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NEW QUESTION 73
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?
- A. SNAT Pool
- B. Virtual Server Port Translation
- C. Port Lockdown
- D. Pool Member
Answer: A
NEW QUESTION 74
-- Exhibit -
-- Exhibit --
Refer to the exhibit.
A client attempts to connect from a Google Chrome browser to a virtual server on a BIG-IP LTM. The virtual server is SSL Offloaded. When the client connects, the client receives an SSL error. After trying Mozilla Firefox and Internet Explorer browsers, the client still receives the same errors.
The LTM Specialist does an ssldump on the virtual server and receives the results as per the exhibit.
What is the problem?
- A. The SSL key length is incorrect.
- B. The BIG-IP LTM is NOT serving a certificate.
- C. The BIG-IP LTM is NOT listening on port 443.
- D. The client needs to be upgraded to the appropriate cipher-suite.
Answer: B
NEW QUESTION 75
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?
- A. tcpdump -ni vlan301 -s 0 'port 80 and host 10.0.0.1' -w /var/tmp/trace.cap
- B. 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
- C. 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
- D. tcpdump -ni 0.0:nnn -s 0 'host 10.0.0.1' -w /var/tmp/trace.cap
Answer: B
NEW QUESTION 76
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?
- A. SNAT Pool
- B. Virtual Server Port Translation
- C. Port Lockdown
- D. Pool Member
Answer: A
NEW QUESTION 77
What is a benefit provided by F5 Enterprise Manager?
- A. Enterprise Manager allows administrators to establish baseline application usage and generate an alert if an administratively set threshold for the application is exceeded.
- B. Enterprise Manager allows administrators to analyze traffic flow and create custom application IPS signatures.
- C. Enterprise Manager allows administrators to monitor all application traffic. Configuration optimization suggestions based on the observed traffic patterns are then generated for the administrator to review and apply.
- D. Enterprise Manager allows administrators to identify application vulnerabilities. Virtual patches are then automatically generated and applied to remediate the detected application vulnerability.
Answer: A
NEW QUESTION 78
Windows PC clients are connecting to a virtual server over a high-speed, low-latency network with no packet loss.
Which built-in client-side TCP profile provides the highest throughput for HTTP downloads?
- A. tcp-legacy
- B. tcp-wan-optimized
- C. tcp-lan-optimized
- D. tcp
Answer: C
NEW QUESTION 79
-- 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. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: C
NEW QUESTION 80
An LTM Specialist must perform a packet capture on a virtual server with an applied standard FastL4 profile. The virtual server 10.0.0.1:443 resides on vlan301.
Which steps should the LTM Specialist take to capture the data payload successfully while ensuring no other virtual servers are affected?
- A. The packet capture tcpdump -ni vlan301 should be executed on the command line interface. There is no need to change profiles or PVA acceleration.
- B. The standard FastL4 profile should have PVA acceleration disabled. Then the packet capture tcpdump -ni vlan301 should be executed on the command line interface.
- C. A new FastL4 profile should be created and applied to the virtual server with PVA acceleration disabled. Then the packet capture tcpdump -ni vlan301 should be executed on the command line interface.
- D. The LTM device is under light load. The traffic should be mirrored to a dedicated sniffing device. On the sniffing device, the packet capture tcpdump -ni vlan301 should be executed.
Answer: C
NEW QUESTION 81
An LTM Specialist has configured a virtual server for www.example.com, load balancing connections to a pool of application servers that provide a shopping cart application. Cookie persistence is enabled on the virtual server. Users are able to connect to the application, but the user's shopping cart fails to update. A traffic capture shows the following:
Request:
GET /cart/updatecart.php HTTP/1.1
Host: www.example.com
Connection: keep-alive
Cache-Control: max-age=0
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-EncodinG. gzip,deflate,sdch Accept-LanguagE. en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 CookiE. BIGipServerwebstore_pool=353636524.20480.0000 Response:
HTTP/1.1 200 OK
DatE. Wed, 24 Oct 2012 18:00:13 GMT
Server: Apache/2.2.22 (Ubuntu)
X-Powered-By: PHP/5.3.10-1ubuntu3.1
Set-CookiE. cartID=647A5EA6657828C69DB8188981CB5; path=/; domain=wb01.example.com Keep-AlivE. timeout=5, max=100 Connection: Keep-Alive Content-TypE. text/html No changes can be made to the application.
What should the LTM Specialist do to resolve the problem?
- A. Use an iRule to rewrite the cartID cookie domain.
- B. Create a cookie persistence profile with "match across services" enabled.
- C. Enable source address persistence as a fallback persistence method.
- D. Create a universal persistence profile on the cartID cookie.
Answer: A
NEW QUESTION 82
-- Exhibit --
-- 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 is seeing a client source IP of 168.210.232.5 in the tcpdump. However, the client source IP is actually 10.123.17.12.
Why does the IP address of 10.123.17.12 fail to appear in the tcpdump?
- A. The individual's data stream is being routed to the LTM device by a means other than the default route.
- B. Network Address Translation (NAT) has occurred in the path between the client and the LTM device.
- C. The Secure Network Address Translation (SNAT) pool on the virtual server is activated.
- D. The LTM device performed NAT on the individual's IP address.
Answer: B
Explanation:
Explanation
NEW QUESTION 83
-- Exhibit -
-- 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?
- A. Incorrect syntax in send string. 'HTTP/1.1' should be 'HTTP1.1'.
- B. Incorrect syntax in send string. 'Connection: Close' should be 'Connection: Open'.
- C. The GET request Host header field requires a host name.
- D. The /test_page.html does NOT exist on the web server and should be added.
Answer: D
NEW QUESTION 84
In preparation for a maintenance task, an LTM Specialist performs a "Force to Standby" on LTM device Unit 1. LTM device Unit 2 becomes active as expected. The maintenance task requires the reboot of Unit 1. Shortly after the reboot is complete, the LTM Specialist discovers that Unit 1 has become active and Unit 2 has returned to standby.
What would cause this behavior?
- A. A traffic group is configured with Auto Failback, and Unit 1 is the default device.
- B. Unit 1 is set with the redundancy state preference of active in devices groups.
- C. Unit 1 is set with the redundancy state preference of active in high availability.
- D. A device group is configured with Auto Failback, and Unit 1 is the default device.
Answer: A
NEW QUESTION 85
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. The LTM device has reached the maximum number of allowed attempts to send the data segment to the affected TCP connection.
- B. The LTM device reset the connection because no pool members are available.
- C. A virtual server connection limit has been reached.
- D. The host at the other end terminated the TCP connection.
Answer: D
NEW QUESTION 86
-- Exhibit- -- Exhibit -
Refer to the exhibit.
A failover has just occured on BIG-IP1. BIG-IP2 is now active and manages traffic as expected. Both Bigip's are set with a gateway failsafe to check the reachability of the main border router. Switches have performed as expected.
Where should the LTM Specialist check for potential issues?
- A. Network Interface 1.1 of BIG-IP 1
- B. Network Interface 2.1 of BIG-IP 1
- C. Network Interface 2.2 of BIG-IP 2
- D. Network Interface 2.1 of BIG-IP 2
- E. Network Interface 2.2 of BIG-IP 1
- F. Network Interface 1.1 of BIG-IP 2
Answer: B
NEW QUESTION 87
A web application requires knowledge of the client's true IP address for logging and analysis purposes. Instances of the application that can decode X-Forwarded-For HTTP headers reside in pool_a, while pool_b instances assume the source IP is the true address of the client.
Which iRule provides the proper functionality?
- A. when HTTP_REQUEST { if {[HTTP::header exists X-Forwarded-For]}{ pool pool_a } else { pool pool_b } }
- B. when HTTP_OPEN { if {[HTTP::header exists X-Forwarded-For]}{ pool pool_a } else { pool pool_b } }
- C. when HTTP_RESPONSE {
if {[HTTP::header exists X-Forwarded-For]}{
pool pool_a
} else {
pool pool_b
} } - D. when HTTP_DATA {
if {[HTTP::header exists X-Forwarded-For]}{
pool pool_a
} else {
pool pool_b
}
}
Answer: A
NEW QUESTION 88
-- 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?
- 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. The metric "Page Load Time" needs to be enabled to ensure that the correct information is collected.
- D. User Agents needs to be enabled to ensure the correct information is collected to trigger the alert.
Answer: A
NEW QUESTION 89
An LTM device is load balancing telnet and ssh applications in a client/server environment experiencing significant packet delay.
Which setting in the TCP profile should reduce the amount of packet delay?
- A. disable Bandwidth Delay
- B. disable Nagle's Algorithm
- C. enable Proxy Maximum Segment
- D. increase Maximum Segment Retransmissions
Answer: B
NEW QUESTION 90
Which two items can be logged by the Application Visibility Reporting analytics profile? (Choose two.)
- A. User Agent
- B. HTTP version
- C. Per Virtual Server CPU Utilization
- D. HTTP Response Codes
Answer: A,D
NEW QUESTION 91
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?
- 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.
Answer: B
NEW QUESTION 92
Which command line interface command will check if the BIG-IP platform contains a packet velocity ASIC (PVA)?
- A. tmsh show /sys hardware pva status
- B. bigpipe platform show | grep -i pva
- C. tmsh show /ltm hardware | grep -i pva
- D. tmsh show /sys hardware | grep -i pva
Answer: D
NEW QUESTION 93
Given LTM device ltm log:
Sep 26 20:51:08 local/lb-d-1 notice promptstatusd[3695]: 01460006:5: semaphore mcpd.running(1) held
Sep 26 20:51:08 local/lb-d-1 notice promptstatusd[3695]: 01460006:5:
Sep 26 20:51:08 local/lb-d-1 warning promptstatusd[3695]: 01460005:4: mcpd.running(1) held,
wait for mcpd
Sep 26 20:51:08 local/lb-d-1 info sod[3925]: 010c0009:6: Lost connection to mcpd - reestablishing.
Sep 26 20:51:08 local/lb-d-1 err bcm56xxd[3847]: 012c0004:3: Lost connection with MCP:
16908291 ... Exiting bsx_connect.cpp(174)
Sep 26 20:51:08 local/lb-d-1 info bcm56xxd[3847]: 012c0012:6: MCP Exit Status
Sep 26 20:51:08 local/lb-d-1 info bcm56xxd[3847]: 012c0012:6: Info: LACP stats (time
now:1348717868) : no traffic
Sep 26 20:51:08 local/lb-d-1 info bcm56xxd[3847]: 012c0014:6: Exiting...
Sep 26 20:51:08 local/lb-d-1 err lind[3842]: 013c0004:3: IO error on recv from mcpd - connection
lost
Sep 26 20:51:08 local/lb-d-1 notice bigd[3837]: 01060110:5: Lost connection to mcpd with error
16908291, will reinit connection.
Sep 26 20:51:08 local/lb-d-1 err statsd[3857]: 011b0004:3: Initial subscription for system
configuration failed with error ''
Sep 26 20:51:08 local/lb-d-1 err statsd[3857]: 011b0001:3: Connection to mcpd failed with error
'011b0004:3: Initial subscription for system configuration failed with error '''
Sep 26 20:51:08 local/lb-d-1 err csyncd[3851]: 013b0004:3: IO error on recv from mcpd -
connection lost
.............skipping more logs.....
Sep 26 20:51:30 local/lb-d-1 notice sod[3925]: 01140030:5: HA proc_running bcm56xxd is now
responding.
Sep 26 20:51:34 local/lb-d-1 notice sod[3925]: 01140030:5: HA proc_running mcpd is now
responding.
Sep 26 20:51:34 local/lb-d-1 notice sod[3925]: 010c0018:5: Standby
Which daemon failed?
- A. promptstatusd
- B. bcm56xxd
- C. sod
- D. lind
- E. mcpd
Answer: E
NEW QUESTION 94
......
Who should take the F5 301b exam
The F5 BIG-IP Local Traffic Manager (LTM) Specialist: Maintain & Troubleshoot 301b Exam certification is an internationally-recognized validation that identifies persons who earn it as possessing skilled as F5 Certified Technology Specialists. If a candidate wants significant improvement in career growth needs enhanced knowledge, skills, and talents. The F5 BIG-IP Local Traffic Manager (LTM) Specialist: Maintain & Troubleshoot 301b Exam certification provide proof of this advanced knowledge and skill. If a candidate passed the prerequisite of this exam that is F5 LTM Specialist: Architect, Setup, and Deploy 301a Exam and has knowledge of associated technologies and skills that are required to pass F5 BIG-IP Local Traffic Manager (LTM) Specialist: Maintain & Troubleshoot 301b Exam then he should take this exam.
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