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
(engineering, sales, IT, accounts and management) and number of hosts. Sales
department has 25 computers, engineering department has 51 computers,
accounts has 9 computers, management has 4 computers and IT department has
61 computers.
1- Identify the IP class.
2- Develop a subnetting scheme for department to reduce the number of wasted
IPs using VLSM.
Q2
Choose the right answer and write the correct answer.
1. A block in class C is probably ______for many big organizations.
a. too small b. too large c. both (a) and (b) d. none of the above
2. The International Organization for Standardization (ISO) created the ____
reference model in an attempt to standardize the design of communication
systems and the interoperability between their components.
a. OSI b. TCP/IP c. FTP d. ASCII
3. The _______ layer changes bits into electromagnetic signals.
a. Physical b. Data link c. Transport d. None of the above
4. What is the maximum number of IP addresses that can be assigned to hosts
on a local subnet that uses the 255.255.255.224 subnet mask.
a. 14 b. 15 c. 16 d. 30
5. 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
Q3
Answer briefly the following:
1- State two cases where simulation should be used.
2- State the main function for Cyclic Redundancy Check (CRC), in which OSI
layer it is added. Give a simple example.
3- State three types of networking simulators solutions.
D
r.A.Lateef