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F5 301b Exam - BIG-IP Local Traffic Manager (LTM) Specialist: Maintain & Troubleshoot

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Question #1

-- Exhibit


-- Exhibit --
Refer to the exhibits.
Every monitor has the same Send String, Recv String, and an Alias of *:*. The LTM
Specialist simplifies the configuration to minimize the number of monitors.
How many unique monitors remain?

A. 1

B. 2

C. 3

D. 4

E. 5

Question #2

-- Exhibit

-- Exhibit --
Refer to the exhibit.
An LTM Specialist is troubleshooting a new HTTP monitor on a pool. The pool member is
functioning correctly when accessed directly through a browser, although the monitor is
marking the member as down. As part of the troubleshooting, the LTM Specialist has
captured the monitor traffic via tcpdump.
How should the LTM Specialist resolve this issue?

A. Add the 'http' monitor to the pool.

B. Add the 'icmp' monitor to the node.

C. Modify the receive string to valid content.

D. Correct the firewall rules on the pool member.

Question #3

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?

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]]" } }

Question #4

An LTM Specialist realizes that a datacenter engineer has changed the console baud rate.
Which command determines the current baud rate via the command line interface?

A. tmsh show /ltm console

B. tmsh show /sys console

C. tmsh list /sys baud-rate

D. tmsh list /net baud-rate

Question #5

Which procedure should an LTM Specialist follow to move a configuration from a 1500 to a
1600 hardware platform during an upgrade?

A. tmsh save sys config file filename.scf copy the file from the /var/local/scf directory from one device to the other tmsh load sys config file filename.scf

B. tmsh save sys backup file filename.scf copy the file from the /var/local/scf directory from one device to the other tmsh load sys backup file filename.scf

C. tmsh save sys backup file filename.scf copy the file from the /var/local/ucs directory from one device to the other tmsh load sys backup file filename.scf

D. tmsh save sys config file filename.scf copy the file from the /var/local/ucs directory from one device to the other tmsh load sys config file filename.scf

Question #6

-- Exhibit

-- Exhibit --
Refer to the exhibit.
An LTM Specialist has created a virtual server to load balance traffic to a pool of HTTPS
servers. The servers use client certificates for user authentication. The virtual server has
clientssl, serverssl, and http profiles enabled. Clients are unable to connect to the
application through the virtual server. Clients are able to connect to the application servers
directly.
What is the root cause of the problem?

A. The application server does NOT support 2048-bit keys.

B. The clientssl profile is NOT set to require a client certificate.

C. The LTM device does NOT trust the issuing CA of the client certificate.

D. The application server does NOT see the client certificate due to SSL offload.

Question #7

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

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 #8

-- Exhibit

-- Exhibit --
Refer to the exhibit.

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.

Question #9

What is the recommended procedure for upgrading a major TMOS release on a BIG-IP
platform?

A. 1. Renew the device license. 2.Take a configuration backup. 3.Reboot the device to the non-active volume. 4.Upload the device code. 5.Install device code to the current volume.

B. 1. Take a configuration backup. 2.Upload the device code. 3.Install device code to the non-active volume. 4.Reboot the device to the non-active volume. 5.Renew the device license.

C. 1. Renew the device license. 2.Take a configuration backup. 3.Upload the device code. 4.Install device code to the non-active volume. 5.Reboot the device to the non-active volume.

D. 1. Take a configuration backup. 2.Reboot the device to the non-active volume. 3.Renew the device license. 4.Upload the device code. 5. Install device code to the current volume.

Question #10

An LTM Specialist configured a virtual server to load balance a custom application. The
application works when it is tested from within the firewall but it fails when tested externally.
The pool member address is 192.168.200.10:80. A capture from an external client shows:
GET /index.jsp HTTP/1.1
Host: 207.206.201.100
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20100101
Firefox/15.0.1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Connection: keep-alive
HTTP/1.1 302 Found
DatE.Wed, 17 Oct 2012 23:09:55 GMT
Server: Apache/2.2.15 (CentOS)
Location: http://192.168.200.10/user/home.jsp
Content-LengtH.304
Connection: close
What is the solution to this issue?

A. Assign a SNAT pool to the virtual server.

B. Add a Web Acceleration Profile to the virtual server.

C. Configure redirect rewrite option in the HTTP profile.

D. Configure a content filter on the backend web server.

Question #11

An LTM device has been configured to log the reasons for generating TCP RST packets.
The following log entry occurs:
"01230140:3: RST sent from 192.168.1.100:80 to 192.168.1.124:39272, [0x112d82a:1721]
{peer} TCP RST from remote system."
Which condition will trigger this log entry?

A. A virtual server connection limit has been reached.

B. The host at the other end terminated the TCP connection.

C. The LTM device reset the connection because no pool members are available.

D. The LTM device has reached the maximum number of allowed attempts to send the data segment to the affected TCP connection.

Question #12

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.)

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

Question #13

A new VLAN vlan301 has been configured on a highly available LTM device in partition

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 #14

-- Exhibit


-- Exhibit --
Refer to the exhibits.
Which two servers are missing two frequently used URLs? (Choose two.)

A. 172.16.20.1 /text.one /text.txt

B. 172.16.20.2 /text.one /text.txt

C. 172.16.20.1 /text.txt /browserspecific.html

D. 172.16.20.2 /text.one /browserspecific.html

E. 172.16.20.3 /text.one /browserspecific.html

Question #15

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 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
How should the LTM Specialist resolve this issue?

A. Remove an HTTP monitor from the pool.

B. Add an HTTP profile to the virtual server.

C. Enable the pool member on the correct VLAN.

D. Select the correct protocol for the virtual server.

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