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1.3 - Wired and Wireless Networks - Coggle Diagram
1.3 - Wired and Wireless Networks
Advantages of Networks
File sharing
Hardware sharing
Can do central maintenance and backups
Can do central security updates - antivirus / firewall
Communication : Emails, Zoom
Remote access
User monitoring
Levels of Access
Disadvantages of Networks
Cost - equipment and staffing
At greater risk of malware (can spread to more computers)
Hacking
Modes of connection
Protocols and Layers
IP and MAC addressing
Hardware for connection
Wireless Access Point (WAP)
Network Interface Card (NIC)
Router
Switch
Transmission Media
Wired
Ethernet
Twisted copper
Cheap
To 1Gbits
Up to 100m
Fibre Optic
Faster over 40Tbits
Uses light so is less likely to get interrupted
Expensive
Over 2km
Decreased interference
Less portability
Wireless
WiFi
Bluetooth
Portable
Greater interference
Hub
Factors affecting performance of network
Transmission Media
Number of devices
Bandwidth size
Type of network traffic e.g. word docs or images
Network latency
Number of transmission errors
Internet
Cloud
Advantages:
Can be accessed at any time
Files can be easily shared
Larger capacity and can be increased
Don't need specialist equipment or IT specialists
Disadvantages:
Needs internet to access
3rd party do security backups
Can be expensive for monthly fee
Hosting
The people responsible for storing files on a server
DNS (Domain Name Server)
Web servers and clients
It is the network infrastructure
that gives you access to the
WWW. It is a WAN
Web Server
Mail Servers
Media Servers
URL - Uniform Resource Locator
The web address typed in by a user
LAN vs WAN
Star and Mesh Topologies
Client-server vs Peer to Peer