Week 3 Flashcards
What does the ANSI/TIA-568 Commercial Building Wiring Standard describe?
the ANSI/TIA-568 Commercial Building Wiring Standard describes the best way to install networking media to maximise performance and minimise upkeep
What is an entrance facility (EF)?
An entrance facility is a location where the incoming network (such as Internet) connects with the school or corporate network.
What is a demarc?
A demarc (demarcation point) is the device that marks where a telecommunications service provider’s network ends and the organisation’s network begins
What is an MDF?
A main distribution frame is the centralised point of interconnection for an organisation’s LAN or WAN(also called MC or main cross connect)
What is a data room?
A data room is an enclosed space that holds network equipment (also called data closet, data centre, equipment room, or telecommunications room)
What is a rack?
A rack holds various network equipments
What is a patch panel?
A patch panel is a panel of data receptors which can be mounted to a wall or a rack (A patch panel provides a central termination point when many patch cables converge in a single location)
What is VoIP?
VoIP (Voice over IP) is the use of any network to carry voice signals using TCP/IP protocols.
What is an IDF?
An IDF (intermediate distribution frame) provides an intermediate connection between the MDF and end-user equipment on each floor and in each building
What outlets does the ANSI/TIA standard require wall jacks to have?
The ANSI/TIA standard requires wall jacks to have one voice and one data outlet.
What are the two different types of racks?
- Two post
- Four post
What method is used to cool racks in data centres containing multiple racks?
A hot aisle/cold aisle layout is used. Cool air is pulled from the vents in the floor or from low-lying wall vents into the rows of racks.
What is a patch cable?
A patch cable is a relatively short length of cabling with connectors at both ends
What is horizontal cabling?
Horizontal cabling is cabling that connects workstations to the closest data room and to switches housed in the room
What is backbone cabling?
Backbone cabling consists of cables or wireless links that provide interconnection between the entrance facility and MDF and between MDF and IDFs
What is the maximum amount of cable you can leave exposed when terminating a cable?
Don’t leave more than 1 inch of exposed cable before a termination.
What is bend radius?
Bend radius is the radius of the minimum arc into which you can loop a cable without impairing data transmission. Do not exceed the cable’s prescribed bend radius
What is continuity?
Continuity refers to a cable segment being able to transmit data reliably. Use a cable tester to verify a cable segment works
What are cable coverings and conduits?
Cable coverings and conduits are used to cover exposed cables. It is good practice to avoid laying cables across the floor
What are EMI sources?
EMI sources produce electromagnetic interference such as fluorescent lights. Cables should be installed at least 3 feet away from EMI sources.
What is plenum cabling?
Plenum cabling is used when cabling is required to run above ceiling tiles or below subflooring
What is the usual standard of Ethernet?
Ethernet II
What does ethernet add to a payload?
Ethernet adds a header and a trailer to the payload. This creates a frame around the payload. The header and the FCS make up the 18-byte “frame” around the data
What amount of bytes may the data portion of an Ethernet frame contain?
The data portion of an Ethernet frame may contain from 46 to 1500 bytes
