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Communication Systems IPT
HSC Communications Topic
23 cards·by Langers
Hub
common connection point for devices in a network, They're commonly used to connect segments
of a LAN.
Switch
a device that filters and forwards packets between LAN segments.
Bridges
a type of computer network device that provides interconnection with other networks that use
the same protocol.
Issues related to communication systems
Security, Globalisation, Changing nature of work, Interpersonal relationships, E-crime,
legal and virtual communities
Network Topologies
Bus, Ring, Star and Hybrid
Types of messaging systems
Email, Voicemail and VOIP (voice over internet protocol)
Application level of communication protocols
HTTP (Hyper Text Transfer Protocol) SMTP(Simple Mail Transfer protocol) SSL (Secure
Sockets Layer)
Control level of communications protocol
ICP (Internet Cache Protocol) IP (Internet Protocol)
Transmission level of communications protocol
Ethernet and Token Ring
Define SSL (Secure Sockets Layer)
is the standard security technology for establishing an encrypted link between a web server
and a browser.
Bus Network topology
nodes are directly connected to a common linear
Types of transmission media
Wireless, Wired and Satellite
Ring
network topology in which each node connects to exactly two other nodes, forming a single
continuous pathway for signals through each node
Star
A topology where every node is individually connected to a central point
Hybrid
A combination of network topologies working together
Types of network hardware
Hubs, Switches, routers, Modems, Bridges, Gateways, NIC (Network Interface Card), WAP
(Wireless Access Point) and bluetooth
Define Teleconferencing systems
It is a generic term for linking people between two or more locations by electronics. Examples
are audio, audiographic, computer, video, bus
Functions performed within a system
Message creation, Organisation of packets, Signal generation, Transmission,
Synchronising the exchange, Addressing and routing
Define Client Server model
a distributed application structure that partitions tasks or workloads between the
providers of a resource or service, called servers, and s
Information processes in communications systems
Collecting, Processing and displaying
Collecting in communications systems
Phone for voicemail and Eftpos terminal for electronic banking
Processing in communication systems
Encoding and decoding analog and digital signals, Data packets, Routing, Encryption +
decryption, Error checking paritybitcheck checksum CRC
Displaying in communication systems
Phone for voice mail, Eftpos terminal for electronic banking