[2017-Feb-New]400-251 CCIE PDF and VCE Exam Dumps Provided for Free Download By Braindump2go[Question1-Question13]
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2.|2017 NEW 400-251 Written Exam Questions & Answers:
http://www.braindump2go.com/400-251.html QUESTION 1
Drag and drop the step in the Cisco ASA packet processing flow on the left into the correct order of operations on the right.
Answer:
 QUESTION 2
What is the effect of the following command on Cisco IOS router?
ip dns spoofing 1.1.1.1 A. The router will respond to the DNS query with its highest loopback address configured
B. The router will respond to the DNS query with 1.1.1.1 if the query id for its own hostname
C. The router will respond to the DNS query with the IP address of its incoming interface for any hostname query
D. The router will respond to the DNS query with the IP address of its incoming interface for its own hostname Answer: D QUESTION 3
You have configured a DMVPN hub and spoke a follows (assume the IPsec profile "dmvpnprofile" is configured correctly):
With this configuration, you notice that the IKE and IPsec SAs come up between the spoke and the hub, but NHRP registration fails. Registration will continue to fail until you do which of these? A. Configure the ipnhrp cache non-authoritative command on the hub's tunnel interface
B. Modify the NHRP hold times to match on the hub and spoke
C. Modify the NHRP network IDs to match on the hub and spoke
D. Modify the tunnel keys to match on the hub and spoke Answer: D QUESTION 5
Which two options are unicast address types for IPv6 addressing? (Choose two) A. Established
B. Static
C. Global
D. Dynamic
E. Link-local Answer: CE QUESTION 6
Refer to the exhibit. Which two effects of this configuration are true? (Choose two)
 A. The BGP neighbor session tears down after R1 receives 100 prefixes from the neighbor 1.1.1.1
B. The BGP neighbor session between R1 and R2 re-establishes after 50 minutes
C. A warning message is displayed on R2 after it receives 50 prefixes
D. A warning message is displayed on R2 after it receives 100 prefixes from neighbor 1.1.1.1
E. The BGP neighbor session tears down after R1 receives 200 prefixes from neighbor 2.2.2.2
F. The BGP neighbor session between R1 and R2 re-establishes after 100 minutes Answer: DE QUESTION 7
From the list below, which one is the major benefit of AMP Threat GRID? A. AMP Threat Grid collects file information from customer servers and run tests on them to see if they are infected with viruses
B. AMP Threat Grid learns ONLY from data you pass on your network and not from anything else to monitor for suspicious behavior. This makes the system much faster and efficient
C. AMP Threat Grid combines Static, and Dynamic Malware analysis with threat intelligence into one combined solution
D. AMP Threat Grid analyzes suspicious behavior in your network against exactly 400 behavioral indicators Answer: C QUESTION 8
Which two characteristics of DTLS are true? (Choose two) A. It includes a congestion control mechanism
B. It supports long data transfers and connections data transfers
C. It completes key negotiation and bulk data transfer over a single channel
D. It is used mostly by applications that use application layer object-security protocols
E. It includes a retransmission method because it uses an unreliable datagram transport
F. It cannot be used if NAT exists along the path Answer: AE QUESTION 9
Which two of the following ICMP types and code should be allowed in a firewall to enable traceroute? (Choose two) A. Destination Unreachable-protocol Unreachable
B. Destination Unreachable-port Unreachable
C. Time Exceeded-Time to Live exceeded in Transit
D. Redirect-Redirect Datagram for the Host
E. Time Exceeded-Fragment Reassembly Time Exceeded
F. Redirect-Redirect Datagram for the Type of service and Host Answer: BC QUESTION 10
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 Answer: BDE QUESTION 11
Which two statements about global ACLs are true? (Choose two) A. They support an implicit deny
B. They are applied globally instead of being replicated on each interface
C. They override individual interface access rules
D. They require an explicit deny
E. They can filer different packet types than extended ACLs
F. They require class-map configuration Answer: AB QUESTION 12
When TCP intercept is enabled in its default mode, how does it react to a SYN request? A. It intercepts the SYN before it reaches the server and responds with a SYN-ACK
B. It drops the connection
C. It monitors the attempted connection and drops it if it fails to establish within 30 seconds
D. It allows the connection without inspection
E. It monitors the sequence of SYN, SYN-ACK, and ACK messages until the connection is fully established Answer: E QUESTION 13
Which two statements about IPsec in a NAT-enabled environment are true? (Choose two) A. The hashes of each peer's IP address and port number are compared to determine whether NAT-T is required
B. NAT-T is not supported when IPsec Phase 1 is set to Aggressive Mode
C. The first two messages of IPsec Phase 2 are used to determine whether the remote host supports NAT-T
D. IPsec packets are encapsulated in UDP 500 or UDP 10000 packets
E. To prevent translations from expiring, NAT keepalive messages that include a payload are sent between the peers Answer: AD
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