Microsoft Networking Essentials Exam IP Addressing & Subnetting 3

Question 1

What is the purpose of the subnet mask in IP networking?

Accepted Answer

To distinguish the network portion from the host portion of an IP address

Answer

A subnet mask identifies which bits of an IP address represent the network and which represent the host, enabling routing decisions.

Question 2

Which IPv6 address type is equivalent to IPv4 private addresses and is only routable within a local network?

Accepted Answer

Unique local

Answer

Unique local addresses (fc00::/7) are the IPv6 equivalent of RFC 1918 private addresses and are not routable on the public internet.

Question 3

An administrator needs to divide a 192.168.1.0/24 network into at least 6 subnets. What is the minimum prefix length required?

Accepted Answer

/27

Answer

A /27 borrows 3 bits from the host portion, creating 2^3 = 8 subnets, which meets the requirement of at least 6.

Question 4

What is the valid host range for the subnet 10.0.0.128/25?

Accepted Answer

10.0.0.129 – 10.0.0.254

Answer

The subnet 10.0.0.128/25 has network address 10.0.0.128 and broadcast 10.0.0.255, leaving 10.0.0.129–10.0.0.254 as valid hosts.

Question 5

Which address resolution protocol maps IP addresses to MAC addresses on a local network?

Accepted Answer

ARP

Answer

ARP (Address Resolution Protocol) resolves IPv4 addresses to MAC addresses so frames can be delivered on the local network.

Microsoft Networking Essentials Exam Practice Test