Chapter 3 Hardware Flashcards
Ethernet is:
a system of communication rules that allow computers to work together
What is known as baseband transmission?
Ethernet cables carrying small voltage pulses (1 is voltage, 0 is no voltage) over a single frequency
Ethernet cables are bidirectional which means:
hosts can send and receive data on one cable
What are the most common of the standard cabling grades?
Category 5e (CAT5e)
Category 6 (CAT6)
Category 6a (CAT6a)
The most common of standard cabling grades are suitable for use with:
standard 10BASE-T
Fast Ethernet network
The most common of standard cabling grades can be used for what if they pass compliance testing?
Gigabit Ethernet
Network Type(s) Supported; Supported Speeds; Notes
CAT3
10BASE-T Ethernet; Up to 10Mbps; Legacy, also supported Token Ring networks at up to 16Mbps
Network Type(s) Supported; Supported Speeds; Notes
CAT5
10BASE-T, 100BASE-T (Fast Ethernet); Up to 100Mbps; Uses 24-gauge wires
Network Type(s) Supported; Supported Speeds; Notes
CAT5e
10BASE-T, 100BASE-T, 1000BASE-T (Gigabit Ethernet); Up to 1000Mbps; Enhanced version of CAT5
Network Type(s) Supported; Supported Speeds; Notes
CAT6a
10BASE-T, 100BASE-T, 1000BASE-T, 10GBASE-T (10Gbps Ethernet); Up to 10Gbps; Enhanced version of CAT6
Network Type(s) Supported; Supported Speeds; Notes
CAT6
10BASE-T, 100BASE-T, 1000BASE-T (Gigabit Ethernet); Up to 1000Mbps (1Gbps); Often uses 22-gauge or 20-gauge wire pairs (both of which are thicker than 24-gauge wire)
Network Type(s) Supported; Supported Speeds; Notes
CAT7
10BASE-T, 100BASE-T, 1000BASE-T, 10GBASE-T (10Gbps Ethernet); Up to 10Gbps; Uses 12-connector GG45 connector (backward compatible with RJ-45)
There are two categories of TP cable in terms of fire rating:
Standard
Plenum
A Standard cable is suitable for:
patch cables between a NIC and a network jack or in a patch panel
A Standard cable typically has:
a PVC jacket, which can create a lot of smoke when burned
A Plenum cable is designed for:
use in space used for HVAC air exchanges such as ventilator shafts, under floors, or between suspended ceilings and the permanent ceiling
Plenum cables produce:
less smoke when burned,
a lower level of toxic chemicals when burned
Plenum cable jackets might be made from:
Teflon or from a modified version of PVC that produces less smoke when burned than standard PVC
What is the most common of the major cabling types?
Twisted-pair (TP) cabling
What is the physical construction of a Twisted-pair (TP) cable?
four twisted pairs of wire surrounded by a flexible jacket (unshielded TP, or UTP) or various types of metal foil or braid (shielded TP, or STP)
STP uses what connector as UTP?
RJ-45 connector
UTP and STP cable can be purchased how?
in prebuilt assemblies
UTP and STP can be built using what?
bulk cable and connectors
What is T568B (EIA-568B)?
The de facto wire pair standard for all types of Ethernet UTP cables