTP_RESPONSE {

if { [HTTP::is_redirect] } {

log local0. "redirecting client ip address [IP::addr [IP::remote_addr]]"

}

}

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Questions 26

-- Exhibit –

-- Exhibit --

Refer to the exhibits.

A virtual server has been configured for SSL offload on a single-arm network. On average, the virtual server will be handling 100,000 connections, with a peak of 130,000 connections. Between the virtual server and the web servers there is a single reverse proxy to provide site caching. The proxy is configured to perform source IP persistence before contacting the web servers. The site is logging users out immediately after logging them in.

What should the LTM Specialist do to resolve this issue?

Options:

A.

Add a source address persistence profile to the virtual server.

B.

Create an iRule to add client IP persistence to a SNAT pool member.

C.

Change the virtual server server-side TCP profile to tcp-lan-optimized.

D.

Configure the virtual server HTTP profile to insert an X-Forwarded-For header.

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Questions 27

-- Exhibit –

-- Exhibit --

Refer to the exhibit.

A pair of LTM devices are configured for HA. The LTM Specialist observes from a capture that there is a successful connection from a client directly to a web server and an unsuccessful connection from a client via the LTM device to the same web server.

Which two solutions will solve the configuration problem? (Choose two.)

Options:

A.

Configure SNAT on the pool.

B.

Configure SNAT on the virtual server.

C.

Change server default gateway to point at LTM internal self IP.

D.

Change server default gateway to point at LTM internal floating IP.

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Questions 28

A virtual server for a set of web services is constructed on an LTM device. The LTM Specialist has created an iRule and applied this iRule to the virtual server:

when HTTP_REQUEST {

switch [HTTP::uri] {

"/WS1/ws.jsp" {

log local0. "[HTTP::uri]-Redirected to JSP Pool"

pool JSP

}

default { log local0. "[HTTP::uri]-Redirected to Non-JSP Pool"

pool NonJSP

}

}

}

However, the iRule is NOT behaving as expected. Below is a snapshot of the log:

/WS1/ws.jsp-Redirected to JSP Pool

/WS1/ws.jsp-Redirected to JSP Pool

/WS1/ws.jsp-Redirected to JSP Pool

/WS1/WS.jsp-Redirected to Non-JSP Pool

/ws1/WS.jsp-Redirected to Non-JSP Pool

/WS1/ws.jsp-Redirected to JSP Pool

/ws1/ws.jsp-Redirected to Non-JSP Pool

What is the problem?

Options:

A.

The condition in the iRule is case sensitive.

B.

The 'switch' command in the iRule has been used incorrectly.

C.

The pool members of both pools need to be set up as case-insensitive members.

D.

The "Process Case-Insensitivity" option for the virtual server needs to be selected.

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Questions 29

-- Exhibit –

-- Exhibit --

Refer to the exhibit.

An LTM Specialist is troubleshooting an issue with an application configured on an LTM device. The application works properly when accessed directly via the servers; however, it does not work when accessed via the LTM device. The virtual server, 192.168.1.211:443, is configured to SNAT using the address 192.168.1.144 and references a pool with the member 192.168.10.80:443. The virtual server has no Client or Server SSL profiles associated.

Which configuration change will allow the application to function through the virtual server?

Options:

A.

Change pool member port to 8443.

B.

Change virtual server port to 8443.

C.

Add SSL off-loading to the pool member.

D.

Add Client and Server SSL profiles to the virtual server.

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Questions 30

An LTM Specialist has just captured trace /var/tmp/trace.cap for site www.example.com while listening on virtual address 10.0.0.1:443 configured on partition ApplicationA. The data payload being captured is SSL encrypted.

Which command should the LTM Specialist execute to decrypt the data payload?

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Questions 31

An application is configured on an LTM device:

Virtual server: 10.0.0.1:80 (VLAN vlan301)

SNAT IP: 10.0.0.1

Pool members: 10.0.1.1:8080, 10.0.1.2:8080, 10.0.1.3:8080 (VLAN vlan302)

Which packet capture should the LTM Specialist perform on the LTM device command line interface to capture only server traffic specifically for this application?

Options:

A.

tcpdump -ni 0.0:nnn -s 0 'host 10.0.0.1' -w /var/tmp/trace.cap

B.

tcpdump -ni vlan301 -s 0 'port 80 and host 10.0.0.1' -w /var/tmp/trace.cap

C.

tcpdump -ni vlan302 -s 0 'port 8080 and (host 10.0.1.1 or host 10.0.1.2 or host 10.0.1.3)' -w /var/tmp/trace.cap

D.

tcpdump -ni 0.0:nnn -s 0 '(port 80 and host 10.0.0.1) or (port 8080 and host 10.0.1.1 or host 10.0.1.2 or host 10.0.1.3)' -w /var/tmp/trace.cap

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Exam Code: 301b
Exam Name: LTM Specialist: Maintain & Troubleshoot
Last Update: May 1, 2024
Questions: 209
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