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LAN Standards in Relation to OSI Reference Model

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LAN Standards in Relation to OSI Reference Model

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Questions and Answers

What does the Logical Link Control (LLC) sublayer provide in the data-link layer?

Maintains a table of MAC addresses

Independence from existing technologies (correct)

Transitions down to the physical layer

Determines the physical media access

How are MAC addresses used in the data-link layer?

To provide independence from existing technologies

To identify Layer 3 protocols

To maintain a table of device addresses (correct)

To control physical media access

What is the purpose of the Media Access Control (MAC) sublayer?

Provides independence from existing technologies

Transitions up to the network layer

Determines the physical media access

Defines MAC addresses (correct)

How do computers in an Ethernet LAN determine when to send data frames?

By listening to the media before transmitting Signup and view all the answers

What is the role of the Logical Link Control (LLC) header in the encapsulation process?

Tells the data-link layer what to do with a packet Signup and view all the answers

Why is carrier sense multiple access collision detect (CSMA/CD) used in Ethernet LANs?

To prevent data collisions Signup and view all the answers

What type of networks are LANs?

High-speed, low-error data networks that cover a relatively small geographic area Signup and view all the answers

What do LANs connect within a limited geographic area?

Workstations, peripherals, terminals, and other devices Signup and view all the answers

Which organization originally developed Ethernet?

DEC, Intel, and Xerox Signup and view all the answers

What was the original name for Ethernet due to the cable's thickness?

Thick Ethernet Signup and view all the answers

What updated standard for Ethernet was referred to as Ethernet II?

Thin Ethernet Signup and view all the answers

Which professional organization defines network standards, including LAN standards?

Institute of Electrical and Electronics Engineers (IEEE) Signup and view all the answers