Chapter 2-Ethernet LANs

Question 1

In the LAN for a small office, some user devices connect to the LAN using a cable, while others connect using wireless technology (and no cable). Which of the following is true the use of Ethernet in this LAN?

Answer 1

-only the devices that uses cables are using ethernet

Question 2

Which of the following Ethernet standards defines Gigabit Ethernet over UTP cabling?

Answer 2

1000BASE-T

Question 3

Which of the following is true about Ethernet crossover cables for Fast Ethernet?

Answer 3

Pins 1 and 2 one one end of the cable connect to pins 3 and 6 on the other end of the cable.

Question 4

Each answer list two types of devices used in a 100BASE-T network. If these devices were connected with UTP Ethernet cables, which pairs of devices would require a straight-through cable?

Answer 4

• pc and switch

- router and hub

Question 5

Which of the following are advantages of using multiimode fiber for an Ethernet link instead of UTP or single-mode fiber?

Answer 5

To extendd the link beyond 100 meters while keeping initial costs as low as possible.

Question 6

Which of the following is true about the CSMA/CD algorithm?

Answer 6

Collisions can happen but the algorithm defines how the computers should notice a collision and how to recover.

Question 7

Which of the following is true abou the Ethernet FCS field?

Answer 7

It resides in the Ethernet trailer, not the Ethernet header.

Question 8

Which of the following are true about the format if Ethernet addresses?

Answer 8

• each manufacturer puts a unique OUI code into thr first 3 bytes of the address
• each manufacturer puts a unique OUI code into the first half of the address
• the part of the address that holds this mafacturer’s code is called OUI

Question 9

Which of the following terms describe Ethernet addresses that can be used to send one frame that us delivered to multiple devices on the LAN?

Answer 9

Broadcat address

Multicast address