Chapter 2 - Fundamentals of Ethernet LANs

Question 1

10 Mbps is known under what common name?

Answer 1

Ethernet

Question 2

What is the informal IEEE Standard Name for 100 Mbps?

Answer 2

100BASE-T

Question 3

What is the cable type and maximum length for 1000 Mbps Gigabit Ethernet 1000BASE-LX Ethernet?

Answer 3

Fiber, 5000 m

Question 4

What is the common name and informal IEEE standard name for 802.3ab 1000 Mbps Ethernet?

Answer 4

Gigabit Ethernet, 1000BASE-T

Question 5

What is the cable type and maximum length for the 10 Gbps Ethernet?

Answer 5

Copper, 100 m

Question 6

For 10BASE-T and 100BASE-TX, a PC network interface card (NIC) transmits on what 2 pins?

Answer 6

1 and 2

Question 7

For 10BASE-T and 100BASE-TX, a PC network interface card (NIC) receives on what 2 pins?

Answer 7

3 and 6

Question 8

On a straight-through cable, pins 1 and 2 on one side of the connector connect to what pins on the opposite side?

Answer 8

1 and 2

Question 9

For 10BASE-T and 100BASE-TX, a switch transmits on what 2 pins and receives on what 2 pins?

Answer 9

Transmits on pins 3 and 6

Receives on pins 1 and 2

Question 10

What type of cable pinout crosses the pair at the transmit pins on each device to the receive pins on the opposite device?

Answer 10

Cross-over cable

Question 11

In a cross-over cable, pins 1 and 2 map to what 2 pins on the opposite end?

Answer 11

3 and 6

Question 12

If the endpoints transmit on the same pin pair, what type of cable should you use to connect the devices?

Answer 12

cross-over cable

Question 13

If the endpoints transmit on different pin pairs what type of cable should you use to connect the devices?

Answer 13

straight-through cable

Question 14

What types of devices transmit on pins 3 and 6?

Answer 14

Hubs and Switches

Question 15

What types of devices transmit on pins 1 and 2?

Answer 15

PCs, routers, and wireless access point

Question 16

What is a MAC address?

Answer 16

A data link layer address that is required for every device that connects to a LAN.

Question 17

What does MAC stand for?

Answer 17

Media Access Control

Question 18

How many bytes long is a MAC address?

Answer 18

6-bytes

Question 19

In what 2 parts is the MAC address divided?

Answer 19

First 24 bits or first 3 bytes is the OUI or organizationally unique identifier.
The 2nd 24 bit or second 3 bytes is the Vendor Assigned portion (NIC Cards, Interfaces)

Question 20

Which part of the MAC address is assigned by the IEEE?

Answer 20

OUI

Question 21

What is the logic in which a port sends data only when it is not also receiving data; in other words, it cannot send and receive at the same time?

Answer 21

Half-duplex

Question 22

What is the absence of the half-duplex restriction?

Answer 22

Full-duplex

Question 23

What device uses half-duplex logic and therefore any device connected to it would have to use half-duplex?

Answer 23

Hub