ISYS111 Lecture Notes - Lecture 6: Asynchronous Transfer Mode, Synchronous Optical Networking, Internet Protocol Suite
17 Jun 2018
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C. Various technologies that enable users to send high-volume data over any
network
• Digital subscriber line (DSL) uses existing telephone lines to provide high-
speed data transmission
• Allows data and telephone transmissions over the same physical lines
• Asynchronous transfer mode (ATM) allows transmission of data, voice and
video at high speeds over a single communications line
• Synchronous optical network (SONET) utilises fibre-optic lines to carry large
volumes of data over very long distances
• T-carrier system is a digital transmission system that defines circuits that
operate at different rates, all of which are multiples of the basic 64Kbps used
to transport a single voice call
• Faster transmission lines are more expensive to use
D. Ethernet and TCP/IP protocols
• Ethernet is a LAN protocol used to transmit data at speeds varying from 10
gigabits per second to 100 gigabits per second
• Most common protocol used in LANs
• TCP/IP is the protocol used by the internet
• TCP manages the packets (small, fixed bundles of data as they travel between
computers), ensures the packets are in the correct sequence, acknowledges
that the packets have been transmitted
• The IP protocol disassembles, delivers and reassembles the data during
transmission
E. Differentiate between client/server computing and peer-to-peer processing
• Client/server computing connects two or more computers in a network
• Server computers are called servers and they provide programs and data to
other computers called clients
• Servers control what data can be accessed by which computers
• Server computers are "in control" of the network
• In peer-to-peer networks, each computer is equal, acting as both a server and
a client computer
• All computers on the network can access all of the files and data found on
any computer on the network
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