EIGRP for IPv4 and IPv6

B

The correct answer is B. Only EIGRP for IPv6 requires a router ID to be configured under the routing process.

Explanation:

EIGRP (Enhanced Interior Gateway Routing Protocol) is a routing protocol used for exchanging routing information between routers in a network. It is used to determine the best path for forwarding data packets in a network.

EIGRP for IPv4 and IPv6 are two different implementations of EIGRP for different versions of IP addressing. While EIGRP for IPv4 is used for networks that use IPv4 addressing, EIGRP for IPv6 is used for networks that use IPv6 addressing.

Option A is incorrect because both EIGRP for IPv4 and IPv6 advertise connected networks.

Option C is incorrect because both EIGRP for IPv4 and IPv6 use Autonomous System (AS) numbers to identify and differentiate between multiple EIGRP domains.

Option D is incorrect because both EIGRP for IPv4 and IPv6 can be enabled globally on a router.

The correct answer is B because only EIGRP for IPv6 requires a router ID to be configured under the routing process. The router ID is used to uniquely identify the router within the EIGRP domain, and it must be configured manually in EIGRP for IPv6. In contrast, EIGRP for IPv4 will automatically select the highest IP address on a loopback interface as the router ID if one is not manually configured.