Cisco CCNA IPv4 and IPv6 Addressing 3

Question 1

Which of the following is a valid IPv6 link-local address prefix?

Accepted Answer

FE80::/10

Answer

Link-local addresses always start with FE80::/10 and are automatically assigned to every IPv6-enabled interface.

Question 2

What does the 'network address' of a subnet represent?

Accepted Answer

The base address that identifies the subnet itself

Answer

The network address (all host bits set to 0) identifies the subnet and cannot be assigned to a host.

Question 3

An interface receives the IPv6 address 2001:DB8::1/64 via stateless address autoconfiguration (SLAAC). Which portion is derived from the router advertisement?

Accepted Answer

The first 64 bits (prefix)

Answer

SLAAC uses the 64-bit prefix advertised by the router and the device generates its own 64-bit interface ID (typically from the EUI-64 process).

Question 4

Which private IPv4 address range is defined in RFC 1918 for Class B networks?

Accepted Answer

172.16.0.0 – 172.31.255.255

Answer

RFC 1918 designates 172.16.0.0 through 172.31.255.255 (172.16.0.0/12) as private Class B space.

Question 5

How many usable host addresses are available in a /29 subnet?

Accepted Answer

6

Answer

A /29 subnet has 3 host bits (2^3 = 8 addresses), minus 2 for network and broadcast, leaving 6 usable hosts.

Cisco CCNA Practice Test

Cisco CCNA Practice Test

Cisco CCNA IPv4 and IPv6 Addressing 3