單項選擇題In a brute-force attack, what percentage of the keyspace must an attacker generally search through until heor she finds the key that decrypts the data?()

A.Roughly 50 percent
B.Roughly 66 percent  ActualTests.com
C.Roughly 75 percent
D.Roughly 10 percent


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1.單項選擇題

On the basis of the show policy-map type inspect zone-pair session command output provided in theexhibit.What can be determined about this Cisco IOS zone based firewall policy?()




A.Stateful packet inspection will be applied only to HTTP packets that also match ACL 110
B.This is an inbound policy(applied to traffic sourced from the less secured zone destined to the moresecured zone)
C.This is an outbound policy(applied to traffic sourced from the more secured zone destined to the lesssecured zone)
D.All packets will be dropped since the class-default traffic class is matching all traffic

3.單項選擇題When configuring SSH, which is the Cisco minimum recommended modulus value?()

A.2048 bits
B.1024 bits
C.256 bits
D.512 bits

4.單項選擇題A standard access control list has been configured on a router and applied to interface Serial 0 in anoutbound direction. No ACL is applied to Interface Serial 1 on the same router. What will happen whentraffic being filtered by the access list does not match the configured ACL statements for Serial 0?()

A.The traffic is dropped
B.The resulting action is determined by the destination IP address
C.The source IP address is checked,and,if a match is not found, traffic is routed out interface Serial 1
D.The resulting action is determined by the destination IP address and port number

5.單項選擇題For the following options, which feature is the foundation of Cisco Self-Defending Network technology?()

A.secure network platform
B.secure connectivity
C.threat control and containment
D.policy management

6.單項選擇題Regarding constructing a good encryption algorithm, what does creating an avalanche effect indicate?()

A.Altering the key length causes the ciphertext to be completely different
B.Changing only a few bits of a ciphertext message causes the plain text to be completely different
C.Altering the key length causes the plain text to be completely different
D.Changing only a few bits of a plain-text message causes the ciphertext to be completely different

7.單項選擇題In an IEEE 802.1x deployment,between which two devices EAPOL messages typically are sent?()

A.Between the supplicant and the authenticator
B.Between the authenticator and the authentication server
C.Between the supplicant and the authentication server
D.Between the RADIUS server and the authenticator

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