Exam 200-301 topic 1 question 935 discussion

C is incorrect, it contains 2 double colons so not a valid address. ::ffff:10.14.101.1/96 is a valid IPv4-mapped IPv6 address, google it.

The two IPv6 addresses that are used to provide connectivity between two routers on a shared link are: A. FF02::0001:FF00:0000/104 D. 2001:701:104b:1111::1/64 A. FF02::0001:FF00:0000/104 is the multicast address used for the solicited-node multicast address. This address is used to communicate with a specific IPv6 address on a shared link. When a device needs to send an IPv6 packet to a specific device, it first sends a Neighbor Solicitation message to the solicited-node multicast address for the destination IPv6 address. The router receiving this message responds with a Neighbor Advertisement message containing its MAC address. D. 2001:701:104b:1111::1/64 is a link-local address that is automatically assigned to the interface of the router on the shared link. Link-local addresses are used to communicate with other devices on the same link and are not routable. This address is used by the routers to communicate with each other on the shared link.

So, it should be A,D

C incorrect, no valid address B Incorrect, multicast address (not for router to router coonnectivity) E IPv4-mapped address, typically used in dual-stack or transition technologies and would not be used for direct IPv6 router-to-router communication. left with A&D, valid multicast address and valid global unicast

D and E

To provide connectivity between two routers on a shared link using IPv6, the routers typically use link-local addresses and global unicast addresses. Here are the correct choices: A. FF02::0001:FF00:0000/104 This is the multicast address used for IPv6 Neighbor Discovery Protocol (NDP). It's used for routers to discover each other on a shared link. D. 2001:701:104b:1111::1/64 This is an example of a global unicast address that could be assigned to one of the router interfaces for communication over the shared link.

D & E are correct

A & D are better choices than others

It appears to be a typo in "C" IPV6 address. I would go with C & D.

The addresses used to provide connectivity between two routers on a shared link in IPv6 typically fall under the link-local scope. Link-local addresses are used for communication on the same link and are not routable beyond that link. Two common link-local addresses are: A. FE80::/10 (Link-Local Unicast - used for communication on the same link) B. FF02::1 (All Nodes Multicast - used for communication with all nodes on the link) So, the correct choices are: A. FF02::0001:FF00:0000/104 (This is an IPv6 multicast address for solicited-node multicast, commonly used in neighbor discovery.) B. ff06:bb43:cc13:dd16:1bb:ff14:7545:234d (This does not fall into the link-local scope and is not typically used for connectivity between two routers on a shared link.) Therefore, the correct answers are A and a revised B.

A & B are used for multicast and can't be assigned to the router B is also missing the subnet mask C is using double colons more than once which is prohibited D & E is the correct answer

Read carefully: "ON A SHARED LINK" Though a valid IP, we don't need mapped IPs/Tunnels/whatever in a shared link, so "::ffff:10.14.101.1/96" is not an option. AD are correct, read also what JJY888 posted.

A. FF02::0001:FF00:0000/104: This multicast address is used for IPv6 Neighbor Discovery's "Solicited-Node Multicast" group. D. 2001:701:104b:1111::1/64: This is an IPv6 unicast address. While it can be used for connectivity between two routers on a shared link, it's not a multicast address specifically designed for Neighbor Discovery like the address in option A. However, it can still be used for routing and communication between routers on the shared link. E. is an IPv4-mapped IPv6 address, which is used to represent IPv4 addresses in an IPv6 format, but it's not specifically used for router-to-router connectivity on a shared link.They are specifically used for communication between IPv6-only and IPv4 systems during the transition period from IPv4 to IPv6.

IPv4-mapped IPv6 addresses are of the form ::FFFF:a.b.c.d, where a.b.c.d represents the IPv4 address. These addresses are primarily used for applications and systems that need to communicate with IPv4 devices over an IPv6 network. When an IPv6-only system communicates with an IPv4 system using an IPv4-mapped IPv6 address, the IPv6 network can encapsulate the IPv6 packets within IPv4 packets, allowing the communication to traverse IPv4 networks. Therefore, IPv4-mapped IPv6 addresses are not designed to provide connectivity between two routers on a shared link. They are specifically used for communication between IPv6-only and IPv4 systems during the transition period from IPv4 to IPv6. For direct communication and connectivity between two routers on a shared link, you should use standard IPv6 unicast addresses. Unicast addresses are used for point-to-point communication between individual devices, including routers. These addresses follow the standard IPv6 address format and are routable on the IPv6 network.

A and D

the IPv6 address "::ffff:10.14.101.1/96" is a valid representation of an IPv6 address with an embedded IPv4 address. This format is known as IPv4-mapped IPv6 address. In this case, "::ffff:10.14.101.1" represents the IPv4 address "10.14.101.1" embedded within an IPv6 address. The "::ffff:" prefix indicates that the following part of the address is an IPv4 address. The "/96" suffix indicates the network prefix length, specifying that the first 96 bits represent the network portion of the address.

the IPv6 address "::ffff:10.14.101.1/96" is a valid representation of an IPv6 address with an embedded IPv4 address. This format is known as IPv4-mapped IPv6 address. In this case, "::ffff:10.14.101.1" represents the IPv4 address "10.14.101.1" embedded within an IPv6 address. The "::ffff:" prefix indicates that the following part of the address is an IPv4 address. The "/96" suffix indicates the network prefix length, specifying that the first 96 bits represent the network portion of the address.