CCNA 640-802 Exam pdf dumps

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Cisco Certified Network Associate 640-802
Exam Number/Code : 640-802
Exam Name : Cisco Certified Network Associate
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Free 640-802 Demo Download
Questions and Answers : 323Q&As
Update Time : 2013-10-8
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640-802 CCNA Exam Topics
Implement and verify WAN links
•Describe different methods for connecting to a WAN
•Configure and verify a basic WAN serial connection
•Configure and verify Frame Relay on Cisco routers
•Troubleshoot WAN implementation issues
•Describe VPN technology (including: importance, benefits, role, impact, components)
•Configure and verify a PPP connection between Cisco routers

Identify security threats to a network and describe general methods to mitigate those threats
•Describe today‚Äôs increasing network security threats and explain the need to implement a comprehensive security policy to mitigate the threats
•Explain general methods to mitigate common security threats to network devices, hosts, and applications
•Describe the functions of common security appliances and applications
•Describe security recommended practices including initial steps to secure network devices

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QUESTION 1
What is the first 24 bits in a MAC address called?
A.NIC
B.BIA
C.OUI
D.VAI
Answer: C
Explanation:
This question is to examine the MAC address structure.
The MAC address is expressed as a 48-bit hexadecimal number. The first 24-bit number is to identify the vendor/manufacturer, also called OUI. The latter 24-bit is assigned by the vendor.

QUESTION 2
In an Ethernet network, under what two scenarios can devices transmit? (Choose two.)
A. when they receive a special token
B. when there is a carrier
C. when they detect no other devices are sending
D. when the medium is idle
E. when the server grants access
Answer: CD