Binary Lesson 5 Classful IP Addresses IP Addresses

Binary Lesson 5 Classful IP Addresses

IP Addresses (version 4) IP addresses are 32 bits long n Four bytes or "octets" n Examples: n 147. 144. 1. 212 n 1. 2. 3. 4 n 192. 168. 0. 1 n n Each octet must be in the range 0 to 255

Network and Host Portions Class A Addresses 1. 2. 3. An IP address of 1. 2. 3. 4 specifies both the network and the host The network portion tells the Internet routers where to send packets The host portion tells routers on the destination LAN which host the packet is destined for

Network and Host Portions Class A Addresses 1. For Class A addresses like 1. 2. 3. 4 1. The network portion is the first octet 1 2. The host portion is the last three octets 2. 3. 4 2. This system was used until 1981

1981: Class A, B, C Addresses 1. Class A (1. 2. 3. 4) 1. 2. Class B (140. 5. 6. 7) 1. 2. 3. Network portion: first octet (1) Host portion: last three octets (2. 3. 4) Network portion: first two octets (140. 5) Host portion: last two octets (6. 7) Class C (199. 7. 8. 9) 1. 2. Network portion: first three octets (199. 7. 8) Host portion: last octet (9)

First Octet Determines Class 1. 2. 3. Class A 1. First octet from 1 to 127 Class B 1. First octet from 129 to 191 Class C 1. First octet from 192 to 223

Network and Host Portions 1. 2. Consider this address: 147. 144. 0. 1 Class B 1. The first 2 octets determine the network 1. 147. 144 2. The last two octets determine the host 1. 0. 1

Classful Addressing i. Clicker Questions

What class is this address in? 15. 254. 222. 199 A. B. C. D. Class A Class B Class C That address is not valid 1 of 11

What class is this address in? 215. 2. 1. 254 A. B. C. D. Class A Class B Class C That address is not valid 2 of 11

What class is this address in? 185. 2. 1. 0. 2 A. B. C. D. Class A Class B Class C That address is not valid 3 of 11

What class is this address in? 147. 144. 1. 312 A. B. C. D. Class A Class B Class C That address is not valid 4 of 11

What class is this address in? 147. 144. 1. 212 A. B. C. D. Class A Class B Class C That address is not valid 5 of 11

What is the network portion of this address? 2. 255. 14. 193 A. B. C. D. E. 2 2. 255. 14 193 14. 193 6 of 11

What is the host portion of this address? 222. 2. 2 A. B. C. D. E. 222. 22 222. 2 2 2. 2 7 of 11

What is the network portion of this address? 100. 255. 1 A. B. C. D. E. 100. 200 100. 255 1 255. 1 8 of 11

What is the host portion of this address? 101. 99. 254. 2 A. B. C. D. E. 101. 99 2 254. 2 99. 254. 2 9 of 11

What is the network portion of this address? 193. 192. 193. 191 A. B. C. D. E. 192 193. 192. 193 191 193. 191 10 of 11

What is the host portion of this address? 147. 144. 1. 212 A. B. C. D. E. 147. 144 1. 212 144. 1. 212 11 of 11