單項(xiàng)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(xiàng)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

2.單項(xiàng)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+

3.單項(xiàng)選擇題As a network engineer at Certpaper.com, you are responsible for Certpaper network. Which will benecessarily taken into consideration when implementing Syslogging in your network?()

A.Enable the highest level of Syslogging available to ensure you log all possible event messages
B.Use SSH to access your Syslog information
C.Log all messages to the system buffer so that they can be displayed when accessing the router
D.Syncronize clocks on the network with a protocol such as Network Time Protocol

4.單項(xiàng)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.

6.單項(xiàng)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

7.單項(xiàng)選擇題

Please choose the correct description about Cisco Self-Defending Network characteristics.()

A.INTEGRATED - P4S2,COLLABORATIVE - P4S1ADAPTIVE - P4S3
B.INTEGRATED - P4S1,COLLABORATIVE - P4S2ADAPTIVE - P4S3
C.INTEGRATED - P4S3,COLLABORATIVE - P4S2ADAPTIVE - P4S1
D.INTEGRATED - P4S2,COLLABORATIVE - P4S3ADAPTIVE - P4S1

8.單項(xiàng)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

9.單項(xiàng)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

10.單項(xiàng)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

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