Classful IP Addressing Starts with a blank screen, title “Classful IP Addressing“ fades in and out. In this presentation, you will learn about the components of an IP address and the types of IP addresses.

<An image of a bunch of computers connected to each other fades in <An image of a bunch of computers connected to each other fades in. Small data image is moving along the line connecting the computers to show that data is passing back & forth. Refer slide on Mod 7 page 3 > To communicate on a network, each computer must have a unique IP address.

192.168.3.100 192.168.2.100 The IP address is the unique identifier that differentiates one computer from another in a network. It helps to locate where that computer resides in the network. <Keep the computers in the background. unique IP addresses to all computers fade in. Continue to show data flowing. > 192.168.2.101 192.168.1.100

IP Address Components 192.168.3.100 192.168.2.100 <A header called “IP Address Components” fades in.> An IP address has two parts—the host ID and the network ID—just as a house address has two parts—a street address and a ZIP code. (narration complete - text remains onscreen) <In the IP addresses, color the host IDs and network IDs with different colors.> 192.168.2.101 192.168.1.100

IP Address Components 192.168.3.100 192.168.2.100 (narration complete - text remains onscreen) <3 boxes or dividing lines fades in to show that the 4 computers are located in 3 different networks. (the 2 computers in the middle belong to the same network) label the networks ‘network 1, 2 & 3> 192.168.2.101 192.168.1.100 Network 1 Network 2 Network 3

IP Address Components (narration complete - text remains onscreen) <All images except one IP address and title fade out> 192.168.1.100

192.168.1. 100 IP Address Components Network ID Host ID <The IP address becomes big and moves to the center> The first part of the IP address is the network ID, and the second part of the IP address is the host ID. Color the network ID. the host ID with different colors. Label those as “Network ID” and “Host ID” >

192 168 1 100 W X Y Z <The header fades out> An IP address contains four numerical segments. An IP address can be represented as w.x.y.z, where w, x, y, and z are numbers with values ranging from 0 to 255. <The labels “Network ID” and “Host ID” fade out. The labels for the 4 parts as w, x, y, and z fade in(as shown in Mod 7 page 4) >

192 168 1 100 192 168 1 100 192 168 1 100 IP Address Classes W X Y Z Class A 192 168 1 100 Class B <A header called “IP Address Classes” fades in> <The bar moves down and fade in 2 more bars above it> Based on the value of w, IP addresses are categorized into address classes. 192 168 1 100 Class C

IP Address Classes Host ID Network ID Host ID Network ID Host ID X Y Z Network ID Host ID Class A Class B Network ID Host ID fade out the ip address (digits) and fade in with 'Network ID" and "Host ID" instead - as shown in slide on pg 4 of Mod 7 in the original course. Address classes define the dividing point between the network ID and host ID. Class C Network ID Host ID

IP Address Classes W X Y Z Class A Class B Class C Network ID Host ID Range of values of w = 1 – 126 Used for very large networks Allows for 126 networks and 16,777,214 hosts per network Class A Network ID Host ID Class B Network ID Host ID Class C <Highlight Class A bar> Class A addresses are assigned to networks with a very large number of hosts. For the IP addresses in class A, the network ID is the first number in the IP address. The remaining numbers identify the host ID. <On the right side of the bar, the following text fades in> Range of values of w = 1 – 126 Used for very large networks Allows for 126 networks and 16,777,214 hosts per network >

IP Address Classes W X Y Z Class A Class B Class C Network ID Host ID Range of values of w = 128 – 191 Used for medium to large networks Allows for 16,384 networks and 65,534 hosts per network Network ID Host ID Class B Network ID Host ID Class C <The previous bullets fade out. Highlight Class B bar.> Class B addresses are assigned to networks that range from medium to large in size. For class B, the network ID is the first two numbers in the IP address. <On the right side of the bar, the following text fade in: Range of values of w = 128 – 191 Used for medium to large networks  Allows for 16,384 networks and 65,534 hosts per network >

IP Address Classes W X Y Z Class A Class B Class C Network ID Host ID Range of values of w = 192 – 223 Used for small local area networks Allows for 2,097,152 networks and 254 hosts per network Network ID Host ID Class C <The previous bullets fadeout. Highlight Class C bar.> Class C addresses are assigned to small local area networks. For class C, the network ID is the first three numbers in the IP address. <On the right side of the bar, the following text fade in: Range of values of w = 192 – 223 Used for small local area networks Allows for 2,097,152 networks and 254 hosts per network >

Reserved for Future Use IP Address Classes W X Y Z Network ID Host ID Class A Network ID Host ID Class B Network ID Host ID Class C Used for Multicasting Class D Range of values of w = 224 – 239 <3 bars move up > Apart from these three address classes, there are classes D and E, which are not allocated to hosts. <2 more bars fade in below the “Class A”, “Class B” and “Class C” bars. Label these 2 new bars “Class D” and “Class E”.> You use class D addresses for multicasting, <In the class D bar, write the text Used for Multicasting. On the right side of the Class D bar, the following text fade in: Range of values of w = 224 – 239> and the class E addresses are reserved for future use. <In the class E bar, write the text Reserved for Future Use. On the right side of the Class E bar, the following text fade in: Range of values of w = 240 – 255 > Reserved for Future Use Class E Range of values of w = 240 – 255

Reserved for Future Use IP Address Classes W X Y Z Network ID Host ID Class A Network ID Host ID Class B Network ID Host ID Class C Used for Multicasting Class D <Fade out the 2 bullets> In this presentation, you have learned about the components of an IP address and the types of IP addresses. Reserved for Future Use Class E