Networking exercise: How many possible hosts would there be on the above network if all usable addresses were assigned?

PC & Industrial Networks
70 Points
Answer each of the following questions in complete detail:
1. (10 points) Assume a host computer has the following configuration:

IP Address: 200.110.84.176

Subnet Mask: 255.255.248.0

Default Gateway: 200.110.84.1

a. What is the Class of this ‘network’?

b. Is this a Network, Subnetwork, Supernetwork or something else? How do you know?

c. How many possible hosts would there be on the above network if all usable addresses were assigned?

d. How would this IP address be expressed using CIDR notation?

e. Using CIDR notation, what is the range of the block of addresses this Host belongs to?

2. (6 points) Explain everything that can be determined from the following:

a. fe80::9890:96ff:fea1:53ed%12

b. 2002:77fe:8921::77fe:8921

c. ::01

d. ::

3. (4 points) What is the significance of the ninth octet in the header of the IP datagram?

4. (5 points) SSK Corp has offices in Toledo, Detroit and Columbus. Each office has 127

Computers. The IT plan calls for connecting all offices using data lines. The Toledo site will also connect to the Internet. SSK Corp. has elected to use PUBLIC IP address space on all computers at each of its sites.

Their ISP has restricted the IP ranges to the ones below. The ISP’s Network

Administrator is on vacation – you have been asked to fill-in and select a range of addresses that will satisfy SSK Corp.’s needs with the least amount of wasted IP addresses. Propose a range of addresses for SSK Corp. and explain your answer.

225.113.8.0/24

225.113.9.0/24

192.168.0.0/16

221.127.136.0/24

221.128.135.0/24

221.128.136.0/24

221.128.137.0/24

221.128.138.0/24

206.122.148.0/24

10.0.0.0/8

221.125.138.0/24

221.126.137.0/25

221.128.139.0/24

5. (5 points) Using the IP ranges below:

a) What IP range would an ISP provide to a customer, if the customer wanted a range of Public IP’s for use on the Internet? Explain your choice and why you feel the other choices are not adequate?

b) Using the Range you selected in ‘5a’ above – subnet the range into as many /28 networks as possible – show your work and each /28 range of addresses. (Show the network address and the broadcast address for each /28 subnet)

225.113.8.0/24

225.113.9.0/25

192.168.0.0/16

201.127.136.0/24

172.16.0.0/24

10.0.0.0/8

169.254.137.0/25

245.125.1378.0/24

10.0.0.0/24

245.0.0.0/8

127.0.0.0/8

6. (15 points) The following information was extracted from an Ethernet Frame:

IP Datagram Header: 45 00 00 44 5b d2 00 00 80 11 ef 4d 83 b7 75 39 83 b7 72 e1

Based on the above information, describe everything that can be determined about this packet (give the actual data value for each field). Convert each field to its normally displayed value (i.e. Hexadecimal/Decimal/Binary).

Example: Version is 4 which is IPv4

7. (10 points) Bob obtained the following information from a workstation: C:\>ipconfig

Ethernet adapter Local Area Connection:

IP Address. . . . . . . ……… . : 169.254.10.105 Subnet Mask . . . . . . ……… : 255.255.0.0 Default Gateway . . . . ……..:

Link-Local IPv6 Address…..fe80::9890:96ff:fea1:53ed%12

a. Explain everything that can be determined about this host.

After waiting 5 minutes and making no changes to his workstation. Bob obtained the following information from his workstation.

C:\>ipconfig

Ethernet adapter Local Area Connection:

IP Address. . . . . . . . ………………: 138.110.10.50 Subnet Mask . . . . . . …………….. : 255.255.0.0

Default Gateway . . . …………….. : 138.110.10.1

Link-Local IPv6 Address………….:fe80::9890:96ff:fea1:53ed%12

b. How would you explain the changes to the IP stack? Explain in detail what occurred.

8. (5 points) Explain each of the good ‘Network Design goals’ as discussed in class.

9. (10 points) You have been given the task of changing the IP Address and enabling telnet remote access on a CISCO 2950 enterprise switch.

The current IP address is 172.25.2/16 the new IP address is 10.0.0.2/24

The enterprise switch has no password configured.

a. Explain all of the commands needed for you to successfully accomplish the IP Address change and telnet remote access.

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