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Network+ N10-006 > Ethernet Basics CH 4 > Flashcards

Ethernet Basics CH 4 Flashcards

1
Q

What is sneaker-net?

A

This was a term used to describe. Saving data to a floppy putting on your shoes and walking to the next computer.

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2
Q

What is a Hub?

A

Receives data on one port and repeats it to all other ports except the originating port.

Note: Reads incoming signal and sends new copies of that signal out to every connected port.

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3
Q

What is a Preamble of a frame?

A

a 7-byte series of alternating ones and zeroes followed by a 1-byte Start Frame. Gives NIC time to realize a frame is coming and to know exactly where the frame starts.

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4
Q

What adds the Preamble?

A

The sending NIC

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5
Q

48-bit (6-Byte) address is also known as what?

A

MAC address

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6
Q

Why would a system have two MAC addresses?

A

The system has more then one NIC

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7
Q

What is Promiscuous mode

A

NIC processes all the frames it sees on the cable regardless of their MAC addresses.

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8
Q

What is a Type of a frame?

A

Helps the receiving computer interpret the frame contents at a very basic level.

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9
Q

What is a Data of a frame?

A

Contains payload the frame carries.

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10
Q

What is a Pad of a frame?

A

the min size of a ethernet frame is 64 bytes. pad is extra data to created by the NIC to make the packet a min of 64 bytes.

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11
Q

What is FCS

A

FCS (Frame Check Sequence) special code attached to each frame that helps determine the integrity of data.

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12
Q

Carrier sense multiple access/collision detection determines what?

A

Which computer should use a shared cable at a given moment.

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13
Q

When Two NICs send at the same time what happens?

A

A collision occurs, the hub sends out the overlapping signals, and the NIC detects the collision.

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14
Q

After a Collision occurs and a NIC detects the collision what happens?

A

The NIC generates a random number and waits for that period of time, the NIC with the lowest number will start generating traffic and avoid a collision.

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15
Q

what is a collision domain?

A

a group of nodes that have the capability of sending frames at the same time as each other resulting in collisions.

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16
Q

What is 10Base2 or Thinet?

A

Use RG-58 coaxial cable with BNC connections on the end.
Uses a Bus topology.
Uses a T connector to connect to the BUS.

17
Q

What must you do with a 10Base2 (thinnet) connection

A

Terminate at the ends of the BUS

18
Q

10Base2 Networks can be used at a maximum distance of what?

A

185 Meters

19
Q

10Base5 Networks can be used at a maximum distance of what?

A

500 Meters

20
Q

What is the minimum CAT standard cable that can be used with a 10BaseT?

A

Cat3 or higher

21
Q

What should you check first when investigating an outage with multiple systems on a 10BaseT network?

A

The HUB

22
Q

NICs that can only communicate in one direction at a time run in what mode?

A

Half Duplex

23
Q

NICs that can send and receive at the same time are in what mode?

A

Full Duplex

24
Q

What TIA/EIA standard is this?

Orange/White 1 | Orange 2 | Green/White 3 | Blue 4 | Blue/White 5 | Green 6 | Brown/White 7 | Brown 8 |

A

568B

25
Q

What TIA/EIA standard is this?

Green/White 1 | Green 2 | Orange/White 3 | Blue 4 | Blue/White 5 | Orange 6 | Brown/White 7 | Brown 8 |

A

568A

26
Q

List the 8 colors in order using the 568B Standard

A

Orange/White | Orange | Green/White | Blue | Blue/white | Green | Brown/White | Brown |

27
Q

List the 8 colors in order using the 568A Standard

A

Green/White 1 | Green 2 | Orange/White 3 | Blue 4 | Blue/White 5 | Orange 6 | Brown/White 7 | Brown 8 |

28
Q

10BaseFL uses what type of cabling?

A

Fiber-Optic

29
Q

What are the reasons to use Fiber Optic cables??

A

Up to 2km Distance, EMI is not a factor, Security(much harder to wire tap)

30
Q

What is a MDI?

A

Media dependent interface is a regular port on a switch or a hub

31
Q

what is MDIX?

A

Media dependent interface crossover (MDIX) is an uplink port

32
Q

How do you create a cross over cable?

A

Reversing cables on pins 1,2,3,6 from the other side of the wire. One end is wired according to 568A and the other is according to 568B

33
Q

Crossover cables connect in _______ Port?

A

Standard port

34
Q

What is a straight through cable?

A

has both cable standards (568A, 568B) of the RJ-45 connector using Twisted Pairs

35
Q

What is a rollover cable?

A

Has an RJ-45 connector on one end and a class RS-232 serial port on the other.

36
Q

How does a Bridge work?

A

Acts like a repeater to connect two Ethernet networks, But goes one step beyond -filtering and forwarding traffic between those segments based on the MAC address of the computers on those segments. (Preserves Bandwidth)

37
Q

What Layer of the OSI model do Bridges work?

A

Networking Layer 3

Network+ N10-006 (3 decks)

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