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pass4line
Date: 2009-10-29 10:03 Author: pass4line Click: 23
Cisco 642-825 latest peactice exam answers
1. Which two statements are true about broadband cable (HFC) systems? (Choose two.)
A. Cable modems only operate at Layer 1 of the OSI model.
B. Cable modems operate at Layers 1 and 2 of the OSI model.
C. Cable modems operate at Layers 1, 2, and 3 of the OSI model.
D. A function of the cable modem termination system (CMTS) is to convert the modulated signal from the cable modem into a digital signal.
E. A function of the cable modem termination system is to convert the digital data stream from the end user host into a modulated RF signal for transmission onto the cable system.
Answer: BD
2. Which form of DSL technology is typically used as a replacement for T1 lines?
A. VDSL
B. HDSL
C. ADSL
D. SDSL
E. G.SHDSL
F. IDSL
Answer: B
3. Which two Network Time Protocol (NTP) statements are true? (Choose two.)
A. A stratum 0 time server is required for NTP operation.
B. NTP is enabled on all interfaces by default, and all interfaces receive NTP packets.
C. NTP operates on IP networks using User Datagram Protocol (UDP) port 123.
D. The ntp server global configuration is used to configure the NTP master clock to which other peers synchronize themselves.
E. The show ntp status command displays detailed association information of all NTP peers.
F. Whenever possible, configure NTP version 5 because it automatically provides authentication and encryption services.
Answer: BC
4. What are the two main features of Cisco IOS Firewall? (Choose two.)
A. TACACS+
B. AAA
C. Cisco Secure Access Control Server
D. Intrusion Prevention System
E. Authentication Proxy
Answer: DE
5. Which two statements describe the functions and operations of IDS and IPS systems? (Choose two.)
A. A network administrator entering a wrong password would generate a true-negative alarm.
B. A false positive alarm is generated when an IDS/IPS signature is correctly identified.
C. An IDS is significantly more advanced over IPS because of its ability to prevent network attacks.
D. Cisco IDS works inline and stops attacks before they enter the network.
E. Cisco IPS taps the network traffic and responds after an attack.
F. Profile-based intrusion detection is also known as "anomaly detection".
Answer: BF
6. Which IOS command would display IPS default values that may not be displayed using the show running-config command?
A. show ip ips configuration
B. show ip ips interface
C. show ip ips statistics
D. show ip ips session
Answer: A
