Computer
Communication and Networks
OBJECTIVES:
1.
Concept Builder Lab: Hub and Switch Usage
2. To become familiar with
Packet Tracer
|
Lab Performance |
|||
|
No. |
Title |
Marks |
Obtained Marks |
|
1 |
Ability to
Solve Problems |
10 |
|
|
2 |
Implementation
of skills |
10 |
|
Remarks (if any): ………………………………….
Scenario
These topologies
represent the simplest hub-based and switch-based networks, ideal for studying
the different processes between hubs and switches.
Step 1
Add a generic hub and three
generic PCs and arrange them as shown in the image.
Add a 2950-24 switch and three
generic PCs and arrange them as shown in the image.
Step 2
Connect the devices as shown in
the image. Use the appropriate connection type for each link.
Step 3
Set the IP address and subnet mask
for the PCs as follows:
|
PC |
IP Address |
Subnet Mask |
|
PC0 |
192.168.1.1 |
255.255.255.0 |
|
PC1 |
192.168.1.2 |
255.255.255.0 |
|
PC2 |
192.168.1.3 |
255.255.255.0 |
|
PC3 |
192.168.2.1 |
255.255.255.0 |
|
PC4 |
192.168.2.2 |
255.255.255.0 |
|
PC5 |
192.168.2.3 |
255.255.255.0 |
Step 4
If all
connections and addressing are correct, the link lights should be green. If
not, troubleshoot the cabling type, connections, and addressing.
Reflect:
1)
Go to Simulation mode. In the Event List filters,
enable only ICMP and ARP. Using the “Simple PDU”, issue a ping from PC0 to PC1.
Play the simulation. Pay close attention to how the hub processes the ICMP and
ARP packets. After that, once again, use”Add Simple PDU” to issue a ping from
PC1 to PC0. Play the simulation again. How has the behavior of the hub changed
from the first and second ping attempts, if at
all?
2)
Still in Simulation mode, in the Event List Filters,
enable only ICMP and ARP. Using “Add Simple PDU”, issue a ping from PC3 to PC4.
Play the simulation. Pay close attention to how the switch processes the ICMP and
ARP packets. After that, once again,
use “Add Simple PDU” to issue a ping from PC4 to PC3. Play the simulation
again. How has the behavior of the switch changed from the first and second
ping attempts, if at all? In what ways did the switch process the packets
similarly or differently from the hub between the first and second ping attempts?
For the switched based network,
set the new IP address and subnet mask for the PCs as follows:
|
PC |
IP Address |
Subnet Mask |
|
PC0 |
192.168.1.36 |
255.255.255.224 |
|
PC1 |
192.168.1.37 |
255.255.255.224 |
|
PC2 |
192.168.1.38 |
255.255.255.224 |
|
PC3 |
192.168.1.91 |
255.255.255.224 |
If all
connections and addressing are correct, the link lights should be green. If
not, troubleshoot the cabling type, connections, and addressing.
In this scenario, all computers are communicated
or not…? If not, what is the reason?
Quiz Task 1:
Send a ping command for both HUB
and SWITCH network using command prompt in
Packet Tracer and notice the
results in Simulation mode.
Step 1 Open the PT activity file then
add a 2950 Switch and four generic PCs. Arrange them as shown in the above
figure.
Step 2 Connect the devices using the appropriate connection type for each link.
Step 3 Using the Config tab, configure the IP address and subnet mask for each PC as shown in the following table:
|
PC |
IP Address |
Subnet Mask |
|
PC0 |
172.16.128.1 |
255.255.192.0 |
|
PC1 |
172.16.128.2 |
255.255.192.0 |
|
PC2 |
172.16.128.3 |
255.255.192.0 |
|
PC3 |
172.16.128.4 |
255.255.192.0 |
Step 4 Verify that the connections are correct. At this point, all link lights should be green.
Step 5 Change the bandwidth on PC0 to
10 Mbps and set the duplex settings to full instead of Auto.
Notice that the connection
immediately goes down.
To bring it back
up again, change the bandwidth and the duplex settings of the switch's Ethernet
port to match the current settings of PC0.
1)
Explain why the connection fails if the bandwidth or duplex settings
for the devices
do not match.
2)
If a device
is configured with bandwidth and duplex settings
on automatic, does the
device at the other end of the connection have to be set to automatic as well?
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