5. Exploring the TCP/IP Link Layer

Question 1

Name the Media, Maximum Segment Length, and Connector: 100BASE-TX

Answer 1

TIA Cat5 UTP two-pair | 100 m | ISO 8877 (RJ-45)

Question 2

Name the Media, Maximum Segment Length, and Connector: 100BASE-FX

Answer 2

62.5/125-micron multimode fiber | 400 m | Duplex MIC ST

Question 3

Name the Media, Maximum Segment Length, and Connector: 1000BASE-T

Answer 3

TIA Cat5e UTP four-pair | 100 m | ISO 8877 (RJ-45)

Question 4

Name the Media, Maximum Segment Length, and Connector: 1000BASE-SX

Answer 4

62.5/50-micron multimode fiber | 275 m (62.5 microns), 550 m (50 microns) | Optical Fiber Connector

Question 5

Name the Media, Maximum Segment Length, and Connector: 1000BASE-LX

Answer 5

9-micron single-mode fiber | 5-10 km | Optical Fiber Connector

Question 6

Speed and throughput range for UTP Cables

Answer 6

10 Mbps to 40 Gbps

Question 7

Maximum length for UTP cables

Answer 7

100 m (30 m for 40 Gbps)

Question 8

Max Speed of Cat 5

Answer 8

100 Mbps

Question 9

Max Speed of Cat 5e

Answer 9

1000 Mbps

Question 10

Max Speed of Cat 6

Answer 10

10 Gbps

Question 11

Max Speed of Cat 6a

Answer 11

10 Gbps

Question 12

Max Speed of Cat 7

Answer 12

10 Gbps

Question 13

Max speed of Cat 8

Answer 13

40 Gbps

Question 14

What is PoE

Answer 14

Power over Ethernet

Question 15

RJ-45 Wiring Diagram for T-568B

Answer 15

1. Orange Stripe
2. Orange Solid
3. Green Stripe
4. Blue Solid
5. Blue Stripe
6. Green Solid
7. Brown Stripe
   8 Brown Solid

Question 16

RJ-45 Wiring Diagram for T-568A

Answer 16

1. Green Stripe
2. Green Solid
3. Orange Stripe
4. Blue Solid
5. Blue Stripe
6. Orange Solid
7. Brown Stripe
8. Brown Solid.

Question 17

In what situation would you need a Crossover Cable?

Answer 17

When connecting like device to like device.

Switch to Switch, Router to Router, etc.

Question 18

Three components of a Fiber Optic Cable (From Outside to Inside)

Answer 18

1. Buffer (or Coating)
2. Cladding
3. Core

Question 19

Two Fiber Types

Answer 19

1. Single-Mode Fiber

2. Multi-Mode Fiber

Question 20

Four Characteristics of Multi-Mode Fiber

Answer 20

1. LED Transmitter
2. Lower Bandwidth and Speed
3. Shorter Distances
4. Less Expensive

Question 21

Four Characteristics of Single-Mode Fiber

Answer 21

1. Laser Transmitter
2. Higher Bandwidth and Speed
3. Longer Distances
4. More Expensive

Question 22

What media uses an LC connector, and in what kind of environment?

Answer 22

Fiber Optic Cables, In enterprise equipment and commonly used on SFP Modules.

Question 23

What media uses an SC connector, and in what kind of environment?

Answer 23

Fiber Optic Cables, for enterprise equipment

Question 24

What media uses an ST connector, and in what kind of environment?

Answer 24

Fiber Optic Cables, for patch panels

Question 25

What media uses an FC connector, and in what kind of environment?

Answer 25

Fiber Optic Cables, for patch panels. Used by service providers.

Question 26

What media uses an MT-RJ connector, and in what kind of environment?

Answer 26

Fiber Optic Cables. Is a two-fiber connector for enterprise environment

Question 27

What is an SFP

Answer 27

``` Small Form-factor Pluggable module. It is a hot-pluggable I/O device that plugs into module sockets. ```

Question 28

Max speed of SFP module

Answer 28

1 Gbps

Question 29

Max speed of SFP+ module

Answer 29

10 Gbps

Question 30

What technology has replaced cross-over cables

Answer 30

auto-MDIX (Automatic medium-dependent interface crossover)

Question 31

List the parts of a typical Ethernet Frame Field

Answer 31

1. Preamble 2. Destination MAC Address 3. Source MAC Address 4. Type 5. Payload 6. FCS

Question 32

Three major types of LAN communication

Answer 32

1. Unicast 2. Broadcast 3. Multicast

Question 33

Number of bits in a MAC address

Answer 33

48

Question 34

Number of Hexadecimal digits in a MAC address

Answer 34

12

Question 35

Define OUI

Answer 35

Organizationally Unique Identifier. | - The first half of a MAC address. This is unique to a manufacturer and is regulated by the IEEE.

Question 36

What is included in the second half of a MAC address?

Answer 36

The 24 bit, vendor assigned, end-station address. | -The portion of the MAC address that uniquely identifies the Ethernet Hardware.

Question 37

Define CAM

Answer 37

Content-Addressable Memory. | - Where the MAC address table is stored.

Question 38

What is a I/G Address bit?

Answer 38

Individual/Group address bit. - aka a Broadcast or Multicast bit. When the least significant bit in the first octet of the MAC address is 1, it indicates that the frame is destined for all or a group of end stations.

Question 39

What is a U/L Address bit?

Answer 39

Universally or Locally administered address bit. - It is the second least significant bit of the first octet of the MAC address. If it is set to 1, it means that the MAC has been modified locally.