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Fundamentals of Network Elements

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SECTION 1: GENERAL QUESTIONS (Q1-Q4)
Q1: How many LANs and WANs are forming the enterprise network?
LANs: __________ WANs: _____________
Q2: How many subnetworks do you see? Answer: __________ subnetworks
List the subnetworks:
Q3: When PC1 communicates with Server 1, how many data links a message has to go through?
Answer: __________ data links
When PC1 communicates with Server 1, how many physical links a message has to go through?
Answer: __________ physical links
When PC1 communicates with Server 3, how many data links a message has to go through?
Answer: __________ data links
When PC7 communicates with Server 2, how many different routes a message can take?
Answer: __________ routes
Q4: What physical topology is used to interconnect the four routers? ____________________
SECTION 2: NOW, CREATE ALL NETWORK NODES (PCS, SERVERS, ROUTERS, AND SWITCHES) ON PACKET TRACER. NO CABLING YET.
CHANGE ALL LABELS OF NETWORK NODES AS IN THE FIGURE.
Questions (Q5-Q12) based on the R2 (1841 Router) in “out-of-the-box condition”.
Q5: How may Ethernet ports does the 1841 router have initially? Answer: __________
Q6: What are the port (interface) names assigned to the Ethernet ports?
Answer:
Q7: What are MAC addresses of Ethernet ports (or LAN ports)? Do not worry about VLAN1 now.
Q8: How may WAN ports (also called Serial ports) does the router have? Answer: _________
Q9: Do LAN/WAN ports have an IP address? Answer: _________
Q10: Are LAN/WAN ports currently up or down? Answer: _________
Q11: How many empty slots are available on the router to allow additional installation of LAN/WAN cards?
Answer: __________
Q12: What is the name of module (or network card) whose installation allows addition of an Ethernet LAN port to the router?
Answer: __________
Questions (Q13-Q20) based on the SW6 (2950-24 Switch) in “out-of-the-box condition”
Q13: How many Ethernet switch ports does it come with? Answer: __________
Q14: What are the names assigned to the Ethernet ports? (List the first three)
Answer:
Q15: How many MAC addresses are assigned to each switch port? Answer: __________
Q16: Are Ethernet switch ports (LAN ports) currently up or down? Answer: __________
Q17: Are there empty slots available to allow additional installation of LAN cards?
Answer: __________
Q18: All switch ports are initially assigned to one so called VLAN (or virtual LAN) when the switch is in the out-of-the-box condition. What is the VLAN ID assigned to all switch ports?
Answer: __________
Q19: What are MAC addresses of the first three switch ports?
Answer:
Q20: Manually translate the three MAC addresses in Q19 into 48-bit binary.
SECTION 3: START NETWORK CABLING BASED ON INSTRUCTIONS BELOW:
Complete the cabling between nodes as in Figure 1. If there are no serial ports necessary for WAN connections on the router, WAN cards (WICs) have to be installed. The network administrator decided to use the WIC-2T WAN card among many choices.
 Install the WIC-2T WAN network cards to all available router slots.
 Use following cabling to interconnect nodes.
LAN cabling: Use either copper straight-through or copper cross-over cabling.
Straight through cabling is used to connect different devices (ex. PC –switch, switch – router). Connecting similar devices (ex. switch – switch) needs cross-over cabling. Do NOT use the automatically choose connection type option. LAN links are shown in black.
WAN cabling: Serial lines should be used for the WAN connection. Choose the Serial DCE cable option that supports clocking (One end of the WAN connection needs to have clocking to regulate transmission speed). WAN links are shown in red.
 Note: When wrong ports are chosen for cabling, there will be an error message “This cable cannot be connected to the port”. When cabling is correctly done, you should see two small dots in red on both ends of the cable. If you see the dot only on one end of the connection, the cabling is incorrect. The red dots between computers and switches change to green automatically after a while indicating readiness for message exchange. Meanwhile, you will find that any cabling that involves a router port will remain in red. This means that, although the physical connection has been completed, additional router configuration is necessary in order to exchange messages via the router port.
Completing the network cabling, therefore, does not mean that end devices (PC stations and servers) can communicate because routers have not been configured. Switches do not need additional configuration to enable the switch port function. Once cabling is complete, answer following questions:
Questions (Q21-Q31) based on Router R1:
Q21: List all names (identifiers) of LAN and WAN ports (again no worry on VLAN):
Ports
List
LAN (Ethernet)
WAN (Serial)
Q22: How many LAN ports (interfaces) are physically connected? Answer: __________
Q23: What is the name of the LAN port being connected?
Answer:
Q24: What is the speed of R1’s LAN port? Answer: __________
Q25: What is the MAC address of R1’s LAN port in use? Answer: ______________________
Q26: How many WAN ports (interfaces) are physically connected? Answer: __________
Q27: List the name of the WAN ports being connected.
Ports
Names
WAN (Serial)
Q28: Do we know the speed of the WAN ports? Yes [ ], No[ ]
Q29: Does the WAN port have a unique MAC address? Yes [ ], No[ ]
Q30: Is any of the LAN and WAN ports active? Yes [ ], No[ ]
If not, explain the reason:
Answer:
Q31: Create a console connection from PC1 to R1 for router configuration. What is the PC1 port used to connect to the R1’s console port? Make sure to choose the console cable, not LAN cable.
Answer: ______________
Once console connection is made, click on R1 and zoom in the ‘physical device view’ and observe the shape of the console port. The console port resembles (literally identical) the:
LAN port [ ] or Serial port [ ]
Questions (Q32-Q40) based on Switch SW2:
Q32: List the names (identifiers) of the LAN ports being connected.
Answer:
.
Q33: What are MAC addresses of ports being connected? Fill out the table.
Ports
MAC addresses
Q34: Manually convert all connected MAC addresses into 48bit binary combination.
MAC addresses Binary combinations
Q35: Among the connected ports, which ports are in the ‘up’ state? List them.
Answer:
Q36: Among the connected ports, which port is in the ‘down’ state?
Why do you think that particular port is down when others are up? Explain.
Answer:
Q37: How many ports are still unused and therefore available for additional connection? (Again do not count
VLAN) Answer: _____________
SECTION 4: CONFIGURATION OF ROUTER PORTS AND THEIR ACTIVATION.
 Assume that the Headquarter network IP is 192.168.0.x. Then, configure PC1 with an IP address of
192.168.0.1 and subnet mask of 255.255.255.0. Also, configure Server1 with an IP address of 192.168.0.2 and subnet mask of 255.255.255.0. With the configuration, both PC1 and Server1 belong to the same subnetwork.  Click on R1 and then Config tab (see Figure 2 for sample screen). Then, among the interfaces (ports) on the side bar (within the red square), click on the port that connects Switch 2 (therefore, connects the
Headquarter network). Then, activate the port by clicking the ‘Port Status’ and entering the IP address of
192.168.0.250. Leave the choice of ‘Bandwidth’ and ‘Duplex’ to the default (auto) value. Then, wait for a moment until the port changes to green on the network.
Figure 2. Router port configuration window
Q38: Open the Command Prompt (for Command Line Interface) on PC1. At the prompt, issue ‘ping 192.168.0.2’. Answer following questions
 Was pinging successful? Yes [ ], No[ ]
 How many ping responses are received? Answer: _____________
 If pinging was not successful, troubleshoot the problem.
 Briefly explain the meaning of successful pinging?
Answer:
Q39: At the Command Prompt of PC1, issue ‘ping 192.168.0.250’.
 Was pinging successful? Yes [ ], No[ ]
 Briefly explain the meaning of successful pinging?
Answer:
Q40: Are all connected ports of SW2 in ‘up’ state? Yes [ ], No[ ]
Briefly explain why the change from Q30?
Answer:
Congratulations, you just completed this assignment! Save the Packet Tracer work.

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