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Ace the F5 301b Exam: Ultimate Preparation Guide

Questions 51

An LTM device pair is configured for failover and connection mirroring. The LTM devices are configured with virtual servers for HTTP, HTTPS with SSL offload, and SSH. An event occurs that causes a failover. HTTP and SSH sessions active at the time of failover remain active, but HTTPS sessions are dropped.

What is the root cause of this problem?

Options:

A.

The SSL certificates on the LTM devices do NOT match.

B.

Connection mirroring is incompatible with clientssl profiles.

C.

SNAT automap was NOT enabled for the HTTPS virtual servers.

D.

Connection mirroring was NOT enabled for the HTTPS virtual servers.

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Questions 52

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 53

An LTM Specialist has a OneConnect profile and HTTP profile configured on a virtual server to load balance an HTTP application.

The following HTTP headers are seen in a network trace when a client connects to the virtual server:

Clientside:

GET / HTTP/1.1

Host: 192.168.136.100

User-Agent: Mozilla/5.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Accept-EncodinG. gzip, deflate

Connection: keep-alive

Serverside:

HTTP/1.1 200 OK

DatE. 5 Jun 1989 17:06:55 GMT

Server: Apache/2.2.14 (Ubuntu)

Vary: Accept-Encoding

Content-EncodinG. gzip

Content-LengtH. 3729

X-Cnection: close

Content-TypE. text/html

The LTM Specialist notices the OneConnect feature is working incorrectly.

Why is OneConnect functioning incorrectly?

Options:

A.

Client must support HTTP/1.0.

B.

Client must support HTTP keep-alive.

C.

Server must support HTTP/0.9.

D.

Server must support HTTP keep-alive.

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Questions 54

-- Exhibit –

301b Question 54

-- Exhibit --

Refer to the exhibit.

A layer 2 nPath routing configuration has been deployed. A packet capture contains a client connection packet with the following properties:

Source IP:

Destination IP:

At which two locations could the packet capture have been taken? (Choose two.)

Options:

A.

the network interface of web server

B.

the DMZ interface of the Internet firewall

C.

the internal interface of the Internet firewall

D.

the external VLAN interface of the LTM device

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Questions 55

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?

Options:

A.

SNAT Pool

B.

Pool Member

C.

Port Lockdown

D.

Virtual Server Port Translation

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Questions 56

A device group is made up of four members: LTM-A, LTM-B, LTM-C, and LTM-D. An LTM Specialist makes a configuration change on LTM-B. Later, a different LTM Specialist notices a "changes pending" message on all devices. When logged into LTM-D, the LTM Specialist attempts to config-sync to the device group. The sync operation fails.

Why is the LTM Specialist on LTM-D unable to synchronize the configuration to the group?

Options:

A.

The changes made on LTM-B are invalid.

B.

LTM-D has the lowest commit-id of the group.

C.

NTP is NOT configured on the devices in the group.

D.

LTM-B is the device eligible to initiate a config-sync.

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Questions 57

-- Exhibit –

301b Question 57

301b Question 57

-- Exhibit --

Refer to the exhibits.

An LTM Specialist uses the information in the logs to determine the cause of a failover event in a high-availability (HA) pair.

What caused the failover?

Options:

A.

The overdog process crashed.

B.

The system was administratively rebooted.

C.

The process bcm56xxd received SIGTERM from the watchdog process.

D.

The configuration reload request caused the config to reload and the device to failover.

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Questions 58

Users are experiencing low throughput when downloading large files over a high-speed WAN connection. Extensive packet loss was found to be an issue but CANNOT be eliminated.

Which two TCP profile settings should be modified to compensate for the packet loss in the network? (Choose two.)

Options:

A.

slow start

B.

proxy options

C.

proxy buffer low

D.

proxy buffer high

E.

Nagle's algorithm

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Questions 59

What do the following iRule commands do when they are used in the same iRule?

set hsl [HSL::open -proto UDP -pool syslog_server_pool]

HSL::send $hsl "<190> [HTTP::host] from [whereis [IP::client_addr] country continent state city zip] , IP: [IP::client_addr]"

Options:

A.

The commands set up a high-speed logging connection and then send the geographical database to the server.

B.

The commands set up a high-speed logging connection and then send the host header and client geographical detail to the connection.

C.

The commands set up a high-speed logging connection and then send the host header, HTTP payload, and client geographical detail to the connection.

D.

The commands set up a high-speed logging connection to the LTM device and then send the host header and client geographical detail to the connection.

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Questions 60

An LTM Specialist is setting up a monitor for an HTTP 1.1 server. The response to a GET / is:

HTTP/1.1 302 Moved Temporarily

Location: http://www.example.com/new/location.html

Which send string settings should the LTM Specialist use to force a proper response?

Options:

A.

GET / HTTP/1.0\r\nHost: host.domain.com\r\nConnection: Close\r\n\r\n

B.

GET /new/location.html HTTP/1.1\r\nHost: <a href="www.example.com\r\nConnection:">www.example.com\r\nConnection:</a> Close\r\n\r\n

C.

GET / HTTP/1.1\r\nHost: <a href="www.example.com/new/location.html\r\nConnection:">www.example.com/new/location.html\r\nConnection:</a> Close\r\n\r\n

D.

GET /new/location.html HTTP/1.1\r\nHost: host.domain.com/new/locations.html\r\nConnection: Close\r\n\r\n

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Exam Code: 301b
Exam Name: LTM Specialist: Maintain & Troubleshoot
Last Update: Jun 25, 2024
Questions: 209

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