Author:
degraffm
ID:
92780
Filename:
Chapter 3
Updated:
2011-07-02 16:47:55
Tags:
network
Folders:

Description:
Fundamentals of LAN
Show Answers:

  1. Which of the following is true about the cabling of a typical modern Ethernet LAN?
    • a. Connect each device in series using coaxial cabling
    • b. Connect each device in series using UTP cabling
    • c. Connect each device to a centralized LAN hub using UTP cabling
    • d. Connect each device to a centralized LAN switch using UTP cabling
  2. Which of the following is true about the cabling of a 10BASE2 Ethernet LAN?
    • a. Connect each device in series using coaxial cabling
    • b. Connect each device in series using UTP cabling
    • c. Connect each device to a centralized LAN hub using UTP cabling
    • d. Connect each device to a centralized LAN switch using UTP cabling
  3. Which of the following is true about Ethernet crossover cables?
    • a. Pins 1 and 2 are reversed on the other end of the cable.
    • b. Pins 1 and 2 on one end of the cable connect to pins 3 and 6 on the other end of the cable.
    • c. Pins 1 and 2 on one end of the cable connect to pins 3 and 4 on the other end of the cable.
    • d. The cable can be up to 1000 meters long to cross over between buildings.
    • e. None of the other answers is correct.
  4. Each answer lists two types of devices used in a 100BASE-TX network. If these devices were connected with UTP Ethernet cables, which pairs of devices would require a straight-through cable?
    • a. PC and router
    • b. PC and switch
    • c. Hub and switch
    • d. Router and hub
    • e. Wireless access point (Ethernet port) and switch
  5. Which of the following is true about the CSMA/CD algorithm?
    • a. The algorithm never allows collisions to occur.
    • b. Collisions can happen, but the algorithm defines how the computers should notice a collision and how to recover.
    • c. The algorithm works with only two devices on the same Ethernet.
    • d. None of the other answers is correct.
  6. Which of the following is a collision domain?
    • a. All devices connected to an Ethernet hub
    • b. All devices connected to an Ethernet switch
    • c. Two PCs, with one cabled to a router Ethernet port with a crossover cable and the
    • other PC cabled to another router Ethernet port with a crossover cable
    • d. None of the other answers is correct.
  7. Which of the following describe a shortcoming of using hubs that is improved by
    instead using switches?
    • a. Hubs create a single electrical bus to which all devices connect, causing the devices to share the bandwidth.
    • b. Hubs limit the maximum cable length of individual cables (relative to switches)
    • c. Hubs allow collisions to occur when two attached devices send data at the same
    • time.
    • Hubs restrict the number of physical ports to at most eight.
  8. Which of the following terms describe Ethernet addresses that can be used to
    communicate with more than one device at a time?
    • a. Burned-in address
    • b. Unicast address
    • c. Broadcast address
    • d. Multicast address
  9. Which of the following is one of the functions of OSI Layer 2 protocols?
    • a. Framing
    • b. Delivery of bits from one device to another
    • c. Error recovery
    • d. Defining the size and shape of Ethernet cards
  10. Which of the following are true about the format of Ethernet addresses?
    • a. Each manufacturer puts a unique code into the first 2 bytes of the address.
    • b. Each manufacturer puts a unique code into the first 3 bytes of the address.
    • c. Each manufacturer puts a unique code into the first half of the address.
    • d. The part of the address that holds this manufacturer’s code is called the MAC.
    • e. The part of the address that holds this manufacturer’s code is called the OUI.
    • f. The part of the address that holds this manufacturer’s code has no specific name.
  11. Which of the following is true about the Ethernet FCS field?
    • a. It is used for error recovery.
    • b. It is 2 bytes long.
    • c. It resides in the Ethernet trailer, not the Ethernet header.
    • d. It is used for encryption.
    • e. None of the other answers is correct.