A group of questions for undergraduate students. The student can try to solve these questions in order to be ready for the final exam.

1. Q1
An administrator has 192.168.1.0/24 network with four different departments
(sales, purchase, accounts and management) with different number of hosts. Sales
department has 60 computers, purchase department has 30 computers, accounts
has 11 computers and Management has 5 computers.
1- Identify the IP class. How many host IPs can be used as subnet mask.
2- Develop a subnetting scheme for each department to reduce the number of
wasted IPs using VLSM.
Q2
Choose the right answer and write the correct answer.
1. You need to subnet a network that has 5 subnets, each with at least 16 hosts.
Which classful subnet mask would you use.
a. 255.255.255.192
b. 255.255.255.224
c. 255.255.255.240
d. 255.255.255.248
2. The network address of 172.16.0.0/19 provides how many subnets and
hosts.
a. 7 subnets, 30 hosts each
b. 8 subnets, 8,190 hosts each
c. 8 subnets, 2,046 hosts each
d. 7 subnets, 2,046 hosts each
3. The TCP/IP model consists of _______ layers.
a. Three b. Five c. Seven d. Eight
4. The _______ layer changes bits into electromagnetic signals.
a. Physical b. Data link c. Transport d. None of the above
5. In the OSI model, as a data packet moves from the lower to the upper
layers, headers are _______.
a. added b. removed c. rearranged d. modified
Q3
Answer briefly the following:
1- Difference between simulator and emulator.
2- State two cases where simulation should not be used.
3- Essential differences between LAN and WAN networks.
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