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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2.多項選擇題What are two characteristics of the SDM Security Audit wizard?()

A.displays a screen with Fix-it check boxes to let you choose which potential security-related configuration changes to implement
B.has two modes of operationinteractive and non-interactive
C.automatically enables Cisco IOS firewall and Cisco IOS IPS to secure the router
D.uses interactive dialogs and prompts to implement role-based CLI
E.requires users to first identify which router interfaces connect to the inside network and which connectto the outside network

5.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

8.單項選擇題Which statement is true about a Smurf attack?()

A.It sends ping requests in segments of an invalid size
B.It intercepts the third step in a TCP three-way handshake to hijack a session
C.It sends ping requests to a subnet, requesting that devices on that subnet send ping replies to a targetsystem
D.It uses Trojan horse applications to create a distributed collection of "zombie" computers, which can beused to launch a coordinated DDoS attack

9.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

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