CCIE Security 400-251 PDF Questions

Each topic of designing, implementing, operating, and troubleshooting complex Cisco security technologies and solutions are well explained in these CCIE security written exam dumps of the 400-251 exam.

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Question No. 1

Which Cisco Firepower intrusion Event Impact level indicates the vulnerable to the attack, and requires the most immediate urgent.

Answer: E

Question No. 2

Which two statements about SPAN sessions are true? (Choose two.)

Answer: C, F

Question No. 3

Which statements is true regarding Dynamic ARP inspection (DAI)?

Answer: A

Question No. 4

Which three ESMTP extensions are supported by the Cisco ASA?Choose three

Answer: A, C, E

Question No. 5

Which definition of Machine Access Restriction is true?

Answer: D

Question No. 6

Refer to the exhibit.

What are two effects of the given configuration? (Choose two.)

Answer: A, E

Question No. 7

Refer to the exhibit.

Flexible NetFlow is failing to export IPv6 flow records from Router A to your flow


What action can you take to allow the IPv6 flow records to be sent to the collector?

Answer: C

Question No. 8

Which three authorization technologies does Cisco TrustSec support? (Choose three)

Answer: C, E, F

Question No. 9

Which two design options are best to reduce security concerns when adopting loT into an organization?

(Choose two.)

Answer: A, B

Question No. 10

Refer to the exhibit.

interface GigabitEthernet0/0

nameif outside

security-level 0

ip address


nterface GigabitEthernet0/1

nameif inside

security-level 100

ip address


nterface Management0/0


nameif mgmt

security-level 100

ip address



rypto ca trustpoint ccietrust

enrolment self

subject-name CN=ASA2


keypair cciekey

crl configure


sl trust-point ccietrust outside


ns domain-lookup inside

dns server-group DefaultDNS




roup-policy cciegroup internal

group-policy ciegroup attributes

banner value CCIE Written!

vpn-tunnel-protocol ssl-clientless


url-list value servers

filter value ccieacls


unnel-group ccietunnel type remote-access

tunnel-group ccietunnel general-attributes

default-group-policy cciegroup



enable outside

tunnel-group-list enable


rypto ikev2 remote-access trustpoint ccietrust

dynamic-access-policy-record DfltAccessPolicy

username ccie password mflDmeWbPK0tCAwZ encrypted

username ccie attributes

service-type remote-access

ASA2 is configured for the clientless SSL VPN connection with DNS server at that is reachable only from the Management0/0 interface. The incoming VPN session will be

received on outside interface with authentication credentials Username: ccie, Password: ccie. ASA 2 is

configured for the self-signed certificate with trustpoint “ccietrust” enabled for the outside interface. It has been reported that resources accessibility is timing out after the VPN connection establishment. What could be the reason?

Answer: F

Question No. 11

Which command is used to enable 802.1x authorization on an interface?

Answer: D

Question No. 12

Which statement about zone-based policy firewall implementation is true?

Answer: B

Question No. 13

Which two requirements are necessary to generate the self-signed certificate for SSL VPN deployment using AnyConnect with lOS router at the headend? (Choose two)

Answer: B, E

Question No. 14

Which ports is used by ISE pxGrid service for inter-node communication?

Answer: C

Question No. 15

Which statement regarding the routing functions of the Cisco ASA is true running software version 9.2?

Answer: A

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