1. INTRO Module 1 Boolean Math

2. Curriculum Reference CCNA 1 v 3.1 module 1 networking basics
Sub module 1.2 Network Math

3. What in this module ASCII Code Decimal Binary Hexadecimal
Boolean Logic
IP Addressing And Network Mask

4. מצגת המרות

5. Exurcise

6. Boolean Logic
Boolean logic is a binary logic that allows two numbers to be compared and a choice generated based on the two numbers.
These choices are the logical AND, OR and NOT.
Computers are built from various types of electronic circuits.
These circuits depend on what are called AND, OR, and NOT logic "gates."
These gates are characterized by how they respond to input signals.

7. Boolean Logic – AND The AND operation takes two input values.
If both are 1, the logic gate generates a 1 output. Otherwise it outputs a 0.
There are four combinations of input values.
Three of these combinations generate a 0, and one combination generates a 1.

8. Boolean Logic – OR The OR operation also takes two input values.
If at least one of the input values is 1, the output value is 1.
Again there are four combinations of input values.
This time three combinations generate a 1 output and the fourth generates a 0 output.

9. Boolean Logic – NOT
The NOT operation takes whatever value is presented, 0 or 1, and inverts it.
A one becomes a zero and a zero becomes a one.
The logic rule that they follow is whatever the input is, the output is the opposite.

10. IP Addresses and Network Masks
The IP address of a computer consists of a network and a host part that represents a particular computer on a particular network.

11. IP Addresses and Network Masks
To inform a computer how the 32-bit IP address has been split, a second 32-bit number called a subnetwork mask is used.
This mask is a guide that indicates how the IP address should be interpreted by identifying how many of the bits are used to identify the network of the computer.
A subnet mask will always be all 1s until the network address is identified and then be all 0s from there to the right most bit of the mask.

12. IP Addresses and Network Masks
Some examples of subnet masks are:
written in dotted decimal as or
written in dotted decimal as
written in dotted decimal as

13. IP Addresses and Network Masks
Performing a Boolean AND of the IP address and the subnet mask produces the network address of this host:
Converting the result to dotted decimal, is the network portion of the IP address, when using the mask.

14. IP Addresses and Network Masks
Given the following information, determine the network and host portion of the IP address:
IP address:
Subnet Mask:
IP address:
Subnet Mask:

15. INTRO Module 1 Connecting the Internet The - End