SolStd19 - CHAPTER 19 Network Layer: Logical Addressing...

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1 CHAPTER 19 Network Layer: Logical Addressing Solutions to Odd-Numbered Review Questions and Exercises Review Questions 1. An IPv4 address is 32 bits long. An IPv6 address is 128 bits long. 3. Classful addressing assigns an organization a Class A, Class B, or Class C block of addresses. Classless addressing assigns an organization a block of contiguous addresses based on its needs. 5. A block in class A address is too large for almost any organization. This means most of the addresses in class A are wasted and not used. A block in class C is probably too small for many organizations. 7. The network address in a block of addresses is the first address. The mask can be ANDed with any address in the block to find the network address. 9. Multicast addresses in IPv4 are those that start with the 1110 pattern. Multicast addresses in IPv6 are those that start with the 11111111 pattern. Exercises 11. a. 2 8 = 256 b. 2 16 = 65536 c. 2 64 = 1.846744737 × 10 19 13. 3 10 = 59,049 15. a. 127.240.103.125 b. 175.192.240.29 c. 223.176.31.93 d. 239.247.199.29 17. a. Class E (first four bits are 1s) b. Class B (first bit is 1 and second bit is 0)
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2 c. Class C (first two bits are 1s and the third bit is 0) d. Class D (first three bits are 1s and the fourth bit is 0) 19. With the information given, the first address is found by ANDing the host address with the mask 255.255.0.0 (/16). The last address can be found by ORing the host address with the mask comple- ment 0.0.255.255. However, we need to mention that this is the largest possible block with 2
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This note was uploaded on 09/16/2010 for the course SETAS ETEC301 taught by Professor Multiple during the Winter '09 term at Centennial College.

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SolStd19 - CHAPTER 19 Network Layer: Logical Addressing...

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