GRE tunnels
automatic 6 to 4 tunnels
ISATAP tunnels
manual tunnels （RFC 2893）
第1题：
Refer to the exhibit. Which interoperability technique implemented on the dual - stack routers would allow connectivity between IPv6 sites across automatic created tunnels using the 2002::/16 prefix? （）
A. Dual Stack
B. NAT - PT
C. 6to4 tunnel
D. GRE tunnel
E. ISATAP tunnel
第2题：
A.dual stack
B.dynamic
C.Teredo
D.Manual 6to4
第3题：
The answers each list a tunnel method and two consecutive IPv6 address quartets.Which answers identify a tunneling method that relies on an IPv4 address to be embedded into an IPv6 address, within the correct quartets listed?（）
A. Automatic 6to4, quartets 2 and 3
B. Automatic 6to4, quartets 7 and 8
C. ISATAP, quartets 2 and 3
D. ISATAP, quartets 7 and 8
第4题：
A company is using 6to4 tunneling within their IPv6 network. Which two statements about this kindof tunneling are accurate？（）
第5题：
Which name describes an IPV6 host-enable tunneling technique that uses IPV4 UDP,does not require dedicated gateway tunnels,and can pass through existing IPV4 NAT gateways?（）
第6题：
In IPv6 network, an IPv6 overlay tunnel is required to communicate with isolated IPv6 networks across the existing IPv4 infrastructurE. There are currently fiv e IPv6 overlay tunnel types.Which three IPv6 overlay tunnel statements are true？（）
A. Overlay tunnels can only be configured between border routers capable of supporting IPv4 and IPv6.
B. An manual overlay tunnel supports point - to - multipo int tunnels capable of carrying IPv6 and Connectionless Network Service (CLNS) packets.
C. Overlay tunneling encapsulates IPv6 packets in IPv4 packets for delivery across an IPv4 infrastructure.
D. Overlay tunnels can be configured between border route rs or between a border router and a host capable of supporting IPv4 and IPv6.
E. Cisco IOS supports manual, generic routing encapsulation (GRE), IPv4 - compatible, 6to4, and Intra - Site Automatic Tunnel Addressing Protocol (ISATAP) overlay tunneling mechan isms.
F. Cisco IOS supports manual, generic routing encapsulation (GRE), IPv6 - compatible, 4to6, and Multiprotocol Label Switching (MPLS) overlay tunneling mechanisms.
第7题：
Two islands of IPv6 networks that are running ISIS （IPv6 IGP） must be connected using a tunnel over anIPv4 network. Which tunneling method can be used to achieve this goal？（）
第8题：
A. Automatic 6to4
B. Manually configured tunnel
C. ISATAP
D. GRE
第9题：
Which two tunneling techniques in IPv6 do not require an IPv4 tunnel destination in the configuration？（）
第10题：
Which two tunneling techniques support IPv6 multicasting？（）