Chapter 2: Fundamentals of Ethernet LANs Flashcards
Valid straight-through cable connections
Host to switch, host to hub, router to switch or hub.
Valid crossover cable connections
Switch to switch, host to host, hub to hub, or a switch to a hub.
10BASE-T bandwith
10Mbps
100BASE-TX bandwith
100/200 Mbps
100BASE-FX bandwith
100/200 Mbps
1000BASE-T bandwith
1Gbps
1000BASE-TX bandwith
1Gbps
1000BASE-SX bandwith
1Gbps
1000BASE-LX bandwith
1Gbps
10GBASE-T bandwith
10Gbps
10GBASE-SX4 bandwith
10Gbps
10GBASE-LX4 bandwith
10Gbps
10BASE-T cable type
Cat3/Cat5 UTP
100BASE-TX cable type
Cat5 UTP
100BASE-FX cable type
Multimode Fiber
1000BASE-T cable type
Cat5e UTP
1000BASE-TX cable type
Cat6 UTP
1000BASE-SX cable type
Multimode Fiber
1000BASE-LX cable type
Single-mode Fiber
10GBASE-T cable type
Cat6a-Cat7 UTP
10GBASE-SX4 cable type
Multimode Fiber
10GBASE-LX4 cable type
Single-mode Fiber
10BASE-T max distance
100m
100BASE-TX max distance
100m
100BASE-FX max distance
400m at 100Mbps, 2km at 200Mbps
1000BASE-T max distance
100m
1000BASE-TX max distance
100m
1000BASE-SX max distance
550m
1000BASE-LX max distance
2km
10GBASE-T max distance
100m
10GBASE-SX4 max distance
550m
10GBASE-LX4 max distance
2km
What is CSMA/CD?
Carrier Sense Multiple Access with Collision Detection. Each device senses the cable for a digital signal before transmitting. Frame collisions result in a jamming pattern then hosts re-transmit after a random interval.
Which two terms describe Ethernet addresses that can send a frame to multiple addresses?
Broadcast & Multicast
802.3i
10BASE-T
802.3u
100BASE-TX or Fast Ethernet
802.3z
1000BASE-CX
802.3ab
1000BASE-T or Cat 5
802.3an
10GBase-T
PC & Router NIC transmitters use:
Pins 1 & 2
PC & Router NIC receivers use:
Pins 3 & 6
Hub & Switch receivers use:
Pins 1 & 2
Hub & Switch transmitters use:
Pins 3 & 6
Ethernet frame
A term referring to an Ethernet data link header and trailer, plus the data encapsulated between the header and trailer.
The three main parts of an Ethernet Frame
Header, Data & Pad, Trailer
All fields of an Ethernet Frame
Preamble, SFD, Destination, Source, Type, Data & Pad, FCS
Ethernet Frame Preamble: Bytes, Description
7, Synchronization
Ethernet Frame SFD: Bytes, Description
1, Signifies that the next byte begins the Destination MAC address field
Ethernet Frame Destination MAC Address: Bytes, Description
6, Identifies the intended recipient of this frame
Ethernet Frame Type: Bytes, Description
2, Defines the type of protocol used within the frame
Ethernet Frame Data and Pad: Bytes, Description
46-1500 holds data from a higher layer
Ethernet Frame FCS: Bytes, Description
4, Determines the event of a transmission error
MAC address size
48 bits
The Broadcast MAC address
FFFF:FFFF:FFFF address
A series of LAN standards defined by the IEEE, originally invented by Xerox Corporation and developed jointly by Xerox, Intel, and Digital Equipment Corporation.
Ethernet
Fast Ethernet
The common name for all the IEEE standards that send data at 100 megabits per second.
Gigabit Ethernet
The common name for all the IEEE standards that send data at 1 gigabit per second.
Ethernet link
A generic term for any physical link between two Ethernet nodes, no matter what type of cabling is used.
A popular type of cabling connector used for Ethernet cabling. It is similar to the RJ-11 connector used for telephone wiring in homes in the United States. Allows the connection of eight wires.
RJ-45
A generic term for the opening on the side of any Ethernet node, typically in an Ethernet NIC or LAN switch, into which an Ethernet cable can be connected.
Ethernet port
A computer card, sometimes an expansion card and sometimes integrated into the motherboard of the computer, that provides the electronics and other functions to connect to a computer network.
network interface card (NIC)
A 48-bit (6-byte) binary number, usually written as a 12-digit hexadecimal number, used to identify Ethernet nodes in an Ethernet network describes what?
Ethernet address
A standardized data link layer address that is required for every device that connects to a LAN. 6 bytes long and controlled by the IEEE. Also known as a hardware address or a physical address.
MAC address
A local-area network (LAN) that physically transmits bits using radio waves. The name “wireless” compares these LANs to more traditional “wired” LANs, which are LANs that use cables (which often have copper wires inside).
Wireless LAN
