unit 11: computer networkswiki.computing.hct.ac.uk/.../level2/01-network_uses... · types of...
TRANSCRIPT
Unit 11: Computer Networks
Features of Networks
Network Topologies, Types
Aims
Mind map the uses of computer networks
Different types of Networks
Understand computer Network Topologies
Create network drawings
Uses of Computer Networks
Communication:
Sharing hardware:
Exchanging information:
Multi-user:
Storage:
Applications:
Create a Mind map using Visio of the examples
Mind map 1 must include:Communication: email, instant messaging, social networking, blogs, forums, wikis, web conferencing
Sharing hardware: printers, scanner, processing
Exchanging information: files, data, photos/images, videos
Multi-user: gaming, collaborative working
Storage: files, data centres, back-up
Applications: online databases, spreadsheets, intranet, extranet
Mind map 2 - good Networks must have:
Workable speed, view videos, load documents
Share information securely
Backing up
Accurate record keeping, audit, tracking
Keeping individuals informed
Aid collaborative working
Play computer games in a multi-player gaming environment.
Types of NetworkLAN (Local area network)
The definition of a LAN has become increasingly vague over the last ten years.
It was understood that it was interconnected computers at one location i.e. college or a workplace.
Know due to faster technology LAN devices can be used over longer distances.
A LAN can be as small as two computers by using a simple Ethernet connection or can divided into sub networks using switches and routers.
Task
Using Visio try to recreate the LAN shown below. (Feel free to make it your own)
WAN
Types of NetworkWAN (Wide area network)
A WAN is a complex network system, comprising of interconnected LANs.
WANs are used to connect LANs and other types of networks together, so that users and computers in one location can communicate with users and computers in other locations.
Network protocols including TCP/IP deliver transport and addressing functions.
What is TCP/IPIP – Internet Protocol
moving of data packets between nodes
TCP – Transmission Control Protocolverifying delivery of the packets
Packetssmall amount of computer data sent over a network
TCP/IP software is built into all major operating systems, such as Unix, Windows, and the Mac OS.
Types of NetworkMAN (Metropolitan area networks)
Large computer network that spans a metropolitan area or campus. The network size falls intermediate between LANs and WANs.
MANs provide Internet connectivity for LANs in a metropolitan region, and connect them to wider area networks like the Internet.
They typically use wireless infrastructure or optical fibre connections to link their sites.
A MAN (like a WAN) is not generally owned by a single organisation.
The MAN, its communications links and equipment are generally owned by either a consortium of users or by a network service provider who sells the service to the users.
Task
Using the internet look into what a packet is
Provide description of TCP/IP
Create a network diagram in Visio to represent “SuperJanet”.
Types of NetworkPAN network
A personal area network
A computer network for an individual person.
PANs generally cover a range of less than 10 meters (about 30 feet).
PANs are a subset of local area network (LAN) that supports one person
instead of a group.
Conclusion
Considered the purpose of a computer network
Revised some of the different types of networks
Used Visio to create network diagrams
Gained an understanding of a Packet and TCP/IP