Building a small network in a network simulator

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Building a small network in a network simulator

Name:
Date:
Class:
A

Quick Questions

Shade in the A or B circle for each question.

1. In a network simulator like Filius, what do you do first when building a small network?
A Send a ping before any devices are added
B Place the computers, a switch and a router on the workspace
2. Which device do you add so several computers on the same LAN can be cabled together?
A A web browser
B A switch
3. Two computers are on the same network. Which pair of settings is correct?
A 192.168.1.10 and 192.168.1.11, both with mask 255.255.255.0
B 192.168.1.10 and 192.168.2.11, both with mask 255.255.255.0
4. What must each computer in your simulated network have set before it can be tested?
A An IP address and a subnet mask
B A username and a padlock icon
5. Why do you send a test ping in the simulator?
A To check that one device can reach another
B To give a device a new IP address
B

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left columnRight column
1ping 192.168.1.20 A192.168.1.10 and 192.168.1.20 with mask 255.255.255.0
2255.255.255.0 BPC2 has the wrong network part (192.168.5), so it is not on the same network as PC1 and the ping fails. Change it to 192.168.1.20.
3Give a simulated computer an IP address so it can be found on the network CSends a test message from one simulated computer to another to check that they can reach each other
4Devices on the same small network share the first three numbers of their IP addresses and use the same mask DA subnet mask you set on each simulated device so it knows which addresses are on its own network
5PC1: 192.168.1.10 / 255.255.255.0 and PC2: 192.168.5.20 / 255.255.255.0 EIP address: 192.168.1.10
6PC1: 192.168.1.10 / 255.255.255.0 and PC2: 192.168.1.20 / 255.0.0.0 FPC2 has a different subnet mask from PC1, so the two devices disagree about which network they are on. Change the mask to 255.255.255.0.
C

Definitions

network simulator
D

Fill in the Blanks

Complete each line of code by filling in the missing parts.

1.
add ________ PC1 add switch S1 connect PC1 S1
2.
add switch S1 add ______ R1 connect S1 R1
3.
set PC1 ip 192.168.1.10 set PC1 ____ 255.255.255.0
4.
set PC1 ip 192.168.1.10 set PC2 ip 192.168.1.11 ____ 192.168.1.11
5.
PC1: 192.168.1.10 / 255.255.255.0 PC2: 192.168._.11 / 255.255.255.0 ping 192.168.1.10
E

Spot the Error

Shade in the letter of the line that contains an error.

Question 1
A add computer PC1
B set PC1 ip 192.168.1.256
C set PC1 mask 255.255.255.0
Question 2
A add computer PC1
B add computer PC2
C add switch SW1
D connect PC1 to SW2
E connect PC2 to SW1
Question 3
A add computer PC1
B add computer PC2
C set PC1 ip 192.168.1.11
D set PC2 ip 192.168.1.11
Question 4
A PC1 ip 192.168.1.10 /24
B PC2 ip 192.168.1.20 /24
C ping from PC1 to 192.168.2.20
Question 5
A add router R1
B set R1 ip 192.168.5.1
C set PC1 gateway 192.168.1.1

Answer Key

Building a small network in a network simulator
Section A: Quick Questions
Q1
B — Place the computers, a switch and a router on the workspace
Q2
B — A switch
Q3
A — 192.168.1.10 and 192.168.1.11, both with mask 255.255.255.0
Q4
A — An IP address and a subnet mask
Q5
A — To check that one device can reach another
Section B: Match the Pairs
Q1
ping 192.168.1.20 → Sends a test message from one simulated computer to another to check that they can reach each other
Q2
255.255.255.0 → A subnet mask you set on each simulated device so it knows which addresses are on its own network
Q3
Give a simulated computer an IP address so it can be found on the network → IP address: 192.168.1.10
Q4
Devices on the same small network share the first three numbers of their IP addresses and use the same mask → 192.168.1.10 and 192.168.1.20 with mask 255.255.255.0
Q5
PC1: 192.168.1.10 / 255.255.255.0 and PC2: 192.168.5.20 / 255.255.255.0 → PC2 has the wrong network part (192.168.5), so it is not on the same network as PC1 and the ping fails. Change it to 192.168.1.20.
Q6
PC1: 192.168.1.10 / 255.255.255.0 and PC2: 192.168.1.20 / 255.0.0.0 → PC2 has a different subnet mask from PC1, so the two devices disagree about which network they are on. Change the mask to 255.255.255.0.
Section C: Definitions
Q1
network simulator — Software like Filius where you place devices, set each IP address and subnet mask, connect them with cables, then send a ping to test they can reach each other.
Section D: Fill in the Blanks
Q1
add computer PC1 add switch S1 connect PC1 S1
Q2
add switch S1 add router R1 connect S1 R1
Q3
set PC1 ip 192.168.1.10 set PC1 mask 255.255.255.0
Q4
set PC1 ip 192.168.1.10 set PC2 ip 192.168.1.11 ping 192.168.1.11
Q5
PC1: 192.168.1.10 / 255.255.255.0 PC2: 192.168.1.11 / 255.255.255.0 ping 192.168.1.10
Section E: Spot the Error
Q1
B — Each part of an IPv4 address must be 0 to 255, so 256 is invalid. The line should be set PC1 ip 192.168.1.10.
Q2
D — Only one switch, SW1, was added, so PC1 cannot be cabled to SW2. It should be connect PC1 to SW1.
Q3
C — PC1 now has the same IP address as PC2, which causes an address conflict. Each device needs its own address, so PC1 should be 192.168.1.10.
Q4
C — PC2's address is 192.168.1.20, not 192.168.2.20. Pinging the wrong address means no reply. It should be ping from PC1 to 192.168.1.20.
Q5
B — The router address must be on the same network as PC1 and match the gateway set on PC1. It should be set R1 ip 192.168.1.1.