ITC233 Computer Networks Assignment

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Reference no: EM132518924

ITC233 Computer Networks - Charles Sturt University

Learning outcome 1: be able to explain the critical concepts in Local Area Networks;
Learning outcome 2: be able to describe and design the addressing and naming schemes of data networks;
Learning outcome 3: be able to analyse the communication processes across different levels in the layered architecture;
Learning outcome 4: be able to design, calculate and apply subnetting in IP networks;
Learning outcome 5: be able to perform and analyse tasks related to basic network configuration and testing.

Assessment item - Theory and Simulation Exercises

Question 1:
(a) The OSI protocol stack includes Session and Presentation layers in addition to its Application layer. TCP/IP applications, such as Telnet and FTP, have no such separate layers defined. Do you think that such a separation should be made? Give some advantages and disadvantages of incorporating the OSI approach into TCP/IP.

(b) Show the calculations for finding the estimated percentages of overhead for TCP/IP protocol for IPv4 and IPv6 versions.

Question 2:

(a) What difference does it make to the network layer if the underlying data link layer provides a connection-oriented service versus a connectionless service?
(b) Suppose transmission channels become virtually error-free. Is the data link layer still needed?
(c) Four levels of addresses are used in the TCP/IP protocol: physical address, logical address, port address, and application-specific address. Discuss the different types of addresses used in the TCP/IP protocol.

Part B:

Here you will be designing and implementing a VLSM addressing scheme. Please submit necessary screenshots in the document to prove your work, and also submit the packet tracer file.

Consider the topology below:

Background / Scenario
Variable Length Subnet Mask (VLSM) was designed to avoid wasting IP addresses. With VLSM, a network is subnetted and then re-subnetted. This process can be repeated multiple times to create subnets of various sizes based on the number of hosts required in each subnet. Effective use of VLSM requires address planning.

Use the 172.XX.YY.0/17 network address to develop an addressing scheme for the network displayed in the topology diagram. In place of XX and YY use the last 4 digits of your student ID. For example, if your student ID is 12345678, the IP address you will be using is 172.56.78.0/17. VLSM is used to meet the IPv4 addressing requirements. After you have designed the VLSM address scheme, you will configure the interfaces on the routers with the appropriate IP address information using the Packet Tracer software.

There are two parts-

PART 1: Design the VLSM Address Scheme

For this part, please follow the following two steps:

Step 1: Calculate the subnet information

Subnet Description	Number of Hosts Needed	Network Address/ CIDR	First Usable Host Address	Broadcast Address
LAN A
LAN B
LAN C
LAN D
LAN E
LAN F
WAN A
WAN B
WAN C

Step 2: Complete the device interface address table.

Assign the first host address in the subnet to the Ethernet interfaces. HQ should be given the first host address on the Serial links to BR1 and BR2. BR1 should be given the first host address for the serial link to BR2.

Device	Interface	IP address	Subnet Mask	Device Interface
HQ Router
BR1 Router
BR2 Router

PART 2: Create the topology in Packet Tracer and Configure the IPv4 Network

In this part, you will create the topology using the packet tracer software and configure the three routers using the VLSM address scheme that you developed in the previous part.

Step 1: create the topology using the packet tracer software

Step 2: Configure basic settings on each router.
a. Assign the device name to the router.
b. Disable DNS lookup to prevent the router from attempting to translate incorrectly entered commands as though they were hostnames.
c. Assign class as the privileged EXEC encrypted password.
d. Assign cisco as the console password and enable login.
e. Assign cisco as the VTY password and enable login.
f. Encrypt the clear text passwords.
g. Create a banner that will warn anyone accessing the device that unauthorized access is prohibited.

Step 3: Configure the interfaces on each router.
a. Assign an IP address and subnet mask to each interface using the table that you completed in Part 2.
b. Configure an interface description for each interface.
c. Set the clocking rate on all DCE serial interfaces to 128000.
d. Activate the interfaces.

Step 4: Save the configuration on all devices.

Step 5: Test Connectivity.
a. From HQ, ping BR1's S0/0/0 interface address.
b. From HQ, ping BR2's S0/0/1 interface address.
c. From BR1, ping BR2's S0/0/0 interface address.

d. Troubleshoot connectivity issues if pings were not successful.

Attachment:- Computer Networks.rar

Reference no: EM132518924

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