Ch2-Fundamentals of Ethernet LANs Flashcards
A series of LAN standards defined by the IEEE, originally invented by Xerox and jointly developed by Xerox, Intel, and DEC.
Ethernet
Institute of Electrical and Electronics Engineers, a professional organization that develops communications and network standards
IEEE
A local-area network that physically transmits bits using cables, often the wires inside cables. A term for local-area networks that use cables, emphasizing the fact that the LAN transmits data using wires (in cables) instead of radio waves
wired LAN
A local-area network that physically transmits bits using radio waves.
wireless LAN`
A term referring to an Ethernet data link header and trailer, plus the data encapsulated between the header and trailer
Ethernet Frame
10Mb baseband Ethernet specification using two pairs of twisted-pair cabling (Cat 3,4, or 5). One pair transmits and the other pair receives. Distance limit of 100m.
10BASE-T
A name for the IEEE Fast Ethernet standard that uses two-pair copper cabling to provides a speed of 100Mbps, with a maximum cable length of 100m.
100BASE-T
A name for the IEEE Fast Ethernet standard that uses four-pair copper cabling to provides a speed of 1000Mbps, with a maximum cable length of 100m.
1000BASE-T
The common name for all Ethernet standards that send data at 100Mbps
Fast Ethernet
The common name for all Ethernet standards that send data at 1000Mbps
Gigabit Ethernet
A 48-bit (6-byte) binary number, usually written as a 12-digit hexadecimal number, used to uniquely identify nodes in an Ethernet network
Ethernet address, MAC address.
Generally, any address that represents all devices, and can be used to send messages to all devices. In Ethernet, the MAC address of all binary 1s, or FFFF.FFFF.FFFF in hex.
Broadcast address
Generally, any address in networking that represents a single device or interface, instead of a group of addresses.
Unicast address
A PC will transmit on pins and receive on pins <a></a>
1,2 ; 3,6
A switchport will transmit on pins and receive on pins <a></a>
3,6 ; 1,2
List the order of fields in an Ethernet Frame
Preamble, SFD, Destination MAC Source MAC Type Data+Pad FCS
How many bytes are in the Ethernet Preamble field?
7
How many bytes are in the Start Frame Delimiter
1
How many bytes are in the Ethernet Destination Address field?
6
How many bytes are in the Ethernet Source Address field?
6
How many bytes are in the Ethernet Type field?
2
Describe the size in bytes of the Packet encapsulated within an Ethernet Frame
46-1500 bytes. Padding may be added by the sender to meet the 46-byte minimum requirement
What is the size in byes of the Ethernet Frame Check Sequence?
4
How large in bits is a MAC address?
48 bits
How large in bytes is a MAC address?
6 bytes
How large in bits is the OUI of a MAC address?
24 bits
How large in bits is the Vendor-assigned portion of a MAC address?
24 bits
How large in bytes is the OUI of a MAC address?
3 bytes
How large in bytes is the Vendor-assigned portion of a MAC address?
3 bytes
How large in hex digits is a MAC address?
12
What is the value of the TYPE field of a frame encapsulating an IPv4 packet?
0800
What is the value of the TYPE field of a frame encapsulating an IPv6 packet?
86DD
Ethernet IEEE standard
802.3
Describe 802.3 in terms of common name, formal name, speed, max distance and media type.
“Ethernet,” 10Mbps, copper, 100m, 10BASE-T
Describe 802.3u in terms of common name, formal name, speed, max distance and media type.
“Fast Ethernet,” 100Mbps, copper, 100m, 100BASE-T
Describe 802.3ab in terms of common name, formal name, speed, max distance and media type.
“Gigabit Ethernet,” 1000Mbps, copper, 100m, 1000BASE-T
Describe 802.3z in terms of common name, formal name, speed, max distance and media type.
“Gigabit Ethernet,” 1000Mbps, fiber, 5km, 1000BASE-LX
Describe 802.3an in terms of common name, formal name, speed, max distance and media type.
“10 Gigabit Ethernet,” 10Gbps, copper, 100m, 10GBASE-T
