ICND1 IPv4 and IPv6 4

Question 1

Which command verifies IPv6 connectivity to a remote host from a Cisco router?

Accepted Answer

ping ipv6 2001:DB8::1

Answer

The 'ping ipv6' command (or 'ping 2001:DB8::1') tests end-to-end IPv6 reachability from a Cisco device.

Question 2

What is the total number of bits in an IPv6 address?

Accepted Answer

128

Answer

IPv6 addresses are 128 bits long, written as eight groups of four hexadecimal digits separated by colons.

Question 3

Which subnet contains the host address 192.168.1.200 with a mask of 255.255.255.224 (/27)?

Accepted Answer

192.168.1.192/27

Answer

A /27 uses blocks of 32: .0, .32, .64, .96, .128, .160, .192; address .200 falls in the .192 block (range .192–.223).

Question 4

What is the IPv6 loopback address?

Accepted Answer

::1

Answer

::1 is the IPv6 loopback address (equivalent to 127.0.0.1 in IPv4), used to test the local IPv6 stack.

Question 5

How many subnets are created when a Class C network is subnetted with a /27 mask?

Accepted Answer

8

Answer

A Class C uses a /24 default; borrowing 3 additional bits for subnetting gives 2^3 = 8 subnets.

(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test