To provide learners with an understanding of Local Area Network (LAN) technologies and the delivery of a wide range of networked services across a LAN infrastructure.
LANs have become ubiquitous in all but the smallest of enterprises and their implementation has become the realm of skilled designers if the best advantage is to be made of available technology. Whist it is now the case that simple networks can often been installed by users with little previous knowledge, the design, implementation, testing and management of extended LANs requires considerable technical knowledge.
The impact of LANs across an organisation can require upskilling of staff, changes to the physical environment and changes to commercial procedures. It also requires changes to the access, security and ownership of the data which passes across the LAN. In this unit learners will understand that consideration must be given to not only the physical LAN but the organisational culture as a whole.
Learners will understand the importance of considering both physical and logical environments including network addressing, best use of media, and network segmentation. Learners will also study Quality of Service (QoS) in order to best manage the network traffic. Once a LAN is installed and operational learners will study methods of measuring and maintaining performance in a proactive manner using a range of tools.
On successful completion of this unit a learner will:
LO1- Understand the impact of LAN technologies
LO2 -Be able to design LAN infrastructures
LO3- Be able to implement LAN infrastructures
LO4- Be able to manage LAN infrastructures.
1 Understand the impact of LAN technologies
LAN technologies: standards e.g. IEEE 802 LAN standards, IEEE 802.11 wireless standards, STP (Spanning Tree Protocol), VLANs (Virtual LAN), VTP (VLAN Trunking Protocol), standby routing, ether channel, ISL (Inter Switch Link), DHCP (Dynamic Host Configuration Protocol); LAN hardware: e.g. layer 2 switches, layer 3 switches, layer 4 switches, wireless devices, network interfaces, client devices
Traffic intensive services: quality of service management e.g. DSCP (Differentiated Service Code Point), IP precedence, queues, base rules, 802.1q frame tagging; quality of service need e.g. Voice over IP, video streaming, audio streaming;
LAN security: security need e.g. VLANs, switch port control, ACLs (Access Control Lists), MACACL’s, MAC (Media Access Control) address filtering, wireless security, port spanning
2 Be able to design LAN infrastructures
Devices: expected average number and types of devices on system; anticipated participation Bandwidth: expected average load; anticipated peak load; cost constraint
Users: quality expectations, concept of system growth
Applications: security requirements, quality of service needs, redundancy Communications: suited to devices, suited to users, supportive of quality of service
Scalable: able to support device growth, able to support addition of communication devices, able to cope with bandwidth use and trend change
Security: device access, VLAN membership, traffic management, system monitoring
Traffic intensive services: application of rules, prioritisation
Technology: VLAN design, STP design, DHCP address allocation design, wireless infrastructure design
3 Be able to implement LAN infrastructures
Devices:installation of communication device, allocation of addresses, local client configuration
Services: directory, authentication, DNS (Domain Name Service), email, network file, printing
Specialised configuration: VLAN, VTP, standby, ether channel, STP
Security: ACLs, VLAN membership
Traffic management: system monitoring, traffic intensive services, traffic precedence
Connectivity: suitable bandwidth, cabling, wireless infrastructure
Testing: external access eg WAN access, access to internet; security; bandwidth
4 Be able to manage LAN infrastructures
LAN performance: network monitoring tools, user access, traffic analysis, bandwidth monitoring, checking configuration, checking rules
Ø You must ensure that all external sources used to provide evidence in your work must be referenced accordingly to avoid plagiarism and collusion
Ø All work should be comprehensively referenced and all sources must be fully acknowledged, such as books and journals, websites (include the date of visit)
Ø You must use correct and consistent Harvard referencing style
Ø A full reference list should be at the end of the assignment, and should start on a new page labelled 'References' or ‘Reference List’
Ø Do not include a ‘Bibliography’
Ø Use for information that is too long to include in the body of your assignment
Ø Use for information that supplements or complements the information you are providing
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