Data Link Layer

Question 1

What is the protocol most widely used to send data across individual links?

Answer 1

Ethernet

Question 2

What is CSMA/CD?

Answer 2

Carrier Sense Multiple Access With Collision Detection

Used to determine when the communications channels are clear, and when a device is free to transmit data.

Question 3

What is a MAC Address?

Answer 3

A globally unique identifier attached to an individual network interface.

Question 4

What is the OUI?

Answer 4

Organizationally Unique Identifier

The first three octets of a mac address that identify who the manufacturer is.

Question 5

What is a Data Packet?

Answer 5

An all-ecompassing term that represents any single set of binary data being sent across a Network link

Question 6

What is a data packet at the ethernet level known as?

Answer 6

An Ethernet Frame

Question 7

What is an Ethernet frame?

Answer 7

A highly structured collection of infromation presented in a specific order.

Question 8

What is a Preamble?

Answer 8

The first part of the Ethernet frame.

its made up of 8 bytes (64 bits) long, and can itself be split into two sections