| Grading Criteria Page Number Met Grading Criteria Page Number Met Grading Criteria Page Number Met

P1.1 M1.3 D3.4 P1.2 M2.1 P1.3 M3.1 P2.1 P2.2

Tutor's comments Action required

Student's comments Unit 44: LAN Technologies Assignment 1 Scenario A college has two main operational sites which are five miles apart. With expansion, a new site is being developed particularly to cater for the Computing and Technology courses. This new site is almost ten miles from the two existing main sites. When ready, it will have "state of the art" technology, offering courses in the new fields of engineering and computing, particularly networking, data communications, wireless technology, multimedia and Games developments to name but a few courses. It is expected that the new site as shown below, called the "Technology Centre" will cater for approximately 500 students in the first instance but will expand rapidly. In the ground floor there will be a lecturer theatre catering for approximately 400 computers, with facilities available for students to plug in their wireless laptops if needed, in the first floor there will be 4 classrooms equipped with 20 computers, in the second floor 3 rooms for staff and administration with a capacity of 20 computers in each room. You are the network manager who has been called in to advise the college management on how to build a network for the new site and advise on future expansion plans. The network you propose for the new site will need to be connected to the other two sites of the college, and should cater for all the student curriculum needs, staff and support services requirements. Use the knowledge you have developed in studying the CCNA 1 & CCNA2 (Cisco Certified Network Associates) course and experience you gained in the class to answer all the following questions.

Tasks: 1- A- Wireless connectivity for computers is now well established and virtually all new laptops contain a Wi-Fi capability. Of the WLAN solutions that are available the IEEE 802.11 standard, often termed Wi-Fi has become the de-facto standard. Critically evaluate the IEEE 802.11 wireless standards and describe its limitation.

B- Dynamic Host Configuration Protocol1 (DHCP) is a protocol intended to enable machines (servers, game consols, etc) wishing to be "online" the ability to request Internet Protocol information from a DHCP server automatically. Critically evaluate the usage of DHCP for IPV4 and IPV6 networks. C- VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks (VLAN) on the whole local area network. To do this, VTP carries VLAN information to all the switches in a VTP domain. Critically evaluate the VTP when VTP can create unnecessary traffic. [P1.1]

2- Evaluate strengths and weaknesses for the following technologies when applied to network then critically analyse their limitation and assess what the possible alternatives could be. o Classful vs Classless routing protocols; o 802.1Q frame tagging.

o Quality of service: Voice over IP; Video Streaming; o How can VLAN help to improve traffic by separating voice and data traffic?

[P1.2]

3- Discuss the following LAN security concerns and how they can be used to protect the above Technology Centre network: o VLANs, o Switch port control, o MAC (Media Access Control), o Wireless security

o Firewalls, [P1.3] 4-

a- You are given IP address 180.16.0.0, subnet the network above and provide an IP addressing scheme (subnetting) for all the devices on the "Technology Centre" network in all the floors. b- What is most common situation, the clock being generated by ISP.

c- From the clock signal viewpoint, how are both ends of a serial link called? d- Is the clock signal also necessary on an asynchronous serial link? If not how is the data synchronized while travelling through such link . [M2.1] 5- In most cases, having the same subnet mask for all subnets ends up wasting address space wasted address space due to the fact that the same subnet mask is being used for all the subnets. Use the Variable Length Subnet Masks (VLSM) to address spaces efficiently and show in a table the wasted address spaces. [D3.4]

6- Green Inc. is expanding and just got another floor on the building they have their main office. The new floor will also need to be connected to Green's network and, because no hierarchy layers were used on the first network design they called you for help. Topology (original):

The Scenario: As shown on the topology above, no hierarchy design was used.

Problem 1 – Performance Within Green Inc. Network, network 1 users need to frequently access a database stored in Server 1. Network 2 users also frequently access a database stored in Server 2. You take a look on the topology handed to you (shown above) and, notice a few performance problems that could be easily solved by a better design. On the topology above, link A is saturated because of traffic from network 1 to server 1and to the Internet. Link B is also saturated because of traffic from network 2 to server 2 and to the Internet. Link C is heavily used because of traffic from network 1 and 2 to the servers and Link D is shared by all users and devices for traffic sent to the internet.

Problem 2 – Scalability Green's network doesn't scale easily at the moment. R1 router has no interfaces left and the S1 and S2 switches have all their ports taken. If a new network or department becomes necessary, the current topology won't accept it easily.

Problem 3 – Redundancy Green's has no backup links or equipment right now. If any of their links or devices fail, traffic forwarding disruption will occur. Some failures will cause bigger disruptions (a R1 router failure would stop the entire network) other will cause smaller disruptions (a Link A failure would stop network 1 operations) but traffic disruption would happen regardless. After analyzing Green's network problems, you need to design and create a new topology (no test or troubleshooting is required) based on the Hierarchical Model using Packet Tracer [P2.1]. Then address Green's network main problems above and provide solution to deliver performance, security, reliability, scalability and redundancy. [M3.1] You need to provide the exact name, made model, picture and the estimated total cost of all the network components you need in the new Hierarchical Green's network. Then critically evaluate the following factors influencing your choice of LAN components for the new Green's network - Bandwidth: expected average load; cost constraint; - Users: quality expectations, - Applications: security requirements, redundancy; - Scalability: able to cope with future expansions and trend change. [P2.2]

All the resources used in your assignment should be listed in the bibliography using the Harvard System of Indexing.

Unit 44: LAN Technologies Assignment 1

Contextualised Grading

Note: failure to complete a pass criterion may lead to failure of the entire unit.

M1.3: failure to meet the deadline for handing in this assignment as stated in the front sheet means that you have failed to make an effective judgement in organising your time effectively and therefore the assignment basically will be marked only for pass criteria. As you know even if you meet all the merit criteria and all the distinction criteria, if you fail to meet M1.3 your assignment will only be judged on the pass criteria. Furthermore, if you consult resources to answer the above questions, you need to provide references using the Harvard system of referencing. M2.1: Provide an IP addressing scheme for all the devices on the Technology Centre network, by subnetting the given IP address. M3.1: In task 6 you need to address Green's network main problems and provide solution to deliver performance, security, reliability, scalability and redundancy.

D3.4 Use the Variable Length Subnet Masks (VLSM) to address spaces efficiently and show in a table the wasted address spaces

BTEC L5 HND in Computing and Systems Development Unit 44: Networking Technology- L5- L/601/1547 Learning outcomes and assessment criteria

Outcomes To achieve a pass grade the evidence must show that the learner is able to: To achieve a merit grade the evidence must show that the learner is able to: To achieve a distinction grade the evidence must show that the learner is able to: LO1

Understand the impact. of LAN technologies P1.1 critically evaluate different LAN technologies M1.1 Effective judgement have been made D1.1 Conclusions have been arrived at through synthesis of ideas and have been justified P1.2 critically analyse traffic intensive services and their performance M1.2 An effective approach to study and research has been applied D1.2 Realistic improvements have been proposed against defined characteristics for success P1.3 discuss LAN concerns and make recommendations to sustain network security, reliability and performance M1.3 An effective approach to study and research has been applied LO2 Be able to design LAN

infrastructures P2.1 design a LAN infrastructure to meet a given requirement M2.1 Relevant thories and techniques have been applied. D2.1 Activities have been managed P2.2 critically evaluate the suitability of LAN components M2.3 The selection of methods and techniques has been justified D2.2 The importance of interdependence has been recognised and achieved LO3

Be able to implement LAN infrastructures P3.1 build and configure a LAN (including services) to meet a given requirement M3.1 The appropriate structure and approach has been used D3.1 Ideas have been generated and decisions taken P3.2 implement network security on a LAN M3.2 A range of methods of presentation have been used D3.4 Problems have been solved P3.3 critically review and test a LAN LO4

Be able to manage LAN infrastructures P4.1 monitor and troubleshoot a LAN P4.2 resolve LAN issues to improve security, reliability and performance P4.3 critically evaluate the performance of a LAN.