640-802 CCNA Study Guide - Elktech.org

Cisco 640-802 Exam
QUESTION NO: 248
Running both IPv4 and IPv6 on a router simultaneously is known as what?
A. 4to6 routing
B. 6to4 routing
C. binary routing
D. dual-stack routing
E. NextGen routing
Answer: D
Explanation:
The knowledge point of this question is IPv6 address translation. At present, there are three
transition mechanisms:
Dual-Stack
Tunneling
Translation
Dual-Stack allows users to use both IPv4 and IPv6, supporting both IPv4 and IPv6 while sharing
most of the code.
Tunneling establishes communication by allowing two IPv6 hosts to use the existing IPv4
infrastructure to carry IPv6 packets. The current network protocols, such as WWW, FTP and
Email, exist in IPv4 network. Transition mechanism will allow users on IPv6 network to access
resources on IPv4, it is a vital technology.
QUESTION NO: 249
What are three IPv6 transition mechanisms? (Choose three.)
A. 6to4 tunneling
B. VPN tunneling
C. GRE tunneling
D. ISATAP tunneling
E. PPP tunneling
F. Teredo tunneling
Answer: A,D,F
Explanation:
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