Term
Ethernet Fundamentals
MAC Addresses consist of?
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Definition
- 48 bits in length and expressed as 12 hexadecimal digit
- The first six hexadecimal digits, which are administered by the IEEE, identify the manufacturer or vendor
- This portion of the MAC address is known as the Organizational Unique Identifier (OUI)
- The remaining six hexadecimal digits represent the interface serial number or another value administered by the manufacture
- MAC addresses are sometimes referred to as burned-in MAC addresses (BIAs) because they are burned into ROM and are copied into RAM when the NIC initializes
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Term
Ethernet Fundamentals
Main happenings at the Data-Link Layer
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Definition
At the data link layer MAC headers and trailers are added to upper layer data
The header and trailer contain control information intended for the data link layer in the destination system
The data from upper layers is encapsulated within the data link frame, between the header and trailer, and then sent out on the network
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Term
Ethernet Fundamentals
The NIC uses the ------- to determine if a message should be passed on to the upper layers of the OSI model
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Definition
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Term
Ethernet Fundamentals
Ethernet is which commitee standard?
Which committe created cable standards?
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Definition
IEEE 802.3 committee - MAC Sublayer
IEEE 802.2 committee - LLC Logical Link Controller Sublayer
EIA/TIA T568A & T568B
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Term
Ethernet Fundamentals
In CSMA/CD, The logic of waiting to send until the LAN is silent is called |
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Definition
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Term
Ethernet Fundamentals
Straigh-through used for? |
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Definition
Hub to router, PC, or file server
Switch to router, PC, or file server |
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Term
Ethernet Fundamentals
Cross over cable used for? |
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Definition
Hub to hub
Switch to switch
Hub to switch
PC, router, or file server to another PC,router, or file server |
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Term
Ethernet Fundamentals
Computers use __ __ to identify the sender and reciever of an ethernet frame? |
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Definition
| Computers use unicast addresses to identify the sender and receiver of an Ethernet frame |
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Term
Ethernet Fundamentals
MAC Address is __ bits and __ hex digits
Which is OUI and which is vendor assigned? |
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Definition
48 bits and 12 hex digits
First 6 hex digits are the OUI, last 6 are vendor assigned |
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Term
Ethernet Fundamentals
What are the 3 types of MAC addressing? |
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Definition
| Unicast address |
A term for a MAC that represents a single LAN interface. |
| Broadcast address |
An address that means “all devices that reside on this LAN right now.” |
| Multicast address |
On Ethernet, a multicast address implies some subset of all devices currently on the Ethernet LAN |
IEEE Group (MAC) addressing on Broadcast and Multicast |
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