Cisco CCIE Security Written Exam (v5.0) - 400-251 Exam Questions [2026]

QUESTION NO: 1
When Cisco Web Security Appliance (WSA) is configured for the first time, how is WSA GUI interface accessed?

A. https://$ManagementIP:443 B. https://$ManagementIP:8443 C. http://$ManagementIP:8080 D. http://$ManagementIP:8443 E. https://$ManagementIP:8080

Correct Answer: C

QUESTION NO: 2
Which statement correctly describes Botnet attack?

A. It is a form of a fragmentation attack to evade an intrusion prevention security device B. It is a form of a man-in-the-middle attack where the compromised machine is controlled remotely C. It is launched by a collection of noncompromised machines controllers by command and control system D. It is launched by a single machine controlled by command and control system E. It is a form a wireless attack where attacker installs an access point to create backdoor to a network F. It can be used to steal data

Correct Answer: F

QUESTION NO: 3
Refer to the exhibit.

R3 is the key server in a GETVPN VRF-Aware implementation. The group members for the site_a register with key server via interface address 10.1.20.3/24 in the management VRF "mgmt". The GROUP ID for the site_a is 100 to retrieve group policy and keys from the key server The traffic to be encrypted by the site_a group members is between 192.186.4.0/24 and 192.186.5.0/24. The preshared key used by the group members to authenticate with the key server is "cisco". It has been reported that group members cannot perform encryption for the traffic defined in the group policy of site_a. Which two possible issues are true? (Choose two.)

A. incorrect security-association time in the IPsec profile B. The registration interface is not part of management VRF "mgmt" C. The GDOI group has an incorrect local server address D. incorrect encryption traffic defined in the group policy E. incorrect password in the keyring configuration F. incorrect encryption in ISAKMP policy

Correct Answer: B,D

QUESTION NO: 4
Which statement is true for email processing pipeline in Cisco Email Security Appliance (ESA)?

A. VOF (Virus Outbreak Filters) scanning is done at very beginning of the work-queue part of email pipeline B. Content filters are used before Message filters in ESA pipeline C. Anti-Spam scanning is done before Anti-Virus scanning D. VOF (Virus Outbreak Filters) scanning is done before Graymail scanning

Correct Answer: C

QUESTION NO: 5
Which statement is correct about Cisco Web Security Appliance (WSA)?

A. WSA can not decrypt HTTPS traffic B. WSA policies can be configured using GUI interface only C. WSA can have only one routing table D. WSA does not offer out-of-bound Management capability

Correct Answer: B

QUESTION NO: 6
Which three HTTP methods are supported by a REST API? (Choose three)

A. COPY B. RETRIVE C. POST D. SET E. GET F. PUT

Correct Answer: C,E,F

QUESTION NO: 7
Which of the following statements about Cisco Trust Sec is incorrect?

A. A cisco Firewall can perform stateful packet inspection based on SGT rules B. Cisco TrustSec Uses the Security Group Tag (SGT) to enforce group access policies C. IKEv2 can be used to negotiate and inform IPsec about SGT capability D. SGT Exchange Protocol (SXP) is required for SGT propagation E. Cisco TrustSec enforcement points can be a router switch, or firewall

Correct Answer: B

QUESTION NO: 8
What one policy element is mandatory to create a Posture Requirement in ISE?

A. Posture Policy B. Posture Condition C. Authorization Profile D. Posture Remediation Action

Correct Answer: A