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):                      ………………………………….

 

 

 

Peepgrams


 

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.

  Use the Same diagram and perform this: 

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.

 Questions:


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?


Term Project Submission:









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