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Which one of the aaa accounting commands can be used to enable logging of both the start and stoprecords for user terminal sessions on the router？（）

A.aaa accounting connection start-stop tacacs+
B.aaa accounting exec start-stop tacacs+
C.aaa accounting system start-stop tacacs+
D.aaa accounting network start-stop tacacs+

2.單項選擇題Which key method is used to detect and prevent attacks by use of IDS and/or IPS technologies？（）

A.Signature-based detection
B.Anomaly-based detection
C.Honey pot detection
D.Policy-based detection

4.單項選擇題Refer to the exhibit. Which statement is correct based on the show login command output shown？（）

A.When the router goes into quiet mode， any host is permitted to access the router via Telnet，SSH， and HTTP，since the quiet-mode access list has not been configured.
B.The login block-for command is configured to block login hosts for 93 seconds.
C.All logins from any sources are blocked for another 193 seconds.
D.Three or more login requests have failed within the last 100 seconds.

5.單項選擇題When configuring role-based CLI on a Cisco router，which action will be taken first ？（）

A.Create a parser view called "root view."
B.Log in to the router as the root user.
C.Enable the root view on the router.
D.Enable role-based CLI globally on the router using the privileged EXEC mode Cisco IOS command.

6.單項選擇題How do you define the authentication method that will be used with AAA？（）

A.With the method aaa command
B.With the method command
C.With a method list
D.With a method statement

7.多項選擇題Which three are distinctions between asymmetric and symmetric algorithms？ （）

A.Only symmetric algorithms have a key exchange technology built in
B.Asymmetric algorithms are used quite often as key exchange protocols for symmetricalgorithms
C.Only asymmetric algorithms have a key exchange technology built in
D.Asymmetric algorithms are based on more complex mathematical computations

9.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

10.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

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