640-553 Exam
1. As a network engineer at Cisco.com, you are responsible for Cisco network. Which will be necessarily taken into consideration when implementing Syslogging in your network?
A. Log all messages to the system buffer so that they can be displayed when accessing the router.
B. Use SSH to access your Syslog information.
C. Enable the highest level of Syslogging available to ensure you log all possible event messages.
D. Syncronize clocks on the network with a protocol such as Network Time Protocol.
Answer: D
2. Which classes does the U.S. government place classified data into? (Choose three.)
A. SBU
B. Confidential
C. Secret
D. Top-secret
Answer: BCD
3. You are a network technician at Cisco.com. Which description is correct when you have generated RSA keys on your Cisco router to prepare for secure device management?
A. All vty ports are automatically enabled for SSH to provide secure management.
B. The SSH protocol is automatically enabled.
C. You must then zeroize the keys to reset secure shell before configuring other parameters.
D. You must then specify the general-purpose key size used for authentication with the crypto key generate rsa general-keys modulus command.
Answer: B
4. Which method is of gaining access to a system that bypasses normal security measures?
A. Creating a back door
B. Starting a Smurf attack
C. Conducting social engineering
D. Launching a DoS attack
Answer: A
5. As a candidate for CCNA examination, when you are familiar with the basic commands, if you input the command “enable secret level 5 password” in the global mode , what does it indicate?
A. Set the enable secret command to privilege level 5.
B. The enable secret password is hashed using SHA.
C. The enable secret password is hashed using MD5.
D. The enable secret password is encrypted using Cisco proprietary level 5 encryption.
E. The enable secret password is for accessing exec privilege level 5.
Answer: E
6. Which statement is true about a Smurf attack?
A. It sends ping requests to a subnet, requesting that devices on that subnet send ping replies to a target system.
B. It intercepts the third step in a TCP three-way handshake to hijack a session.
C. It uses Trojan horse applications to create a distributed collection of “zombie” computers, which can be used to launch a coordinated DDoS attack.
D. It sends ping requests in segments of an invalid size.
Answer: A

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