Which statement is true about 6to4 tunneling?(Choose Two)
A. IPv4 traffic is encapsulated with an IPv6 header
B. the edge router can use locally configured IPv6 address
C. host and routers inside a 6to4 site will need a special code
D. an edge router must use IPv6 address of 2002::/16 in its prefix
I think answer is only D; since the other 3 answer does not meet requirement
please refer below doc
https://packetlife.net/blog/2010/mar/15/6to4-ipv6-tunneling/
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/xe-3s/ir-xe-3s-book/ip6-6to4-tunls-xe.html
I think answer is only D; since the other 3 answer does not meet requirement
https://packetlife.net/blog/2010/mar/15/6to4-ipv6-tunneling/
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/xe-3s/ir-xe-3s-book/ip6-6to4-tunls-xe.html
I think answer is only D; since the other 3 answer does not meet requirement
(A is wrong)it enables encapsulation of IPv6 packets into IPv4 for transport across an IPv4 network
(B is wrong) The key requirement is that each site have a globally unique IPv4 address; the Cisco software uses this address to construct a globally unique 6to4/48 IPv6 prefix
(C – does not mentioned anything on the doc, looks wrong)
https://packetlife.net/blog/2010/mar/15/6to4-ipv6-tunneling/
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/xe-3s/ir-xe-3s-book/ip6-6to4-tunls-xe.html
BD?
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/xe-3s/ir-xe-3s-book/ip6-6to4-tunls-xe.html
The tunnel destination is determined by the IPv4 address of the border router extracted from the IPv6 address that starts with the prefix 2002::/16, where the format is 2002:border-router-IPv4-address ::/48. Following the embedded IPv4 address are 16 bits that can be used to number networks within the site.
BD?
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/xe-3s/ir-xe-3s-book/ip6-6to4-tunls-xe.html#GUID-4E9F746E-61FE-4F9D-9BDE-3E6B3C32C7F0
The key requirement is that each site have a globally unique IPv4 address; the Cisco software uses this address to construct a globally unique 6to4/48 IPv6 prefix.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic/configuration/15-mt/ip6b-15-mt-book/ip6-uni-routing.html#GUID-9056867B-EFD2-40E4-8315-9AF9F5D6638C