Ace the F5 301b Exam: Ultimate Preparation Guide

A web developer has created a custom HTTP call to a backend application. The HTTP headers being sent by the HTTP call are:

GET / HTTP/1.1

User-Agent: MyCustomApp (v1.0)

Accept: text/html

Cache-Control: no-cache

Connection: keep-alive

CookiE. somecookie=1

The backend server is responding with the following:

HTTP/1.1 400 Bad Request

DatE. Wed, 20 Jul 2012 17:22:41 GMT

Connection: close

Why is the HTTP web server responding with a HTTP 400 Bad Request?

An LTM device is deployed in a one-armed topology. The virtual server, clients, and web servers are connected on the LTM device internal VLAN. A client tries to connect to the virtual server and is unable to establish a connection. A packet capture from the LTM device internal VLAN shows that the HTTP request is being forwarded to the web server.

From which two additional locations should protocol analyzer data be collected? (Choose two.)

An HTTP 1.1 application utilizes chunking.

Which header should be used to notify the client's browser that there are additional HTTP headers at the end of the message?

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Refer to the exhibit.

An LTM Specialist is upgrading the LTM devices.

Which device should be upgraded first?

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 should the LTM Specialist do to resolve this?

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?

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Refer to the exhibit.

Which step should an LTM Specialist take to utilize AVR?

-- 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 has the tcpdump extract. The client loses connection with the LTM device.

Where is the reset originating?

A stand-alone LTM device is to be paired with a second LTM device to create an active/standby pair. The current stand-alone LTM device is in production and has several VLANs with floating IP addresses configured. The appropriate device service clustering (DSC) configurations are in place on both LTM devices.

Which two non-specific DSC settings should the LTM Specialist configure on the second LTM device to ensure no errors are reported when attempting to synchronize for the first time? (Choose two.)

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Refer to the exhibits.

An LTM Specialist is troubleshooting an application configured on an LTM device on a one-armed configuration. The application is NOT working through the LTM device but does work when accessed directly via the application servers. 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. No Client or Server SSL profiles are associated. The LTM Specialist has collected two traffic captures to help determine the issue.

What is the problem with the configuration on the LTM device?