Exit demo 400-251 CCIE Security Written PDF format · free preview

Cisco 400-251 - Questions & Answers

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Question 1
Multiple choice

A server with IP address 209.165.202.150 is protected behind the inside interface of a Cisco ASA and the Internet on the outside interface. User on the Internet need to access the server ay any time, but the firewall administrator does not want to apply NAT to the address of the server because it is currently a public address.

Which three of the following commands can be used to accomplish this? (Choose three)

A.

static (outside, inside) 209.165.202.150 209.165.202.150 netmask 255.255.255.255

B.

nat (inside) 1 209.165.202.150 255.255.255.255

C.

static (inside, outside) 209.165.202.150 209.165.202.150 netmask 255.255.255.255

D.

no nat-control

E.

access-list no-nat permit ip host 209.165.202.150 any nat (inside) 0 access-list no-nat

F.

nat (inside) 0 209.165.202.150 255.255.255.255

Question 2
Single choice

Which statement about the Cisco AMP Virtual Private Cloud Appliance is true for deployments in air-gap mode?

A.

The amp-sync tool syncs the threat-intelligence repository on the appliance directly with the AMP public cloud.

B.

The appliance can perform disposition lookup against either the Protect DB or the AMP public cloud.

C.

The appliance can perform disposition lookups against the Protect DB without an Internet connection.

D.

The appliance evaluates files against the threat intelligence and disposition information residing on the Update Host.

E.

The Update Host automatically downloads updates and deploys them to the Protect DB on a daily basis.

Question 3
Multiple choice

What are the most common methods that security auditors use to access an organizations security processes? (Choose two)

A.

physical observation

B.

social engineering attempts

C.

penetration testing

D.

policy assessment

E.

document review

F.

interviews

Question 4
Multiple choice

Which two statements about Cisco AMP for Web Security are true? (Choose two)

A.

It can prevent malicious data exfiltration by blocking critical files from exiting through the Web gateway.

B.

It can perform reputation-based evaluation and blocking by uploading the fingerprint of incoming files to

a cloud-based threat intelligence network.

C.

It can detect and block malware and other anomalous traffic before it passes through the Web gateway.

D.

It can perform file analysis by sandboxing known malware and comparing unknown files to a local repository of the threats.

E.

It can identify anomalous traffic passing through the Web gateway by comparing it to an established of expected activity.

F.

It continues monitoring files after they pass the Web gateway.

Question 5
Multiple choice

Which three statements about WCCP are true? (Choose three)

A.

If a specific capability is missing from the Capabilities Info Component, the router is assumed to support the default capability.

B.

The web cache transmits its capabilities as soon as it receives a receive ID from a router.

C.

The minimum WCCP-Fast Timers message interval is 500 ms.

D.

The assignment method supports GRE encapsulation for sending traffic.

E.

If the packet return method is missing from a packet return method advertisement, the web cache uses the Layer 2 rewrite method.

F.

The router must receive a valid receive ID before it negotiates capabilities.

Question 6
Multiple choice

What are two features that helps to mitigate man-in-the-middle attacks? (Choose two)

A.

DHCP snooping

B.

ARP spoofing

C.

destination MAC ACLs

D.

dynamic ARP inspection

E.

ARP sniffing on specific ports

Question 7
Multiple choice

Refer to the exhibit.

Which two effects of this configuration are true? (Choose two)

A.

The switch periodically sends an EAP-Identity-Request to the endpoint supplicant.

B.

The device allows multiple authenticated sessions for a single MAC address in the voice domain.

C.

If the TACACS+ server is unreachable, the switch places hosts on critical ports in VLAN 50.

D.

If the authentication priority is changed, the order in which authentication is performed also changes.

E.

If multiple hosts have authenticated to the same port, each can be in their own assigned VLAN.

F.

The port attempts 802.1x authentication first, and then falls back to MAC authentication bypass.

Question 8
Multiple choice

Which two statements about 6to4 tunneling are true? (Choose two)

A.

It provides a /128 address block.

B.

It supports static and BGPV4 routing.

C.

It provides a /48 address block.

D.

It supports managed NAT along the path of the tunnel.

E.

The prefix address of the tunnel is determined by the IPv6 configuration of the interface.

F.

It supports multihoming.

Question 9
Multiple choice

Which three statements about RLDP are true? (Choose three)

A.

It detects rogue access points that are connected to the wired network.

B.

It can detect rogue APs that use WPA encryption.

C.

It can detect rogue APs operating only on 5 GHz.

D.

It can detect rogue APs that use WEP encryption.

E.

The AP is unable to serve clients while the RLDP process is active.

F.

Active Rogue Containment can be initiated manually against rogue devices detected on the wired network.

Question 10
Multiple choice

What are three features that are enabled by generating Change of Authorization (CoA) requests in a push model? (Choose three)

A.

session reauthentication

B.

session identification

C.

host reauthentication

D.

MAC identification

E.

session termination

F.

host termination

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