CIS 184 030                                           Test 2                                          Chapters 6 & 7

 

17 June, 1999                              _____________________________________  Name

 

1.  What are two important factors that must be taken into consideration when subnetting a network?

a.        how many different subnets are needed

b.        the type of operating system used

c.        the maximum number of hosts required on one subnet

d.        the number of networks that will be accessed

 

2.  What are the benefits of subnetting?

a.        reduces network traffic

b.        optimize performance

c.        simplifies management

d.        all of the above

 

3.  What is the high order bit used in all Class A Networks?

a.        0

b.        10

c.        110

d.        1110

 

4.  How many bits are used in a custom subnet mask to create 6 subnets?

a.  1 bit

b.  2 bits

c.  3 bits

d.  4 bits

e.  5 bits

 

 

5.  Select the two types of routing?

a. static

b. dynamic

c. neutral

d. dominant

 

6.  RIP is a _______.

a. Brouter

b. Distant Vector Protocol

c. OSPF

d.  Link State protocol

 

7.  Which command will display the routing table for your computer?

a. ROUTE

b. ROUTE -A

c. ROUTE PRINT

d.  ROUTE DISPLAY

 

8.Which of the following are true about routers? (choose 3)

a. they are a physical link to the network

b. they are broadcast in nature

c. they operate at the transport layer

d. they use IP addresses

e. they use MAC addresses

f. they work at the network layer 

 

9. RIP uses ____to determine the distance between point A and B.   

a. hops 

b. counts

c. metrics

d. jumps

 

10. Static routing uses _____ to configure networks, while dynamic routing uses _______.

a. ROUTE command-----RIP 

b .ROUTE PRINT-----RIP

c. ROUTER------RIP

d. OSPF----RIP

 

Subnetting Section

 

NOTE: For questions 11 & 12, please use the following IP addresses for host

 

        Host A IP address = 160.16.32.55                                                                              

        Host B IP address = 160.16.48.56

 

11. Using a subnet mask of 255.255.240.0

 

  Are these two nodes (Host A & B) on the same subnet?  Describe your conclusion by providing the following information.

 

Same Network __________ (yes or no)

Network ID for Host A _____160.16.32.0________

Network ID for Host B _____160.16.48.0________

 

 

12.  Using a subnet mask of 255.255.224.0

 

  Are these two nodes (Host A & B) on the same subnet?  Describe your conclusion by providing the following information.

 

Answers

Same Network ____________ (yes or no)

Network ID for Host A __160.16.32.0__

Network ID for Host B __160.16.32.0_____

 

13.  Giving the below information, is this a valid host ID? Explain your answer.

     

      Host IP Address is 192.22.88.5

      Subnet Mask is 255.255.255.252

 

 

Answer ___Yes___ ( .5 is the first valid host on network .4)

 

 

 

14.  Giving the below information, what is the Network ID for this host? Explain your answer.

 

      Host IP Address is 133.15.49.8

      Subnet Mask is 255.255.240.0

 

 

Answer __133.15.48.0__

 

 

 

15.  Giving the below information, determine the Host ID range for the Network ID for this host? Explain your answer.

 

      Host IP Address is 133.15.49.8

      Subnet Mask is 255.255.240.0

 

 

Answer __133.15.48.1 - 133.15.63.254_

 

 

16. You have a network ID of 155.16.0.0. You need at least 500 users per subnet.  Determine the appropriate subnet mask that will give you the greatest number of subnets while still accommodating your need for 500 users per subnet.

 

 

 

Answer __255.255.254.0_

 

 

17. For a class B address of 166.37.0.0 with a subnet mask of 255.255.224.0, which of the following IP addresses are valid? (select all that apply)

 

a.  166.37.25.77

b.  166.37.31.45

c.  166.37.190.88

d.  166.37.200.23

 

 

18.  You have 6 offices, each office requiring its own subnet with each subnet needing up to 25 host. You have a Class C address and you create the subnet mask of 255.255.255.240.

 

Does this subnet mask meet the requirements. Explain your answer.

 

        No you need 6 subnets with 25 users per subnet. A .240 mask will only give you, for a Class C address, 14 host per subnet)

 

19.  You have a network ID 183.85.0.0

      You need to connect 26 offices with a maximum of 600 users. What subnet mask would you use that will give you the most room for user growth?

 

        You would need a subnet mask of 255.255.248.0  The key word is most room for user growth, no subnetwork growth.

 

20.  What is the purpose of a subnet mask? Describe what it does, how it does it.

 

      Subnet mask enables you to extract the Network ID, so that IP can determine if the destination host and the sending host are local or remote to one another, it does this through the ANDing process.  If they are remote to each other, IP knows the data packets need to be routed and send it to a router.

 

21. List all the valid subnet masks. (probably could have worded this differently)

 

       0, 192, 224, 240, 248, 252, 254, 255

 

 

22.  For each of the following number of networks, determine the number of bits needed in subnet mask, the number of networks there will be in total.

 

# of Networks Needed             Bits Needed                   Total Number of Networks

 

48                                                        6                                                                    62

156                                                       8                                                                  254

28                                                        5                                                                    30

312                                                       9                                                                  510

2                                                          2                                                                     2

 

 

23.  For each of the following number of hosts, determine the number of bits needed to support the number of required hosts, the number of hosts there will be in total.

 

# of Host Needed                   Bits Needed                      Total Number of  Hosts

 

48                                                        6                                                                    62

156                                                       8                                                                  254           

28                                                        5                                                                    30

2000                                                    11                                                                2046

300                                                      9                                                                  510

 

24.   For each of the following, give the first three valid subnet IDs

 

Network ID           Subnet Mask              Network 1                     Network 2                                        Network 3

155.42.0.0               255.255.240.0               155.42.16.0                     155.42.32.0                                        155.42.48.0

120.0.0.0                 255.255.0.0                   120.1.0.0                         120.2.0.0                                                120.3.0.0

187.16.0.0               255.255.254.0               187.16.2.0                       187.16.4.0                                            187.16.6.0

210.125.36.0           255.255.255.192           210.125.36.64                 210.125.36.128                                         Invalid

160.106.0.0             255.255.248.0               160.106.8.0                     160.106.16.0                                    160.106.24.0

 

 

25.   For each of the following subnet IDs, give the range of valid host (for that subnet ID only)

 

Network ID           Subnet Mask                          Valid Host Range for Network                                                      

155.42.0.0               255.255.240.0                           155.42.16.1 - 155.42.31.254                                                                

160.106.64.0           255.255.192.0                           160.106.64.1 -160.106.127.254           

185.78.16.0             255.255.254.0                           185.78.16.1 - 185.78.17.254                                                                

15.56.0.0                 255.255.0.0                               15.56.0.1 - 15.56.255.254                                                                    

131.107.64.0           255.255.252.0                           131.107.64.1 - 131.107.67.254

 

 

 

Extra Credit:  5 points each

 

1.  For each of the following host IDs, determine the range of hosts for the subnet

                                                                                 

Host ID                  Subnet Mask                          Valid Host Range for that subnet                                                  

175.42.36.52           255.255.248.0                           175.42.32.1 - 175.42.39.254                                                                

189.64.125.12         255.255.192.0                           189.64.64.1 - 189.64.127.254              

164.53.47.8             255.255.240.0                           164.53.32.1 - 164.53.47.254                                                                

45.36.25.4               255.255.0.0                               45.36.0.1 - 45.36.255.254                                                                    

160.106.78.52         255.255.224.0                           160.106.64.1 - 160.106.95.254

 

 

 

2.  You have two networks 160.16.5.0 and 160.16.9.0 both have the subnet mask of 255.255.255.0 A router  is necessary to send a file from the 160.16.5.0 network to a machine on 160.16.9.0 network.  Write out what the routing table would look like for this Two-Subnet Router?

 

                                See page 116 Table 7.1