F5 BIG-IP V9.4 LTM Essentials
Questions, Answers, Braindumps (F50-521)
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QUESTION NO: 1
Where is the load-balancing mode specified?
A. Within the pool definition
B. Within the node definition
C. Within the virtual server definition
D. Within the pool member definition
QUESTION NO: 2
Assume a virtual server has a ServerSSL profile. What
SSL certificates are required on the BIGIP?
A. No SSL certificates are required on the BIG-IP.
B. The BIG-IP's SSL certificates must only exist.
C. The BIG-IP's SSL certificates must be issued from
a certificate authority.
D. The BIG-IP's SSL certificates must be created within
the company hosting the BIG-IPs.
QUESTION NO: 3
Assume the bigd daemon fails on the active system. Which
three are possible results? (Choose three.)
A. The active system will restart the bigd daemon and
continue in active mode.
B. The active system will restart the tmm daemon and
continue in active mode.
C. The active system will reboot and the standby system
will go into active mode.
D. The active system will fail-over and the standby
system will go into active mode.
E. The active system will continue in active mode but
gather member and node state information from the standby
QUESTION NO: 4
When upgrading a BIG-IP redundant pair, what happens
when one system has been updated but the other has not?
A. Synching should not be performed.
B. The first system to be updated will assume the Active
C. This is not possible since both systems are updated
D. The older system will issue SNMP traps indicating
a communication error with the partner.
QUESTION NO: 5
Assume a client's traffic is being processed only by
a NAT; no SNAT or virtual server processing takes place.
Also assume that the NAT definition specifies a NAT
address and an origin address while all other settings
are left at their defaults. If a client were to initiate
traffic to the NAT address, what changes, if any, would
take place when the BIG-IP processes such packets?
A. The source address would not change, but the destination
address would be translated to the origin address.
B. The destination address would not change, but the
source address would be translated to the origin address.
C. The source address would not change, but the destination
address would be translated to the NAT's address.
D. The destination address would not change, but the
source address would be translated to the NAT's address.
QUESTION NO: 6
Which statement is true concerning SSL termination?
A. A virtual server that has both ClientSSL and ServerSSL
profiles can still support cookie persistence.
B. Decrypting traffic at the BIG-IP allows the use of
iRules for traffic management, but increases the load
on the pool member.
C. When any virtual server uses a ClientSSL profile,
all SSL traffic sent to the BIG-IP is decrypted before
it is forwarded to servers.
D. If a virtual server has both a ClientSSL and ServerSSL
profile, the pool members have less SSL processing than
if the virtual server had only a ClientSSL profile
QUESTION NO: 7
A BIG-IP has a virtual server at 220.127.116.11:80 with
SNAT automap configured. This BIG-IP also has a SNAT
at 18.104.22.168 set for a source address range of 22.214.171.124/255.255.255.0.
All other settings are at their default states. If a
client with the IP address 126.96.36.199 sends a request
to the virtual server, what is the source IP address
when the associated packet is sent to the pool member?
C. Floating self IP address on VLAN where the packet
leaves the system
D. Floating self IP address on VLAN where the packet
arrives on the system
QUESTION NO: 8
Assume a BIG-IP has no NATs or SNATs configured. Which
two scenarios are possible when client traffic arrives
on a BIG-IP that is NOT destined to a self-IP? (Choose
A. If the destination of the traffic does not match
a virtual server, the traffic will be discarded.
B. If the destination of the traffic does not match
a virtual server, the traffic will be forwarded based
on routing tables.
C. If the destination of the traffic matches a virtual
server, the traffic will be processed per the virtual
D. If the destination of the traffic matches a virtual
server, the traffic will be forwarded, but it cannot
be load-balanced since no SNAT has been configured.
QUESTION NO: 9
If a client's browser does not accept cookies, what
occurs when the client connects to a virtual server
using cookie persistence?
A. The connection request is not processed.
B. The connection request is sent to an apology server.
C. The connection request is load-balanced to an available
D. The connection request is refused and the client
is sent a "server not available" message.
QUESTION NO: 10
Assuming other fail-over settings are at their default
state, what would occur if the fail-over cable were
to be disconnected for five seconds and then reconnected?
A. As long as network communication is not lost, no
change will occur.
B. Nothing. Fail-over due to loss of voltage will not
occur if the voltage is lost for less than ten seconds.
C. When the cable is disconnected, both systems will
become active. When the voltage is restored, unit two
will revert to standby mode.
D. When the cable is disconnected, both systems will
become active. When the voltage is restored, both systems
will maintain active mode.
QUESTION NO: 11
Assuming there are open connections through an active
system's virtual servers and a fail-over occurs, by
default, what happens to the connections?
A. All open connections are lost.
B. All open connections are maintained.
C. When persistence mirroring is enabled, open connections
are maintained even if a fail-over occurs.
D. Long-lived connections such as Telnet and FTP are
maintained, but short-lived connections such as HTTP
E. All open connections are lost, but new connections
are initiated by the newly active BIG-IP, resulting
in minimal client downtime.
QUESTION NO: 12
Which VLANs must be enabled for a SNAT to perform as
desired (translating only desired packets)?
A. The SNAT must be enabled for all VLANs.
B. The SNAT must be enabled for the VLANs where desired
packets leave the BIG-IP.
C. The SNAT must be enabled for the VLANs where desired
packets arrive on the BIG-IP.
D. The SNAT must be enabled for the VLANs where desired
packets arrive and leave the BIG-IP.
QUESTION NO: 13
Which three methods can be used for initial access to
a BIG-IP system? (Choose three.)
A. CLI access to the serial console port
B. SSH access to the management port
C. SSH access to any of the switch ports
D. HTTP access to the management port
E. HTTP access to any of the switch ports
F. HTTPS access to the management port
G. HTTPS access to any of the switch ports
QUESTION NO: 14
When can a single virtual server be associated with
A. Never. Each virtual server has a maximum of one profile.
B. Often. Profiles work on different layers and combining
profiles is common.
C. Rarely. One combination, using both the TCP and HTTP
profile does occur, but it is the exception.
D. Unlimited. Profiles can work together in any combination
to ensure that all traffic types are supported in a
given virtual server.
QUESTION NO: 15
Which action will take place when a failover trigger
is detected by the active system?
A. The active device will take the action specified
for the failure.
B. The standby device also detects the failure and assumes
the active role.
C. The active device will wait for all connections to
terminate and then fail-over.
D. The standby device will begin processing virtual
servers that have failed, but the active device will
continue servicing the functional virtual servers.
QUESTION NO: 16
Which three properties can be assigned to nodes? (Choose
A. Ratio values
B. Priority values
C. Health monitors
D. Connection limits
E. Load-balancing mode