Chapter 4 Flashcards

Question

Distribution racks

Answer 1

hold network equipment such as routers and switches, plus patch panels and rack-mounted serves Also called 19" racks because the upright rails are 19" apart

Answer 2

specifies how cabling should be organized, regardless of the media type of network ``` Large networks typically use most or all of these: Work area Horizontal wiring Telecommunication closets Equipment rooms Backbone or vertical wiring Entrance facilities ```

Answer 3

where workstations and other user devices are located Faceplates and wall jacks are installed in the work area, patch cable connects computers and printers to wall jack

Answer 4

runs from the work area's wall jack to the telecommunication closet Wiring from the wall jack to the patch panel should be no longer than 90 meters

Answer 5

provides connectivity to computer equipment in nearby work area typical equipment includes patch panels to terminate horizontal wiring runs, hubs, and switches

Answer 6

A Telecommunications closet that houses the cabling and devices for work area computers

Answer 7

houses servers, routers, switches, and other major network equipment and serves as a connection point for backbone cabling

Answer 8

an equipment room that's the connection point between IDF's An MDF can be the main cross-connect for the entire network or may serve as the connecting point for backbone cabling between buildings Each building often has its own MDF

Answer 9

interconnects IDFs and MDFs Runs between floors or wings of a building and between buildings Frequently fiber-optic cable but can also be UTP if the distance between TCs is less than 90 meters

Answer 10

the location of the cabling and equipment that connects a corporate network to a third-party telecommunications provider Can also serve as an equipment room and the man cross-connect for all backbone cabling where a connection to WAN is made

Answer 11

point where corporate LAN equipment ends and a third-party provider's equipment and cabling begins

Answer 12

putting RJ-45 plugs on the ends of cable or punching down wires into terminal blocks on a jack or patch panel

Answer 13

568A and 568B

Answer 14

Standard patch cables (same wiring standard on both sides)

Answer 15

use 568A standard on one side of the cable and 568B standard on the other side Crosses the transmit and receive wires so that that they transmit on one end connects to the receive on the other Often needed when you connect two devices of the same type to one another For a 1000BaseT crossover cable, you have to cross the blue and brown pins because they're used in 1000BaseT

Answer 16

transmit on pins 1 and 2, receive on pins 3 and 6 (PC NICs and routers are examples)

Answer 17

receive on pins 1 and 2, transmit on pins 3 and 6 when two switches (or any other like devices) need to be connected, you use a crossover cable so that transmit and receive wires get crossed

Answer 18

Because each pair has one negative and one positive signal. This helps mitigate the effect of crosstalk and noise on the cable

Answer 19

Bits are transmitted as pulses of light instead of electricity Immune to electrical interference Highly secure (electronic eavesdropping is eliminated) Composition: A slender cylinder of glass fiber called the core is surrounded by a concentric layer of glass called the cladding Fiber is then jacketed in a thin transparent plastic material called the buffer