Chapter 14 - Analyzing Existing Subnets

Question 1

What is the subnet ID/network ID?

Answer 1

Am IP address that represents a network.

Question 2

What is a Subnet Broadcast Address?

Answer 2

The highest IP in a subnet that is used as the destination of a packet when someone wants that packet to be sent to all hosts on a subnet. Also known as the Directed Broadcast Address.

Question 3

True or False. When converting and IP to binary, the subnet mask octets that are 255 will keep the IP as the same in those octets.

Answer 3

True.

Question 4

To Find the Subnet ID using Decimal

Answer 4

Do 256 - <interesting> (=magic number) and multiply the magic number (0 IS INCLUDED) until you reach the interesting octet of the IP or the nearest number to it. This is the subnet ID.</interesting>

Question 5

To Find the Broadcast Address using Decimal

Answer 5

Do 256 - <interesting> (=magic number) and add the magic number to the interesting octet of the subnet ID then take away 1. This is the broadcast address.</interesting>

Question 6

What is the Interesting Octet?

Answer 6

The octet where the subnet mask isn’t 255 or 0