computer eng

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CNIT 345 - Weekly Assessment 1 – Spring2 2020

Upload the word file on Moodle through the Online Weekly Assessment 1 submission

link.

Part 1: Weekly Assessment for class. Part 2: Weekly assessment for lab.

Online Weekly Assessment 1 (Weight 10%) should be done individually.

Submission by: 07/07/2020

Problem

Part 1:

1. A supernet has a first address of 205.17.64.0 and a supernet mask of 255.255.224.0.

a. How many blocks are in this supernet and what is the range of addresses of each

block? (15 points)

b. A router receives three packets with the following destination addresses:

 205.17.129.44

 205.17.128.56

 205.17.33.76

Which packet belongs to the supernet? (10 points)

2. Consider the network depicted in the figure below. The IP addresses and MAC addresses of individual interfaces are as denoted in the figure.

Suppose that the sender host PC-B with the IP address 10.10.30.1/24 wants to send an IP

datagram to the receiver host PC-A with IP address 10.10.10.1/24. Answer the following

questions.

a. What is the source and the destination MAC address of the frame when it leaves the PC-

B? (2.5 points)

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b. What is the source and the destination MAC address of the frame when it leaves the

switch S1? (2.5 points)

c. What is the source and the destination IP address of the packet when it leaves the router

R3? (2.5 points)

d. What is the source and the destination MAC address of the frame when it leaves the

router R2? (2.5 points)

e. What is the source and the destination MAC address of the frame when it leaves the

router R1? (2.5 points)

Suppose now that the host PC-A wants to reply to host PC-B.

f. What is the source and the destination IP address of the packet when it leaves R2? (2.5

points)

g. What is the source and the destination MAC address of the frame when it leaves R1? (2.5

points)

h. What is the source and the destination MAC address of the frame when it leaves the

router R2? (2.5 points)

i. What is the source and the destination MAC address of the frame when it leaves the

router R3? (2.5 points)

j. What is the source and the destination MAC address of the frame when it leaves the

switch S1? (2.5 points)

Part 2:

Perform the following on packet tracer.

Task 1. Create a network as shown in the following topology. [5 Points]

Figure 1 OSPF topology

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Solution: Provide the screenshot of the topology

Task 2: Assign IP address for all devices and interfaces in the network. [10 points]

Device Interface IP address Subnet mask Gateway(if any)

R1 Gig0/0

Se0/2/0

Se0/2/1

R2 Gig0/0

S0/2/0

S0/2/1

R3 Gig0/0

S0/2/0

S0/2/1

PC0 NIC

PC1 NIC

PC2 NIC

PC3 NIC

Task 3: Configure Interfaces based on IP addresses you assigned in Task2. [10 points]

Solution: Provide the screenshot of your configuration

Task 4: Configure OSPF in routers R2 and R3. [15 points]

Solution: Provide the screenshot of your configuration

Task 5: Are all PCs in the network topology able to ping each other? Justify. [10 points]

Solution: Provide the screenshots (from all PCs) to show that your network is working properly