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2018 Aug Cisco Official New Released 400-251
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CCIE Security Written Exam (v5.0)
Question No: 221 – (Topic 2)
On Which encryption algorithm is CCMP based?
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IDEA
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BLOWFISH
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RCS
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3DES
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AES
Answer: E
Question No: 222 – (Topic 2)
What are two feature that can be used to drop incoming traffic with spoofed bogon address? (Choose two)
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Unicast RPF
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ingress ACLs
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flexible ACLs
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egress ACLs
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reflexive ACLs
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Source Specific Multicast
Answer: A,B
Explanation: 859)During a DoS attacks all of the data is lost from a user’s laptop and the user must now rebuild the system Which
tool can the user use to extract the outlook PST file from the Microsoft server database?
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Eseutil. exe
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NTabackup.cex
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Exmerge.exe
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Ost2st.exe
Answer: C
Question No: 223 – (Topic 2)
What are the two mechanism that are used to authenticate OSPFv3 packets?(Choose two)
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MD5
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ESP
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PLAIN TEXT
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AH
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SHA
Answer: B,D
Question No: 224 – (Topic 2)
Which two statement about the multicast addresses query message are true?(choose two)
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They are solicited when a node initialized the multicast process.
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They are used to discover the multicast group to which listeners on a link are subscribed
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They are used to discover whether a specified multicast address has listeners
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They are send unsolicited when a node initializes the multicast process
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They are usually sent only by a single router on a link
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They are sent when a node discover a multicast group
Answer: B,C
Question No: 225 – (Topic 2)
Refer to the exhibit. What is the effect of the given configuration ?
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It reset and logs FTP connection to all sites except cisco.com and hp.com.
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FTP connections are unaffected.
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It resets FTP connection to all sites except cisco.com and hp.com.
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It resets and logs FTP connection to cisco.com and hp.com only.
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It resets FPT connection to cisco.com and hp.com only
Answer: A
Question No: 226 – (Topic 2)
Which two statements about the anti-replay feature are true? (Choose two)
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By default, the sender uses a single 1024-packet sliding window
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By default, the receiver uses a single 64-packet sliding window
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The sender assigns two unique sequence numbers to each clear-text packet
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The sender assigns two unique sequence numbers to each encrypted packet
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the receiver performs a hash of each packet in the window to detect replays
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The replay error counter is incremented only when a packet is dropped
Answer: B,D
Question No: 227 – (Topic 2)
When attempting to use basic Http authentication to authenticate a client,which type of HTTP massage should the server use?
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HTTP 200 with a WWW-authenticate header.
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HTTP 401 with a WWW-authenticate header.
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Http 302 with an authenticate header.
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HTTP 407.
Answer: B
Question No: 228 – (Topic 2)
From what type of server can you to transfer files to ASA’s internal memory ?
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SSH
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SFTP
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Netlogon
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SMB
Answer: D
Question No: 229 – (Topic 2)
Why is the IPv6 type 0 routing header vulnerable to attack?
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It allows the receiver of a packet to control its flow.
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It allows the sender to generate multiple NDP requests for each packet.
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It allows the sender of a packet to control its flow.
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It allows the sender to generate multiple ARP requests for each packet.
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It allows the receiver of a packet to modify the source IP address.
Answer: C
Question No: 230 – (Topic 2)
Which of the following statement is true about the ARP spoofing attack?
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Attacker sends the ARP request with the MAC address and IP address of the legitimate resource in the network.
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Attacker of ends the ARP request with MAC address and IP address of its own.
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ARP spoofing does not facilitate man in-the-middle attack for the attacker.
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Attacker sends the ARP request with its own MAC address and IP address of legitimate resource in the
network.
Answer: D
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