Networks & Applications

Task 1: Wireless Wide Area Networks (6 marks)

Using the Internet online services, learn the basic knowledge about wireless wide area network technologies, particularly for mobile phone and data services, and answer the following questions:

  1. What is the concept of a cellular network or system? Give a network example to illustrate this concept.
  2. What are the key differences between the Global System for Mobile Communications (GSM) network and the 3rd generation mobile telecommunications (3G) network standardized by 3GPP in their architecture?
  3. What are the radio transmission technologies used for the GSM and the 3G network in the physical layer respectively? What data rate can each network support?
  4. What is the facility used to achieve the mobility management (or roaming) in the GSM network? Does the 3G network use the same mobility management system equipped in the GSM?

Task 2: IP addresses allocation (4 marks)

A large number of consecutive IP addresses are available starting from 198.16.0.0. Suppose that four organizations, A, B, C and D, request 4000, 2000, and 4000, and 8000 addresses, respectively, and in that order. For each of these, give the first IP address assigned, the last IP address assigned, and mark in the  w.x.y.z/s notation (for example, 135. 46.56.0/22).

Task3: Subnet a network (5 marks)

Assume that you have purchased the IP network 213.45.32.0/20 from APNIC. Subnet this network so that all of the broadcast domains shown in the below diagram are allocated individual subnets. Create a table with the following headings which lists the subnets that you have created:

  • Location: e.g. LAN 1
  • Subnet Identity
  • Netmask
  • Range of Usable IP Addresses: give the range of usable IP addresses on this subnet, e.g. 1.2.0.1 to 1.2.0.254

In a separate table, allocate suitable IP addresses for every router and stations A, P and X. Remember, every port on a router has its own IP address. Allocate your own port numbers for each router. Do not put an IP address on Router 2’s port connected to the Internet, as it will get an IP address on this port from your ISP. Write the table out with the following headings:

  • Device: e.g. A, or Router 1 port 0.
  • IP Address

(Notes: the number of stations for each LAN is important for your answer now.)

Task 4: Routing with Packet Tracer (5 marks)

 Using the IP addresses from your subnetting, build the above diagram as shown in Packet Tracer. You will create and save a Packet Tracer scenario file in this task. Make sure that all devices and physical connections are represented in your scenario. Give the Internet, indicated in the diagram, the IP address of 131.200.0.0/16, and give Router 2’s Internet port the IP address 131.200.1.1/16.

Ensure that stations A, P and X can send packets to each other and to the Internet.

NOTES:

Your work for Task 4, saved as a Packet Tracer’s file.

 

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