Day 30

Question 1

Where are MAC Addresses stored?

Answer 1

RAM

Question 2

Broadcast Address

Answer 2

FFFF.FFFF.FFFF.FFFF

Question 3

What happens when someone types in a broadcast address?

Answer 3

Switch floods frame out to every active port outside of the one sending the broadcast.

Question 4

Methods switches use to forward frames. Describe

Answer 4

1. Store-and-Forward: Entire frame is stored, CRC is calculated before the frame is forwarded.
2. Cut-through switching: Destination MAC is read and forwarded immedaitely.
3. Fragment-Free Mode: SW waits for collision window and then sends the frame.

Question 5

Symmetric Switching vs Asymmetric Switching

Answer 5

Symmetric - Ports have to be same speed.

Asymmetric - Ports can be different speeds.

Question 6

Methods Switches use to store frames

Answer 6

1. Port based memory: Frames are stored in queues that are linked to specific incoming ports.
2. Shared Memory: Frames are deposited into a common memory buffer for all ports

Question 7

Another name for Ethernet

Answer 7

802.3

Question 8

Data Link layer is divided into what two sections?

Answer 8

1. LLC

2. MAC

Question 9

The MAC sublayer within the Data Link layer has what responsibilities?

Answer 9

1. Data encapsulation

2. Media Access Control

Question 10

Ethernet speed, alternative name, standard, and cable type.

Answer 10

10 Mbps
10BASE-T
802.3
Copper, 100m

Question 11

Fast Ethernet Speed, alternative name, standard, and cable type.

Answer 11

100 Mbps
100BASE-TX
802.3u
Copper 100m

Question 12

Three most common ethernet standards today?

Answer 12

10BASE-T, 100BASE-T, 1000BASE-T

Question 13

T568A Pin Out

Answer 13

G/W
G
OR/W
BL
BL/W
OR
BR/W
BR

Question 14

T568B Pin Out

Answer 14

O/W
OR
G/W
BL
BL/W
GR
BR/W
BR

Question 15

Crossover Cable

Answer 15

Has T568A on one side, and T568B on the other.

Question 16

NIC to Hubs?

Answer 16

Crossover

Question 17

Hubs to Hubs?

Answer 17

Straight Through

Question 18

NIC to Routers?

Answer 18

Straight Through

Question 19

Router to Switch?

Answer 19

Crossover

Question 20

Hub to Switch?

Answer 20

Straight Through

Question 21

WAP to Switch?

Answer 21

Crossover

Question 22

Which two common devices transmit on 3 ,6 while receiving on 1 , 2

Answer 22

Hubs and Switches

Question 23

MAC Address make up

Answer 23

48 Bits
First half is OUI
Second half is Vender Assigned

Question 24

Ethernet Fields (In Order)

Answer 24

Preamble
SFD
Destination MAC
Source MAC
Length
Type
Data/Pad
FCS

Question 25

What is the purpose of the SFD?

Answer 25

Start Frame Delimiter

Signifies that the next byte begins the destination MAC field.

Question 26

Basics forms in which data is represented?

Answer 26

Copper
Fiber
Wireless

Question 27

Another name for wireless

Answer 27

802.11