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console port
Port on Cisco devices to which a terminal or computer with a terminal emulator is connected to the network device in order to communicate and configure the network device.
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CSU/DSU
Channel Service Unit / Data Service Unit
Device that connects a local digital phone loop for a WAN circuit to a serial interface on a network device (typically a router).
Performs physical layer layer1 signaling on WAN circuits.
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DCE
Data Communications Equipment
Devices and connections of a communications network that comprise the network end of the user-to-network interface.
- Physical connection to the network
- Forwards traffic
- Provides clocking signal used to synch data transmissions between DTE & DCE
Ex: modems, Interface cards, etc...
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DTE
Data Terminal Equipment
Device at the user end of a user-network interface serving as a data source, destination or both.
Ex: computers, protocol translators, multiplexers, etc...
Connects data network through a DCE device (modem) and uses clocking signals generated by DCE.
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EMI
Electromagnetic Interference
Interference by magnetic signals caused by the flow of electricity.
Causes reduced data integrity and increased error rates on transmission channels.
{ The electrical current creates magnetic fields, which in turn cause other electrical current in nearby wires. Induced electrical currents can interfere with proper operation of the other wire. }
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fiber-optics
Glass fibers inside certain cables over which light is transmitted to encode 1s & 0s.
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MDI
Media-Dependent Interface
Normal mode of operation of Ethernet ports on hubs .
Mapping of the wire pairs used in the hub port is a normal config.
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MDIX
Media-Dependent Interface, Crossover
Alternative operation of Ethernet ports on a hub.
Mapping of the wire pairs used on the hub port is a crossover config. that allows for the use of a straight-through cable. (interconnects a hub to a hub)
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RFI
Radio Frequency Interference
Radio frequencies that create noise that interferes with information being transmitted across unshielded copper cabling (UTP).
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terminal emulator
Application that runs a terminal for a remote host such as a router, switch, etc.
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Winchester connector
34-pin female v.35 serial cable conector
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