CCNA Security Chapter 5 Exam

Questão 1 de 23

1

What information must an IPS track in order to detect attacks matching a composite signature?

Selecione uma das seguintes:

the total number of packets in the attack
the attacking period used by the attacker
the network bandwidth consumed by all packets
the state of packets related to the attack

Explicação

Questão 2 de 23

1

What is a disadvantage of a pattern-based detection mechanism?

Selecione uma das seguintes:

The normal network traffic pattern must be profiled first
It cannot detect unknown attacks
It is difficult to deploy in a large network
Its configuration is complex

Explicação

Questão 3 de 23

1

What is the purpose in configuring an IOS IPS crypto key when enabling IOS IPS on a Cisco router?

Selecione uma das seguintes:

to secure the IOS image in flash
to enable Cisco Configuration Professional to be launched securely
to encrypt the master signature file
to verify the digital signature for the master signature file

Explicação

Questão 4 de 23

1

Refer to the exhibit. What is the result of issuing the Cisco IOS IPS commands on router R1?

Selecione uma das seguintes:

All traffic that is permitted by the ACL is subject to inspection by the IPS
A named ACL determines the traffic to be inspected
All traffic that is denied by the ACL is subject to inspection by the IPS
A numbered ACL is applied to S0/0/0 in the outbound directio

Explicação

Questão 5 de 23

1

Which two benefits does the IPS version 5.x signature format provide over the version 4.x signature format? (Choose two.)

Selecione uma ou mais das seguintes:

support for IPX and AppleTalk protocols
addition of signature micro engines
support for comma-delimited data import
support for encrypted signature parameters
addition of a signature risk rating

Explicação

Questão 6 de 23

1

Which type of IPS signature detection is used to distract and confuse attackers?

Selecione uma das seguintes:

honeypot-based detection
policy-based detection
pattern-based detection
anomaly-based detection

Explicação

Questão 7 de 23

1

Which statement is true about an atomic alert that is generated by an IPS?

Selecione uma das seguintes:

It is an alert that is used only when a logging attack has begun
It is a single alert sent for multiple occurrences of the same signature
It is an alert that is generated every time a specific signature has been found
It is both a normal alarm and a summary alarm being sent simultaneously at set intervals

Explicação

Questão 8 de 23

1

A system analyst is configuring and tuning a recently deployed IPS appliance. By examining the IPS alarm log, the analyst notices that the IPS does not generate alarms for a few known attack packets. Which term describes the lack of alarms by the IPS?

Selecione uma das seguintes:

true negative
false positive
false negative
true positive

Explicação

Questão 9 de 23

1

A security specialist configures an IPS so that it will generate an alert when an attack is first detected. Alerts for the subsequent detection of the same attack are suppressed for a pre-defined period of time. Another alert will be generated at the end of the period indicating the number of the attack detected. Which IPS alert monitoring mechanism is configured?

Selecione uma das seguintes:

composite alert
atomic alert
correlation alert
summary alert

Explicação

Questão 10 de 23

1

In configuring a Cisco router to prepare for IPS and VPN features, a network administrator opens the file realm-cisco.pub.key.txt, and copies and pastes the contents to the router at the global configuration prompt. What is the result after this configuration step?

Selecione uma das seguintes:

The router is authenticated with the Cisco secure IPS resource web server
A pair of public/secret keys is created for IPsec VPN operation
A crypto key is created for IOS IPS to verify the master signature file
A pair of public/secret keys is created for the router to serve as an SSH server

Explicação

Questão 11 de 23

1

Refer to the exhibit. Based on the configuration, which traffic will be examined by the IPS that is configured on router R1?

Selecione uma das seguintes:

traffic that is destined to LAN 1 and LAN 2
return traffic from the web server
traffic that is initiated from LAN 1 and LAN 2
no traffic will be inspected
http traffic that is initiated from LAN 1

Explicação

Questão 12 de 23

1

Refer to the exhibit. Based on the IPS configuration provided, which conclusion can be drawn?

Selecione uma das seguintes:

The signatures in all categories will be compiled into memory and used by the IPS
The signatures in all categories will be retired and not be used by the IPS
Only the signatures in the ios_ips basic category will be compiled into memory and used by the IPS
The signatures in the ios_ips basic category will be retired and the remaining signatures will be compiled into memory and used by the IPS

Explicação

Questão 13 de 23

1

A network administrator is configuring an IOS IPS with the command
R1(config)# ip ips signature-definition
Which configuration task can be achieved with this command?

Selecione uma das seguintes:

Retire or unretire the ios_ips basic signature category
Retire or unretire an individual signature
Retire or unretire the all signature category
Retire or unretire the all atomic signatures category

Explicação

Questão 14 de 23

1

What are two disadvantages of using an IDS? (Choose two.)

Selecione uma ou mais das seguintes:

The IDS analyzes actual forwarded packets
The IDS does not stop malicious traffic
The IDS has no impact on traffic
The IDS works offline using copies of network traffic
The IDS requires other devices to respond to attacks

Explicação

Questão 15 de 23

1

What are two shared characteristics of the IDS and the IPS? (Choose two.)

Selecione uma ou mais das seguintes:

Both use signatures to detect malicious traffic
Both analyze copies of network traffic
Both have minimal impact on network performance
Both rely on an additional network device to respond to malicious traffic
Both are deployed as sensors

Explicação

Questão 16 de 23

1

Refer to the exhibit. A network administrator enters the command on a Cisco IOS IPS router. What is the effect?

Selecione uma das seguintes:

Alert messages are sent in syslog format
Alert messages are sent in trace file format
Alert messages are sent in Security Device Event Exchange (SDEE) format
Alert messages are sent in event log format

Explicação

Questão 17 de 23

1

A network administrator suspects the default setting of the ip ips notify sdee command has caused performance degradation on the Cisco IOS IPS router. The network administrator enters the ip sdee events 50 command in an attempt to remedy the performance issues. What is the immediate effect of this command?

Selecione uma das seguintes:

All events that were stored in the original buffer are saved, while a new buffer is created to store new events
All events that were stored in the previous buffer are lost
The newest 50 events from the original buffer are saved and all others are deleted
The oldest 50 events of the original buffer are deleted

Explicação

Questão 18 de 23

1

True or False?
A Cisco IDS does not affect the flow of traffic when it operates in promiscuous mode

Selecione uma das opções:

VERDADEIRO
FALSO

Explicação

Questão 19 de 23

1

What is a required condition to enable IPS activity reporting using the SDEE format?

Selecione uma das seguintes:

Create an IOS IPS configuration directory in flash
Enable an HTTP or HTTPS service on the router
Configure the signature category
Issue the ip ips notify log command

Explicação

Questão 20 de 23

1

Refer to the exhibit. Which statement best describes how incoming traffic on serial 0/0 is handled?

Selecione uma das seguintes:

Traffic that is coming from any source other than 172.31.235.0/24 will be scanned and reported
Traffic not matching ACL 100 will be dropped
Traffic not matching ACL 100 will be scanned and reported
Traffic that is sourced from 172.31.235.0/24 will be sent directly to its destination without being scanned or reported
Traffic matching ACL 100 will be scanned and reported
Traffic that is sourced from 172.31.235.0/24 will be scanned and reported

Explicação

Questão 21 de 23

1

What is a disadvantage of network-based IPS as compared to host-based IPS?

Selecione uma das seguintes:

Network-based IPS is less cost-effective
Network-based IPS should not be used with multiple operating systems
Network-based IPS cannot examine encrypted traffic
Network-based IPS does not detect lower level network events

Explicação

Questão 22 de 23

1

n IPS sensor has detected the string confidential across multiple packets in a TCP session. Which type of signature trigger and signature type does this describe?

Selecione uma das seguintes:

Trigger: Policy-based detection
Type: Atomic signature
Trigger: Policy-based detection
Type: Composite signature
Trigger: Anomaly-based detection
Type: Atomic signature
Trigger: Anomaly-based detection
Type: Composite signature
Trigger: Pattern-based detection
Type: Atomic signatur
Trigger: Pattern-based detection
Type: Composite signature

Explicação

Questão 23 de 23

1

What are two drawbacks to using HIPS? (Choose two.)

Selecione uma ou mais das seguintes:

With HIPS, the success or failure of an attack cannot be readily determined
With HIPS, the network administrator must verify support for all the different operating systems used in the network.
HIPS has difficulty constructing an accurate network picture or coordinating events that occur across the entire network
If the network traffic stream is encrypted, HIPS is unable to access unencrypted forms of the traffic
HIPS installations are vulnerable to fragmentation attacks or variable TTL attacks

	Criado por d94829 d94829 mais de 6 anos atrás

CCNA Security v2.0 Chapter 5 Exam

CCNA Security Chapter 5 Exam

CCNA Security Chapter 5 Exam

Questão 1 de 23

What information must an IPS track in order to detect attacks matching a composite signature?

Selecione uma das seguintes:

Explicação

Questão 2 de 23

What is a disadvantage of a pattern-based detection mechanism?

Selecione uma das seguintes:

Explicação

Questão 3 de 23

What is the purpose in configuring an IOS IPS crypto key when enabling IOS IPS on a Cisco router?

Selecione uma das seguintes:

Explicação

Questão 4 de 23

Refer to the exhibit. What is the result of issuing the Cisco IOS IPS commands on router R1?

Selecione uma das seguintes:

Explicação

Questão 5 de 23

Which two benefits does the IPS version 5.x signature format provide over the version 4.x signature format? (Choose two.)

Selecione uma ou mais das seguintes:

Explicação

Questão 6 de 23

Which type of IPS signature detection is used to distract and confuse attackers?

Selecione uma das seguintes:

Explicação

Questão 7 de 23

Which statement is true about an atomic alert that is generated by an IPS?

Selecione uma das seguintes:

Explicação

Questão 8 de 23

A system analyst is configuring and tuning a recently deployed IPS appliance. By examining the IPS alarm log, the analyst notices that the IPS does not generate alarms for a few known attack packets. Which term describes the lack of alarms by the IPS?

Selecione uma das seguintes:

Explicação

Questão 9 de 23

Selecione uma das seguintes:

Explicação

Questão 10 de 23

In configuring a Cisco router to prepare for IPS and VPN features, a network administrator opens the file realm-cisco.pub.key.txt, and copies and pastes the contents to the router at the global configuration prompt. What is the result after this configuration step?

Selecione uma das seguintes:

Explicação

Questão 11 de 23

Refer to the exhibit. Based on the configuration, which traffic will be examined by the IPS that is configured on router R1?

Selecione uma das seguintes:

Explicação

Questão 12 de 23

Refer to the exhibit. Based on the IPS configuration provided, which conclusion can be drawn?

Selecione uma das seguintes:

Explicação

Questão 13 de 23

A network administrator is configuring an IOS IPS with the command R1(config)# ip ips signature-definition Which configuration task can be achieved with this command?

Selecione uma das seguintes:

Explicação

Questão 14 de 23

What are two disadvantages of using an IDS? (Choose two.)

Selecione uma ou mais das seguintes:

Explicação

Questão 15 de 23

What are two shared characteristics of the IDS and the IPS? (Choose two.)

Selecione uma ou mais das seguintes:

Explicação

Questão 16 de 23

Refer to the exhibit. A network administrator enters the command on a Cisco IOS IPS router. What is the effect?

Selecione uma das seguintes:

Explicação

Questão 17 de 23

Selecione uma das seguintes:

Explicação

Questão 18 de 23

True or False? A Cisco IDS does not affect the flow of traffic when it operates in promiscuous mode

Selecione uma das opções:

Explicação

Questão 19 de 23

What is a required condition to enable IPS activity reporting using the SDEE format?

Selecione uma das seguintes:

Explicação

Questão 20 de 23

Refer to the exhibit. Which statement best describes how incoming traffic on serial 0/0 is handled?

Selecione uma das seguintes:

A network administrator is configuring an IOS IPS with the command
R1(config)# ip ips signature-definition
Which configuration task can be achieved with this command?

True or False?
A Cisco IDS does not affect the flow of traffic when it operates in promiscuous mode