Networking Chapter 4 Homework Ccna Guide Cisco Networking Fourth Edition Lab Solutions Lab Solutions

CCNA Guide to Cisco Networking, Fourth Edition Chapter 4 Lab Solutions

Chapter 4 Lab Solutions

Activity Questions Lab 4.1

2. Class C

4. Borrow 2 to get 4 subnets

6. 255.255.255.192 and 11111111.11111111.11111111.11000000

8. 192.3.2.0, 192.3.2.64, 192.3.2.128, and 192.3.2.192

10. 192.3.2.1 to 192.3.2.62, 192.3.2.65 to 192.3.2.126, 192.3.2.129 to 192.3.2.190, and

11. S0/0 192.3.2.1, F0/0 192.3.2.65 and F0/1 192.3.2.129 (can be interchanged)

13. 63 is 00111111, 127 is 01111111; 191 is 10111111, 255 is 11111111; all ones

Review Questions Lab 4.1

1. When working with IP addresses and subnetting, why is it important to first identify

the class of address and the default subnet mask for that class?

2. What values can a multiplier be?

3. How do you find the multiplier?

4. Why must you subtract 2 from 2x when determining the number of hosts per subnet?

5. How do you know where to begin incrementing when determining subnet numbers?

6. When working with IP addresses, which addresses can never be assigned to a host?

7. How can you tell if an IP address is a network or subnetwork number if you write out

the address in binary?

CCNA Guide to Cisco Networking, Fourth Edition Chapter 4 Lab Solutions

2

The host portion will be all binary 0s.

8. How can you tell if an IP address is a broadcast address if you write out the address

in binary?

9. Must router interfaces be assigned the first available host address in a range?

Activity Questions Lab 4.2

2. 11111111.11111111.11110000.00000000; 255.255.240.0; y=4

4. 212-2=4094

6. 172.16.0.0

8. 172.16.15.255, 172.16.31.255, 172.16.47.255, 172.16.63.255, 172.16.79.255,

9. Broadcast address

10. 172.16.16.0

Review Questions Lab 4.2

1. Where do you think the term “bit–count” comes from?

2. What is a benefit of using bit-count notation to express the subnet mask?

3. What would the bit-count notation of the IP address given in this lab have been if

there were no subnetting?

4. If there were no subnetting in this lab, what would the given IP address have

represented?

172.16.0.0.

Activity Questions Lab 4.3

2. 11111111.11111111.11000000.00000000; 255.255.192.0

3. 512

3

4. 16,382

5. 64

7. 120.0.0.0, 120.0.64.0, 120.0.128.0, 120.0.192.0, 120.1.0.0, 120.1.64.0, 120.1.128.0

120.1.127.255, 120.1.191.255

10. 120.15.128.0

Review Questions Lab 4.3

1. What makes subnetting with Class A and Class B addresses more difficult than

subnetting with Class C addresses?

2. What is the maximum number of bits that can be borrowed with a Class C address?

3. What is the maximum number of bits that can be borrowed with a Class B address?

4. What is the maximum number of bits that can be borrowed with a Class A address?

5. What would the subnet mask be in dotted decimal notation for a Class C address if

there were 30 hosts per subnet?

Activity Questions Lab 4.4

3. 2y=18, y=5, 32

5. 255.255.248.0; 11111111.11111111.11111000.00000000

176.10.48.0, 176.10.56.0, 176.10.64.0

176.10.47.255, 176.10.55.255, 176.10.63.255, 176.10.71.255

47.254; 48.1 to 55.254; 56.1 to 63.254; 64.1 to 71.254

9. RouterA F0/0 – 176.10.0.1, F0/1 – 176.10.8.1, S0/0 – 176.10.16.1, S0/1 –

4

176.10.24.1

RouterB F0/0 – 176.10.32.1, F0/1 – 176.10.40.1, S0/0 – 176.10.48.1, S0/1 –

176.10.16.2

RouterC F0/0 – 176.10.56.1, F0/1 – 176.10.64.1, S0/0 – 176.10.24.2, S0/1 –

Review Questions Lab 4.4

1. True or False? Interfaces attached by point-to-point links such as the one between

RouterA’s S0/0 and RouterB’s S0/1 in Figure 4-2 are on the same network (or

subnetwork).

2. What kind of IP address is indicated by all binary ones in the host portion?

3. What kind of IP address is indicated by all binary zeroes in the host portion?

4. What is the purpose of a subnet mask?

5. What might you do if, when you borrowed enough bits for subnet numbers, you were

not left with enough bits for host numbers?

Activity Questions Lab 4.5

1. 211 = 2048; 210 = 1024; 29 = 512; 28 = 256

3. 011111010001

5. 7D1

7. 1100 1101 0100

8. 2048+1024+128+64+16+4=3284

Review Questions Lab 4.5

1. For what purposes is the binary numbering system used in networking?

5

2. For what purposes is the hexadecimal numbering system used in networking?

3. Why does it require fewer hexadecimal numerals than binary numerals to express

any given number?

4. True or False? Some numbers are too large to be expressed in binary.