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400-251 Dumps

  • [April 2018] Free Download Lead2pass Cisco 400-251 VCE And PDF Dumps 359q

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    QUESTION 21
    Refer to the exhibit which two statement about the given IPV6 ZBF configuration are true? (Choose two)

    211

    A.    It provides backward compability with legacy IPv6 inspection
    B.    It inspect TCP, UDP,ICMP and FTP traffic from Z1 to Z2.
    C.    It inspect TCP, UDP,ICMP and FTP traffic from Z2 to Z1.
    D.    It inspect TCP,UDP,ICMP and FTP traffic in both direction between z1 and z2.
    E.    It passes TCP, UDP,ICMP and FTP traffic from z1 to z2.
    F.    It provide backward compatibility with legacy IPv4 inseption.

    Answer: AB

    QUESTION 22
    In which class of applications security threads does HTTP header manipulation reside?

    A.    Session management
    B.    Parameter manipulation
    C.    Software tampering
    D.    Exception managements

    Answer: B
    Explanation:
    http://www.cgisecurity.com/owasp/html/ch11s04.html
    Session management doesn’t have anything to do with HTTP header

    QUESTION 23
    What is the most commonly used technology to establish an encrypted HTTP connection?

    A.    the HTTP/1.1 Upgrade header
    B.    the HTTP/1.0 Upgrade header
    C.    Secure Hypertext Transfer Protocol
    D.    HTTPS

    Answer: D

    QUESTION 24
    What functionality is provided by DNSSEC?

    A.    origin authentication of DNS data
    B.    data confidentiality of DNS queries and answers
    C.    access restriction of DNS zone transfers
    D.    storage of the certificate records in a DNS zone file

    Answer: A

    QUESTION 25
    What are the two mechanism that are used to authenticate OSPFv3 packets?(Choose two)

    A.    MD5
    B.    ESP
    C.    PLAIN TEXT
    D.    AH
    E.    SHA

    Answer: BD

    QUESTION 26
    You have been asked to configure a Cisco ASA appliance in multiple mode with these settings:

    (A) You need two customer contexts, named contextA and contextB
    (B) Allocate interfaces G0/0 and G0/1 to contextA
    (C) Allocate interfaces G0/0 and G0/2 to contextB
    (D) The physical interface name for G0/1 within contextA should be “inside”.
    (E) All other context interfaces must be viewable via their physical interface names.

    If the admin context is already defined and all interfaces are enabled, which command set will complete this configuration?

    A.    context contextA
    config-url disk0:/contextA.cfg
    allocate-interface GigabitEthernet0/0 visible
    allocate-interface GigabitEthernet0/1 inside
    context contextB
    config-url disk0:/contextB.cfg
    allocate-interface GigabitEthernet0/0 visible
    allocate-interface GigabitEthernet0/2 visible
    B.    context contexta
    config-url disk0:/contextA.cfg
    allocate-interface GigabitEthernet0/0 visible
    allocate-interface GigabitEthernet0/1 inside
    context contextb
    config-url disk0:/contextB.cfg
    allocate-interface GigabitEthernet0/0 visible
    allocate-interface GigabitEthernet0/2 visible
    C.    context contextA
    config-url disk0:/contextA.cfg
    allocate-interface GigabitEthernet0/0 invisible
    allocate-interface GigabitEthernet0/1 inside
    context contextB
    config-url disk0:/contextB.cfg
    allocate-interface GigabitEthernet0/0 invisible
    allocate-interface GigabitEthernet0/2 invisible
    D.    context contextA
    config-url disk0:/contextA.cfg
    allocate-interface GigabitEthernet0/0
    allocate-interface GigabitEthernet0/1 inside
    context contextB
    config-url disk0:/contextB.cfg
    allocate-interface GigabitEthernet0/0
    allocate-interface GigabitEthernet0/2
    E.    context contextA
    config-url disk0:/contextA.cfg
    allocate-interface GigabitEthernet0/0 visible
    allocate-interface GigabitEthernet0/1 inside
    context contextB
    config-url disk0:/contextB.cfg
    allocate-interface GigabitEthernet0/1 visible
    allocate-interface GigabitEthernet0/2 visible

    Answer: A

    QUESTION 27
    Which statement about the cisco anyconnect web security module is true ?

    A.    It is VPN client software that works over the SSl protocol.
    B.    It is an endpoint component that is used with smart tunnel in a clientless SSL VPN.
    C.    It operates as an NAC agent when it is configured with the Anyconnect VPN client.
    D.    It is deployed on endpoints to route HTTP traffic to SCANsafe

    Answer: D

    QUESTION 28
    Which two statements about the SeND protocol are true? (Choose two)

    A.    It uses IPsec as a baseline mechanism
    B.    It supports an autoconfiguration mechanism
    C.    It must be enabled before you can configure IPv6 addresses
    D.    It supports numerous custom neighbor discovery messages
    E.    It counters neighbor discovery threats
    F.    It logs IPv6-related threats to an external log server

    Answer: BE

    Explanation:
    http://www.cisco.com/c/en/us/td/docs/security/ips/6-1/configuration/guide/cli/cliguide/cli_signature_engines.html#wp1141808

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    QUESTION 1
    According to OWASP guidelines, what is the recommended method to prevent cross-site request forgery?

    A.    Allow only POST requests.
    B.    Mark all cookies as HTTP only.
    C.    Use per-session challenge tokens in links within your web application.
    D.    Always use the “secure” attribute for cookies.
    E.    Require strong passwords. (more…)

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    QUESTION 426
    Refer to the exhibit. Which two statements about a device with this configuration are true? (Choose two)

     

    A.    When a peer re-establishes a previous connection to the device.
    CTS retains all existing SGT mapping entries for 3 minutes
    B.    If a peer reconnects to the device within 120 seconds of terminating a CTS-SXP connection, the reconciliation timer starts
    C.    If a peer re-establishes a connection to the device before the hold-down tier expires, the device retains the SGT mapping entries it learned during the previous connection for an additional 3 minutes
    D.    It sets the internal hold-down timer of the device to 3 minutes
    E.    When a peer establishes a new connection to the device, CTS retains all existing SGT mapping entries for 3 minutes
    F.    If a peer reconnects to the device within 180 seconds of terminating a CTS-SXP connection, the reconciliation timer starts

    (more…)

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    QUESTION 376
    Which two statements about 802.1X components are true? (Choose two.)

    A.    The access layer switch is the policy enforcement point.
    B.    The certificates that are used in the client-server authentication process are stored on the access switch
    C.    The RADIUS server is the policy enforcement point.
    D.    The RADIUS server is the policy information point
    E.    The RADIUS server is the policy decision point.
    F.    An LDAP server can serve as the policy enforcement point.

    (more…)

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    QUESTION 351
    Which effect of the ip nhrp map multicast dynamic command is true?

    A.    It configures a hub router to automatically add spoke routers to the multicast replication list of the hub
    B.    It enables a GRE tunnel to operate without the IPsec peer or crypto ACLs.
    C.    it enables a GRE tunnel to dynamically update the routing tables on the devices at each end of the tunnel
    D.    It configures a hub router to reflect the routes it learns from a spoke back to other spokes through the same interface

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    QUESTION 326
    What is the first step in performing a risk assessment?

    A.    Identifying critical services and network vulnerabilrties and determining the potential impact of their compromise or failure.
    B.    Investigating reports of data theft or security breaches and assigning responsibility.
    C.    Terminating any employee believed to be responsible for compromising security.
    D.    Evaluating the effectiveness and appropriateness of the organization’s current risk-managemept activities.
    E.     Establishing a security team to perform forensic examinations of previous known attacks.

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    QUESTION 301
    Which of the following two statements apply to EAP-FAST? (Choose two.)

    A.    EAP-FAST is useful when a strong password policy cannot be enforced and an 802.1X EAP type that does not require digital certificates can be deployed.
    B.    EAP-FAST was developed only for Cisco devices and is not compliant with 802.1X and 802.11i.
    C.    EAP-FAST provides protection from authentication forging and packet forgery (replay attack).
    D.    EAP-FAST is a client/client security architecture.

    (more…)

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    QUESTION 276
    Refer to the exhibit. Which effect of this command is true?

     

    A.    The current public key of the router is deleted from the cache when the router reboots, and the router generates a new one.
    B.    The CA revokes the public key certificate of the router.
    C.    The public key of the remote peer is deleted from the router cache.
    D.    The router immediately deletes its current public key from the cache and generates a new one.
    E.    The router sends a request to the CA to delete the router certificate from its configuration.

    (more…)

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    QUESTION 251
    Which three Cisco attributes for LDAP authorization are supported on the ASA? (Choose three)

    A.    L2TP-Encryption
    B.    Web-VPN-ACL-Filters
    C.    IPsec-Client-Firewall-Filter-Name
    D.    Authenticated-User-Idle-Timeout
    E.    IPsec-Default-Domain
    F.    Authorization-Type

    (more…)

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    QUESTION 226
    What are the two technologies that support AFT? (Choose two)

    A.    NAT-PT
    B.    SNAT
    C.    NAT64
    D.    DNAT
    E.    NAT-PMP
    F.    NAT-6to4

    (more…)

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    QUESTION 201
    Which two statements about DTLS are true?(Choose two)

    A.    It uses two simultaneous IPSec tunnels to carry traffic.
    B.    If DPD is enabled, DTLS can fall back to a TLS connection.
    C.    Because it requires two tunnels, it may experience more latency issues than SSL connections.
    D.    If DTLS is disabled on an interface, then SSL VPN connections must use SSL/TLS tunnels.
    E.    It is disabled by default if you enable SSL VPN on the interface.

    (more…)

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    QUESTION 176
    What are the three response types for SCEP enrollment requests? (Choose three.)

    A.    PKCS#7
    B.    Reject
    C.     Pending
    D.    PKCS#10
    E.    Success
    F.    Renewal

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    QUESTION 151
    Which two statements about the SHA-1 algorithm are true? (Choose two)

    A.    The SHA-1 algorithm is considered secure because it always produces a unique hash for the same message.
    B.    The SHA-1 algorithm takes input message of any length and produces 160-bit hash output.
    C.    The SHA-1 algorithm is considered secure because it is possible to find a message from its hash.
    D.    The purpose of the SHA-1 algorithm is to provide data confidentiality.
    E.    The purpose of the SHA-1 algorithm is to provide data authenticity.

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    QUESTION 126
    Which Three statement about cisco IPS manager express are true? (Choose three)

    A.    It provides a customizable view of events statistics.
    B.    It Can provision policies based on risk rating.
    C.    It Can provision policies based on signatures.
    D.    It Can provision policies based on IP addresses and ports.
    E.    It uses vulnerability-focused signature to protect against zero-day attacks.
    F.    It supports up to 10 sensors.

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    QUESTION 101
    Refer to the exhibit. Which effect of this configuration is true?

     

    A.    Host_1 learns about R2 and only and prefers R2 as its default router
    B.    Host_1 selects R2 as its default router and load balances between R2 and R3
    C.    Host_1 learns about R2 and R3 only and prefers R3 as its default router
    D.    Host_1 learns about R1,R2 and R3 and load balances between them
    E.    Host_1 learns about R1, R2 and R3 and prefers R2 as its default router

    (more…)

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    QUESTION 76
    Refer to the exhibit. R1 and R2 are connected across and ASA with MD5 authentication.
    Which statement about eBGP peering between the routers could be true?

     

    A.    eBGP peering will fail because ASA is transit lacks BGP support.
    B.    eBGP peering will be successful.
    C.    eBGP peering will fail because the two routers must be directly connected to allow peering.
    D.    eBGP peering will fail because of the TCP random sequence number feature.

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    QUESTION 51
    What are feature that can stop man-in-the-middle attacks? (Choose two)

    A.    ARP sniffing on specific ports
    B.    ARP spoofing
    C.    Dynamic ARP inspection
    D.    DHCP snooping
    E.    destination MAC ACLs (more…)

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    QUESTION 26
    You have been asked to configure a Cisco ASA appliance in multiple mode with these settings:

    (A) You need two customer contexts, named contextA and contextB
    (B) Allocate interfaces G0/0 and G0/1 to contextA
    (C) Allocate interfaces G0/0 and G0/2 to contextB
    (D) The physical interface name for G0/1 within contextA should be “inside”.
    (E) All other context interfaces must be viewable via their physical interface names.

    If the admin context is already defined and all interfaces are enabled, which command set will complete this configuration?

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    QUESTION 1
    According to OWASP guidelines, what is the recommended method to prevent cross-site request forgery?

    A.    Allow only POST requests.
    B.    Mark all cookies as HTTP only.
    C.    Use per-session challenge tokens in links within your web application.
    D.    Always use the “secure” attribute for cookies.
    E.    Require strong passwords.

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