Ethernet LAN Designs

Question 1

What does a transparent bridge do?

Answer 1

Creates separate collision domains on either side of it.

Question 2

What constitutes a collision domain on a modern switch?

Answer 2

Every switch port is a single collision domain.

Question 3

How can collisions occur on modern switches?

Answer 3

Switchport operating at half duplex. Frames from the PC could collide with broadcast frames.

Question 4

What two entities create broadcast domains?

Answer 4

Routers and VLANs.

Question 5

Definition of a broadcast domain?

Answer 5

A LAN is a broadcast domain.

Question 6

What is a two-tier campus design?

Answer 6

A network with access switches connecting to distribution switches in a partial mesh.

Question 7

What is a distribution switch?

Answer 7

A switch that provides a path through which access switches can forward traffic to each other.

Question 8

Formula for counting the number of links in a full mesh?

Answer 8

N(N-1)/2 where N=Number of devices

Question 9

What is another name for a two-tier network design?

Answer 9

Collapsed Core

Question 10

What is a core switch?

Answer 10

High performing switch that aggregates distribution switches.

Question 11

What is a three tier network design?

Answer 11

Core, Distribution, and Access switches. Core switches aggregate the distribution switches. Partial mesh between access and distribution switches and partial mesh between distribution and core switches.

Question 12

In terms of a network standard, what is Ethernet defined by?

Answer 12

802.3i , 10BASE-T, 10Mbps, with CAT3 or better cabling, max distance of 100 meters.

Question 13

In terms of a network standard, what is Fast Ethernet?

Answer 13

802.3u , 100BASE-T, 100Mbps, with CAT5 or better, max distance of 100 meters.

Question 14

In terms of a network standard, what is Gigabit Ethernet over copper?

Answer 14

802.3z , 1000BASE-T, 1000Mbps, with CAT5e or better, max distance of 100 meters.

Question 15

In terms of a network standard, what is Gigabit Ethernet over fiber?

Answer 15

802.3ab , 1000BASE-T, 1000Mbps, with Fiber cabling

Question 16

In terms of a network standard, what is 10 Gig over fiber?

Answer 16

802.3ae , 10GBASE-X , 10 Gbps, with OM-3 Multi-mode Fiber with max distance of 300 meters.

Question 17

In terms of a network standard, what is 10 Gig over copper?

Answer 17

802.3an , 10GBASE-T , 10 Gbps, with CAT6a or better with max distance of 100 meters.

Question 18

In terms of a network standard, with is 40 GigE?

Answer 18

802.3ba , 40GBASE-X , 40 Gbps, with fiber cabling

Question 19

In terms of a network standard, what is 100 GigE?

Answer 19

802.3ba , 100GBASE-X , 100 Gbps with fiber cabling.

Question 20

What is 1000BASE-SX

Answer 20

1 Gig Multi-mode Fiber with max distance of 550 meters

Question 21

What is 1000BASE-LX

Answer 21

1 Gig Multi-mode Fiber with max distance of 550 meters

Question 22

What is 1000BASE-LX with single mode

Answer 22

Single mode fiber with max distance of 5 km.

Question 23

802.3i

Answer 23

10BASE-T, 10Mbps, with CAT3 or better cabling, max distance of 100 meters.

Question 24

802.3u

Answer 24

100BASE-T, 100Mbps, with CAT5 or better, max distance of 100 meters.

Question 25

802.3z

Answer 25

1000BASE-T, 1000Mbps, with CAT5e or better, max distance of 100 meters.

Question 26

802.3ab

Answer 26

1000BASE-T, 1000Mbps, with Fiber cabling

Question 27

802.3ae

Answer 27

10GBASE-X , 10 Gbps, with OM-3 Multi-mode Fiber with max distance of 300 meters.

Question 28

802.3an

Answer 28

10GBASE-T , 10 Gbps, with CAT6a or better with max distance of 100 meters.

Question 29

802.3ba

Answer 29

40GBASE-X , 40 Gbps, with fiber cabling

Question 30

802.11

Answer 30

Defines wireless LANs

Question 31

Name 3 types of wireless LAN devices.

Answer 31

Autonomous AP, LWAP, and WLC

Question 32

What does an access switch design layout look like?

Answer 32

Star design