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303 Real Exam Questions

BIG-IP ASM Specialist

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Question 1 Single choice

Refer to the exhibit.

Which step should an LTM Specialist take to utilize AVR?

  1. A

    provision AVR

  2. B

    reboot the device

  3. C

    install the AVR add-on

  4. D

    license the device for AVR

Show answer and explanation

Correct answer: A

Question 2 Single choice

A virtual server is using a TCP profile based on thetop-wan-optimized profile for a streaming application Users report videos are loading slowly.

Which setting should be modified in the TCP profile to optimize the application?

  1. A

    Disable Slow Start

  2. B

    Disable Selective ACKs

  3. C

    Disable Nagle's Algorithm

  4. D

    Disable Reset on Timeout

Show answer and explanation

Correct answer: A

Question 3 Single choice

The LTM device is configured to provide load balancing to a set of web servers that implement access control lists (ACL) based on the source IP address of the client. The ACL is at the network level and the web server is configured to send a TCP reset back to the client if it is NOT permitted to connect.

The virtual server is configured with the default OneConnect profile.

The ACL is defined on the web server as:

Permit: 192.168.136.0/24

Deny: 192.168.116.0/24

The packet capture is taken of two individual client flows to a virtual server with IP address
192.168.136.100.

Client A - Src IP 192.168.136.1 - Virtual Server 192.168.136.100:

Clientside:

09:35:11.073623 IP 192.168.136.1.55684 > 192.168.136.100.80: S 869998901:869998901(0) win 8192
<mss 1460,nop,wscale 2,nop,nop,sackOK>
09:35:11.073931 IP 192.168.136.100.80 > 192.168.136.1.55684: S 2273668949:2273668949(0) ack
869998902 win 4380 <mss 1460,nop,wscale 0,sackOK,eol>

09:35:11.074928 IP 192.168.136.1.55684 > 192.168.136.100.80: . ack 1 win 16425

09:35:11.080936 IP 192.168.136.1.55684 > 192.168.136.100.80: P 1:299(298) ack 1 win 16425

09:35:11.081029 IP 192.168.136.100.80 > 192.168.136.1.55684: . ack 299 win 4678

Serverside:

09:35:11.081022 IP 192.168.136.1.55684 > 192.168.116.128.80: S 685865802:685865802(0) win 4380
<mss 1460,nop,wscale 0,sackOK,eol>

09:35:11.081928 IP 192.168.116.128.80 > 192.168.136.1.55684: S 4193259095:4193259095(0) ack
685865803 win 5840 <mss 1460,nop,nop,sackOK,nop,wscale 6>

09:35:11.081943 IP 192.168.136.1.55684 > 192.168.116.128.80: . ack 1 win 4380

09:35:11.081955 IP 192.168.136.1.55684 > 192.168.116.128.80: P 1:299(298) ack 1 win
09:35:11.083765 IP 192.168.116.128.80 > 192.168.136.1.55684: . ack 299 win 108

Client B - Src IP 192.168.116.1 - Virtual Server 192.168.136.100:

Clientside:

09:36:11.244040 IP 192.168.116.1.55769 > 192.168.136.100.80: S 3320618938:3320618938(0) win 8192
<mss 1460,nop,wscale 2,nop,nop,sackOK>

09:36:11.244152 IP 192.168.136.100.80 > 192.168.116.1.55769: S 3878120666:3878120666(0) ack
3320618939 win 4380 <mss 1460,nop,wscale 0,sackOK,eol>

09:36:11.244839 IP 192.168.116.1.55769 > 192.168.136.100.80: . ack 1 win 16425

09:36:11.245830 IP 192.168.116.1.55769 > 192.168.136.100.80: P 1:299(298) ack 1 win 16425

09:36:11.245922 IP 192.168.136.100.80 > 192.168.116.1.55769: . ack 299 win 4678 Serverside:

09:36:11.245940 IP 192.168.136.1.55684 > 192.168.116.128.80: P 599:897(298) ack 4525 win 8904

09:36:11.247847 IP 192.168.116.128.80 > 192.168.136.1.55684: P 4525:5001(476) ack 897 win 142

Why was the second client flow permitted by the web server?

  1. A

    A global SNAT is defined.

  2. B

    SNAT automap was enabled on the virtual server.

  3. C

    The idle TCP session from the first client was re-used.

  4. D

    A source address persistence profile is assigned to the virtual server.

Show answer and explanation

Correct answer: C

Question 4 Single choice

Some users who connect to a busy Virtual Server have connections reset by the BIG-IP system. Pool member resources are NOT a factor in this behavior.

What is a possible cause for this behavior?

  1. A

    The Connection Rate Limit is set too high

  2. B

    The server SSL Profile has NOT been reconfigured.

  3. C

    The Connection Limit is set too low.

  4. D

    The Rewrite Profile has NOT been configured.

Show answer and explanation

Correct answer: C

Question 5 Single choice

Refer to the exhibit.

Users are able to access the application when connecting to the virtual server but are unsuccessful when connecting directly to the application servers. The LTM Specialist wants to allow direct access to the application servers.

Why are users unable to connect directly to the application servers?

  1. A

    The router does NOT have a route to the server subnet.

  2. B

    The web server does NOT have a correct default gateway.

  3. C

    The LTM device does NOT have a SNAT on the External VLAN.

  4. D

    The LTM device does NOT have an IP Forwarding virtual server on the Internal VLAN.

  5. E

    The LTM device does NOT have an IP Forwarding virtual server on the External VLAN.

Show answer and explanation

Correct answer: B

Question 6 Single choice

An LTM Specialist has set up a custom SNMP alert.

Which command line tool should the LTM Specialist use to test the alert?

  1. A

    logger

  2. B

    logtest

  3. C

    testlog

  4. D

    snmptest

Show answer and explanation

Correct answer: A

Question 7 Single choice

Refer to the exhibit.

Why is the virtual server responsive to incoming connections?

  1. A

    The pool member is disabled

  2. B

    The pool member monitor failed

  3. C

    The node is disabled.

  4. D

    The node monitor failed

Show answer and explanation

Correct answer: B

Question 8 Single choice

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?

  1. A

    red or offline

  2. B

    blue or unchecked

  3. C

    green or available

  4. D

    unchanged until bigd is restarted

Show answer and explanation

Correct answer: D

Question 9 Single choice

An application is making heavy use of a large, high-quality JPEG image file. An LTM Specialist needs to enhance page load times without increasing server load.

Which profile should be applied to the virtual server to perform this task?

  1. A

    Response Adapt

  2. B

    OneConnect

  3. C

    FastHTTP

  4. D

    Web Acceleration

Show answer and explanation

Correct answer: D

Question 10 Single choice

Refer to the exhibit.

Users are able to access the application when connecting directly to the web server but are unsuccessful when connecting to the virtual server.

What is the cause of the application access problem?

  1. A

    The virtual server has SNAT disabled.

  2. B

    The client has no route to the web server.

  3. C

    The virtual server has address translation disabled.

  4. D

    The web server is NOT responding on the correct port.

  5. E

    The virtual server is NOT configured to listen on port 80.

Show answer and explanation

Correct answer: C