Cisco CCNA IPv4 and IPv6 Addressing 5

Question 1

What is the broadcast address for the subnet 10.10.20.0/28?

Accepted Answer

10.10.20.15

Answer

A /28 has a block size of 16; starting at .0, the broadcast address is .0 + 16 – 1 = 10.10.20.15.

Question 2

Which type of IPv6 address is automatically configured on an interface and used for neighbor discovery and routing protocol traffic on the local link?

Accepted Answer

Link-local

Answer

Link-local addresses (FE80::/10) are auto-configured on every IPv6 interface and are used for local-link communication including NDP and routing protocol hellos.

Question 3

A company needs 10 subnets from 192.168.1.0/24 with at least 10 hosts each. Which prefix length meets both requirements?

Accepted Answer

/27

Answer

A /27 provides 32 subnets (2^5) from a /24 and 30 usable hosts each (2^3 – 2), satisfying both requirements.

Question 4

Which IPv6 address represents the loopback address?

Accepted Answer

::1

Answer

::1 (expanded: 0000:0000:0000:0000:0000:0000:0000:0001) is the IPv6 loopback address, equivalent to 127.0.0.1 in IPv4.

Question 5

What is the maximum number of subnets created when borrowing 4 bits from the host portion of a classful Class C network?

Accepted Answer

16

Answer

Borrowing 4 bits provides 2^4 = 16 subnets (all 16 are usable with classless/CIDR addressing).

Cisco CCNA Practice Test

Cisco CCNA Practice Test

Cisco CCNA IPv4 and IPv6 Addressing 5