Cisco 640-553 Exam, Most Accurate Cisco 640-553 Dumps Are The Best Materials

Ralph K. Merritt CCNA Cisco August 8, 2016

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QUESTION 117
Regarding constructing a good encryption algorithm, what does creating an avalanche effect indicate?
A. Changing only a few bits of a plain-text message 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. Altering the key length causes the ciphertext to be completely different.

Correct Answer: A QUESTION 118
With the increasing development of network, various network attacks appear. Which statement best describes the relationships between the attack method and the result?

A. Ping Sweep – TIS1 and TIS3 Port Scan – TIS2, TIS4 and TIS5
B. Ping Sweep – TIS2 and TIS4 Port Scan – TIS1, TIS3 and TIS5
C. Ping Sweep – TIS1 and TIS5 Port Scan – TIS2, TIS3 and TIS4
D. Ping Sweep – TIS2 and TIS3 Port Scan – TIS1, TIS4 and TIS5

Correct Answer: B QUESTION 119
Stream ciphers run on which of the following?
A. Individual blocks, one at a time, with the transformations varying during the encryption
B. Individual digits, one at a time, with the transformations varying during the encryption
C. Fixed-length groups of digits called blocks
D. Fixed-length groups of bits called blocks

Correct Answer: B QUESTION 120
Which description is true about ECB mode?
A. ECB mode uses the same 64-bit key to serially encrypt each 56-bit plain-text block.
B. In ECB mode, each 56-bit plain-text block is exclusive ORed (XORed) bitwise with the previous ciphertext block.
C. ECB mode uses the same 56-bit key to serially encrypt each 64-bit plain-text block.
D. In ECB mode, each 64-bit plain-text block is exclusive ORed (XORed) bitwise with the previous ciphertext block.

Correct Answer: C QUESTION 121
In a brute-force attack, what percentage of the keyspace must an attacker generally search through until he or she finds the key that decrypts the data?
A. Roughly 66 percent
B. Roughly 10 percent
C. Roughly 75 percent
D. Roughly 50 percent

Correct Answer: D QUESTION 122
Which example is of a function intended for cryptographic hashing?
A. SHA-135
B. MD65
C. XR12
D. MD5

Correct Answer: D QUESTION 123
Which one of the following items may be added to a password stored in MD5 to make it more secure?
A. Rainbow table
B. Cryptotext
C. Ciphertext

D. Salt Correct Answer: D QUESTION 124
Drag three proper statements about the IPsec protocol on the above to the list on the below.

A. True
B. False

Correct Answer: A QUESTION 125
LAB

A. True
B. False

Correct Answer: A QUESTION 126
On the basis of the description of SSL-based VPN, place the correct descriptions in the proper locations.

A. True
B. False

Correct Answer: A QUESTION 127
Which three common examples are of AAA implementation on Cisco routers? Please place the correct descriptions in the proper locations.

A. True
B. False

Correct Answer: A QUESTION 128
Drag two characteristics of the SDM Security Audit wizard on the above to the list on the below.

A. True
B. False

Correct Answer: A
QUESTION 129
On the basis of the Cisco IOS Zone-Based Policy Firewall, by default, which three types of traffic are permitted by the router when some interfaces of the routers are assigned to a zone? Drag three proper characterizations on the above to the list on the below.

A. True
B. False

Correct Answer: A QUESTION 130
Match the description on the left with the IKE phases on the right.
A. True
B. False

Correct Answer: A QUESTION 131
The information of Cisco Router and Security Device Manager(SDM) is shown below: Within the “sdm-permit” policy map, what is the action assigned to the traffic class “class-default”?
A. inspect
B. pass
C. drop
D. police

Correct Answer: C QUESTION 132
Drag the result on the left to the corrosponding attack method on the right.

A. True
B. False

Correct Answer: A QUESTION 133
Which are the best practices for attack mitigation?

A. True
B. False

Correct Answer: A QUESTION 134

Next Gen University main campus is located in Santa Cruz. The University has recentley established various remote campuses offering e-learning services. The University is using Ipsec VPN connectivity between its main and remote campuses San Joe (SJ), Los Angeles (LA), Sacramento (SAC). As a recent addition to the IT/Networking team, you have been tasked to document the Ipsec VPN configuration to the remote campuses using the Cisco Router and SDM utility. Using the SDM output from VPN Tasks under the Configure tab, answer this question:
Which one of these statements is correct in regards to Next Gen University Ipsec tunnel between its Santa Cruz main campus and its SJ remote campus?
A. It is using Ipsec tunnel mode, AES encryption and SHA HMAC integrity Check.
B. It is using Ipsec transport mode, 3DES encryption and SHA integrity Check.
C. It is using Ipsec tunnel mode to protect the traffic between the 10.10.10.0/24 and the 10.2.54.0/24 subnet.
D. It is using digital certificate to authenticate between the Ipsec peers and DH group 2.
E. It is using pre-shared key to authenticate between the Ipsec peers and DH group 5.
F. The Santa Cruz main campus is the Easy VPN Server and the SJ remote campus is the Easy VPN Remote.
Correct Answer: C
QUESTION 135

Next Gen University main campus is located in Santa Cruz. The University has recentley established various remote campuses offering e-learning services. The University is using Ipsec VPN connectivity between its main and remote campuses San Joe (SJ), Los Angeles (LA), Sacramento (SAC). As a recent addition to the IT/Networking team, you have been tasked to document the Ipsec VPN configuration to the remote campuses using the Cisco Router and SDM utility. Using the SDM output from VPN Tasks under the Configure tab, answer this question:
Which one of these statements is correct in regards to Next Gen University Ipsec tunnel between its Santa Cruz main campus and its SAC remote campus?
A. The SAC remote campus remote router is using dynamic IP address; therefore, the Santa Cruz router is using a dynamic crypto map.
B. Dead Peer Detection (DPD) is need to monitor the Ipsec tunnel, so if there is no traffic between the two sites, the Ipsec tunnel will disconnect.
C. Tunnel mode is used; therefore, a GRE tunnel interface will be configured.
D. Only the ESP protocol is being used; AH is not bening used.
Correct Answer: D

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Written by Ralph K. Merritt

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