Cisco Certified Network Associate (CCNA) Practice Exam

Which two of these statements are true of IPv6 address representation?

1. The first 64 bits represent the dynamically created interface ID

2. A single interface may be assigned multiple IPV6 addresses of any type

3. Every IPV6 interface contains at least one loopback address

4. Leading zeros in an IPV6 16 bit hexadecimal field are mandatory

The correct answer is: A single interface may be assigned multiple IPV6 addresses of any type

The choice that indicates a single interface may be assigned multiple IPv6 addresses of any type is accurate because IPv6 allows an interface to be assigned several addresses. This flexibility is particularly beneficial for network configurations that require multiple types of addresses, such as global unicast, unique local addresses, and link-local addresses. By supporting multiple addresses, IPv6 enhances network scalability and the ability to manage different applications or functions concurrently on the same device. In contrast, the other statements do not hold true. The representation of IPv6 addresses dictates that the first 64 bits generally represent the network prefix, not the dynamically created interface ID. While it is true that every IPv6 interface contains at least one loopback address, the specifics of addressing can vary, and so this could be misinterpreted. Lastly, leading zeros in an IPv6 16-bit hexadecimal field are optional; they can be omitted to simplify the representation of addresses. Therefore, maintaining an understanding of these characteristics of IPv6 addressing is crucial for effective network management and configuration.