CS University
Network Protocols and Communication
Practice Exercises & Quiz + correction
Exercise 01
You are given the address 192.172.1.0 , so let's break this network down into four subnetworks
with the first subnetwork containing 120 machines, the second 50 machines, the third 25 machines
and the fourth reserved for the company's servers (including the web server).
1. Give the mask(s), the address of each subnet and the broadcast address of each subnet. (Give
the answer in the form of a table).
2. Assuming that the four subnetworks are connected by router R1, and that the network is
connected to another network whose address is: 172.20.1.0/24, draw a diagram linking the 4
subnetworks together and the second network, specifying the hardware required and the
various addresses.
3. Give the routing table for R1.
4. Configure dynamic and static routing paths
5. Propose a solution so that the machines in the first three subnetworks can connect to the
Internet and Internet users can access the web server (assuming you have a single public
address).
, 6. If we want to break down the previous network (192.172.1.0) into four subnetworks, with the
size of the first being exactly five times larger than the other three, give the mask(s), the
address of each subnetwork and the broadcast address of each subnetwork. (Give the answer
in the form of a table).
Exercise 02
Company X's network administrator has just configured a network based on the addressing plan
and interconnection diagram below. It turns out that certain elements of the installation and
configuration are incorrect. He has asked you to help him find all the anomalies.
Your task is to find as many problems as possible. For each proposal, describe the error, justifying
your answer, and suggest an appropriate solution.
Exercise 03
Two sites A and B exchange messages with each other using the TCP protocol, assuming that :
- Electronic messaging uses the TCP/IP protocol.
- The message sent from A to B is 14 Kb in size.
- The message sent from B to A is 8 Kb in size.
Network Protocols and Communication
Practice Exercises & Quiz + correction
Exercise 01
You are given the address 192.172.1.0 , so let's break this network down into four subnetworks
with the first subnetwork containing 120 machines, the second 50 machines, the third 25 machines
and the fourth reserved for the company's servers (including the web server).
1. Give the mask(s), the address of each subnet and the broadcast address of each subnet. (Give
the answer in the form of a table).
2. Assuming that the four subnetworks are connected by router R1, and that the network is
connected to another network whose address is: 172.20.1.0/24, draw a diagram linking the 4
subnetworks together and the second network, specifying the hardware required and the
various addresses.
3. Give the routing table for R1.
4. Configure dynamic and static routing paths
5. Propose a solution so that the machines in the first three subnetworks can connect to the
Internet and Internet users can access the web server (assuming you have a single public
address).
, 6. If we want to break down the previous network (192.172.1.0) into four subnetworks, with the
size of the first being exactly five times larger than the other three, give the mask(s), the
address of each subnetwork and the broadcast address of each subnetwork. (Give the answer
in the form of a table).
Exercise 02
Company X's network administrator has just configured a network based on the addressing plan
and interconnection diagram below. It turns out that certain elements of the installation and
configuration are incorrect. He has asked you to help him find all the anomalies.
Your task is to find as many problems as possible. For each proposal, describe the error, justifying
your answer, and suggest an appropriate solution.
Exercise 03
Two sites A and B exchange messages with each other using the TCP protocol, assuming that :
- Electronic messaging uses the TCP/IP protocol.
- The message sent from A to B is 14 Kb in size.
- The message sent from B to A is 8 Kb in size.
