The Internet
Q.1. A Domain Name Server can provide the IP address of a server computer
given the client computer’s location.
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Q.2. If you have its host name, you can reach a web server even if the server
doesn’t have an IP address.
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Q.3. The host name is the address that is included in outgoing messages
during the encapsulation process.
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Q.4. A Domain Name Server is used to provide an IP address given the
host name of a server.
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Q.5. Your home PC doesn’t need a host name when you are on the Internet.
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Q.6. An IP address is a string of bits.
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Q.7. Which of the following can be provided by an autoconfiguration server? (Circle all correct
answers)
a) a permanent IP address for the client computer
b) the IP address of the default gateway
c) a temporary IP address for the client computer
d) the IP address of the DNS server
e) the permanent IP address of the autoconfiguration server
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Q.8. How long (in terms of bits) is the network part of the 192.2.2.2 IP address?
a) 10 bits
b) 16 bits
c) 8 bits
d) None of the above (Class C network part is 24 bits long)
CIS 3200 Networking Fundamentals
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Q.9. If a user has an operational telephone line, you need the following on the user end in order
to establish a DSL connection: (Circle all correct answers assuming that the user has two
telephones that need to be used for phone calls)
a) a switch
b) a DSL modem
c) two splitters
d) three splitters
e) a DSLAM
f) an ISP
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Q.10. Which of the following IP addresses is/are not valid?
a) 133.133.133.133
b) 129.23.257.18
c) 235.45.0.0
c) 129.191.263.23
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Q.11. Using the conversion system illustrated below, convert the following IP address to 32-bit
notation: 129.65.4.2
Position
(N)
7
6
5
4
3
2
1
0
Place Value
(2N)
Bit
Decimal
128
64
32
16
8
4
2
1
Your answer:
129 = _10000001______
65 = __01000001______
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4 = ___00000100______
2 = ___00000010______
Q.12. Using the conversion system illustrated below, convert the following IP address to dotted
decimal notation: 10001011 01000101 00001000 00000011. (Spaces are included to facilitate
reading.)
Position
(N)
7
6
5
4
3
2
1
0
Place Value
(2N)
Bit
128
64
32
16
8
4
2
1
CIS 3200 Networking Fundamentals
Decimal
Your answer:
10001011 = _139__
01000101 = __69__
00001000 = ___8__
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00000011 = ___3__
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Q.13. Based on the table shown below, give the class and the network part of each of the
following IP addresses.
Class
Leftmost
bits
Class A 0xxx
Class B 10xx
Class C 110x
Network Part
Length
Address range
8 bits
16 bits
24 bits
0.x.x.x to 127.x.x.x
128.0.x.x to 191.255.x.x
192.0.0.x to 223.255.255.x
IP address
Class?
10101010111110000101010100000001 B
Network part (in dotted decimal
notation)?
170.248
191.255.255.255
191.255
B
01010100111110000101010100000001 A
84
110.111.120.228
A
110
01111100111110000101010100010001 A
124
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Q.14. Even if a web server could be reach without knowing its host name, the host name is
needed by most Internet users in order for them to reach a web server. Explain why.
Most users only know servers’ host names (e.g. eiu.edu) because they are easier to
remember than IP addresses. So, most users need the host names to be able to
reach a web server.
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CIS 3200 Networking Fundamentals
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Q.15. Contoso Inc. is a small company with two departments (Marketing and Sales). In order to
take advantage of the growing global market, the company decided to setup a commercial
website. For that, Contoso Inc. applied for a domain name and a network part to use for
assigning IP addresses to its existing server and workstations. The Registrar assigned the
Network Part 139.10 to the company. As the assistant of the network administrator at Contoso
Inc., you are responsible for assigning IP addresses to the company’s server and workstations.
Six workstations and the server are located in the Marketing department. The other workstations
are located in the Sales department. Based on your knowledge about Network parts, Segment
parts and Host parts, assign IP addresses so that we can easily know the location of a computer
based on its IP address.
Dept: Marketing
Host name: Workstation1
MAC: 00-04-F1-02-00-77
IP add:
Dept: Sales
Host name: Workstation2
MAC: 00-04-F1-02-00-78
IP add:
Dept: Marketing
Host name: Workstation3
MAC: 00-04-F1-02-00-79
IP add:
Dept: Sales
Host name: Workstation4
MAC: 00-04-F1-02-00-80
IP add:
Dept: Marketing
Host name: Workstation5
MAC: 00-04-F1-02-00-81
IP add:
Dept: Sales
Host name: Workstation6
MAC: 00-04-F1-02-00-84
IP add:
Dept: Marketing
Host name: Workstation7
MAC: 00-04-F1-02-00-85
IP add:
Dept: Sales
Host name: Workstation8
MAC: 00-04-F1-02-00-86
IP add:
Dept: Marketing
Host name: Workstation9
MAC: 00-04-F1-02-00-87
IP add:
Dept: Sales
Host name: Workstatio10
MAC: 00-04-F1-02-00-88
IP add:
Dept: Marketing
Host name: Workstatio11
MAC: 00-04-F1-02-00-89
IP add:
Dept: Marketing
Host name: Server1
MAC: 00-04-F1-02-00-83
IP add:
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Explanation: Here, all computers will have the same network part (139.10). You need to
decide what decimal to use as segment part for Marketing and what decimal to use for
Sales. Let’s say you decided that 11 will be used for Marketing and 12 will be used for
Sales. In this case, all computers in Marketing department will have an IP address that
begins with 139.10.11, plus a unique 4th decimal assigned to each computer in the
Marketing department. And all computers in Sales department will have an IP address
that begins with 139.10.12, plus a unique 4th decimal assigned to each computer in the Sales
department.
CIS 3200 Networking Fundamentals
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