Answers Chap 1 to Chap 3

Chap 1

Answers to Key Term Quiz

1.      network

2.      server

3.      hierarchy of information

4.      format

5.      stand-alone computer

6.      sneakernet

7.      peripherals

8.      local computer

9.      local area network, or LAN

10.  peer-to-peer

Answers to Multiple Choice Quiz

1.      b

2.      d

3.      b

4.      d

5.      a

6.      d

7.      c

8.      b

9.      a

10.  c

11.  a

12.  d

13.  b

14.  d

15.  b

Answers to Essay Quiz

1.      Answers should include a description of what a network is, compared to what makes up a computer network.

2.      Answers will vary but should discuss network start-ups and the fact that they usually need very little security. When they do, security is difficult to add, so it is better to start your network with a plan right away. The students should include a discussion of the hierarchy of data.

3.      Answers and forms will vary but should include discussions about the purposes of a network—data storage, sharing, communication, collaboration, and centralized maintenance.

4.      The answer should have some discussion about clients requesting services from servers. The numbers of clients will vary depending on the numbers of student stations and other various clients the students build into their assumptions. The important thing is that there is a logical reason why a client is on the network.

5.      The answer should include a discussion about how the purposes for a network relate to the workers and how they will benefit from each.




(2)Answers to Key Term Quiz

1.                  system unit

2.                  terminator

3.                  networking medium

4.                  network server

5.                  random access memory (RAM)

6.                  network client

7.                  network interface card (NIC)

8.                  hub

(2)Answers to Multiple-Choice Quiz

16.  d

17.  b

18.  c

19.  d

20.  a

21.  d

22.  b

23.  c

24.  a

25.  c

26.  d

27.  a

28.  b

29.  a, b, c

30.  d

(2)Answers to Essay Quiz

1.      You have just been promoted to your TEACH training lab’s Network Neighborhood Watch program and put in charge of a computer upgrade that involves everyone in your class working inside their CPUs. What should you remind each of your classmates before they open the cover of any computer?You should ensure that each member observes appropriate safety procedures to protect themselves and those around them while preventing damage to the system’s components. This includes using care around electrical wiring and making sure all components are unplugged from electrical sources of power prior to any kind of electrical component disassembly—including the computer’s system unit.

2.      You are in a hurry on a high-profile rollout of a new network at a client’s worksite. Lanesha, your normal training assistant for classes you offer at the TEACH facility asks you to explain the difference between a straight through cable and a crossover cable. What quick answer can you give Lanesha that satisfies her curiosity until you can better answer her question in the TEACH training labs?A straight-through cable is a networking wire type that connects two components directly to a hub, whereas a crossover cable is a networking wire type that connects one component to another but changes the wiring connections inside the cable.

3.      Keithon sent you on a service call to help Jolecelle, one of your TEACH coworkers, change out an inoperative network interface card. After you change out the card, how can you tell if her computer recognizes the new network interface card after Windows starts?Her Windows desktop will include a Network Neighborhood icon. Additionally, during the startup process, you may see Windows find additional resources and subsequently add the necessary network drivers.

4.      You have been asked to work with Steve in the Accounting firm that TEACH has handling all the payroll and customer account payments. Steve has requested that you and seven other co-workers reenter numerous pieces of financial data and send them over the network from student stations in the training section. How would the wire twists in the twisted pair cable running between the training section and the headquarters section affect your actions?The twists do two things that would help in this instance. First, they help filter out electromagnetic interference from one pair to another to reduce the possibility of cross talk that would possibly result in unusable data being received. Second, the possibility of intruders successfully eavesdropping and listening to the signal being sent over the line is reduced when that EMI is cancelled out because of the twists.

5.      What must you do on Huong’s computer (in the TEACH headquarters office) before Shandra (working on a computer in the TEACH training facility) can see (and access) Huong’s resources? You must connect Huong’s computer to Shandra’s network, configure it so that the two computers can speak to each other, add the data that you wish to share, and share at least one file.


Answers to the Cross-Check

(3)Sending and Receiving

1.      The modem encodes and decodes messages between the two.

2.      While it enables the communication where otherwise it may not occur, it slows the process down.

(3)Transmitting Mediums

1.      air.

2.      wireless.

(3)Changed Code

1.      Five.

2.      Five.

3.      Student answers will vary.

(3)Using the IEEE 802.3 Specifications

1.      Two address fields, and 46 bits because the first two have additional meaning for identifying address type and whether the address is a universal or local address.

2.      Frame length inconsistent, number of octets not integral, Generated CRC not identical to received CRC.

(3)Transmitting a Message

1.      Box 1 specified the coding scheme used, box 2 specified the left to right code, box 3 specified the up or down code, box 4 specified the word order, and box 5 specified the act or pass code.

2.      Use one of the coding blocks, or add another, to indicate the intended decoding team.

(2)Answers to Key Term Quiz

9.                  digital

10.              infinite

11.              binary

12.              modem

13.              rheostat

14.              ASCII

15.              unique address

16.              physical address

17.              topology

18.              fault tolerant

(2)Answers to Multiple-Choice Quiz

31.  b

32.  a

33.  d

34.  b

35.  c

36.  a, b, c

37.  b

38.  a

39.  d

40.  b, d

41.  a

42.  d

43.  a, b, d

44.  d

45.  b

(2)Answers to Essay Quiz

1.      The answers should include the fact that they use an agreed-upon protocol that is understandable by both, and they exchange digital information using a language that uses 1’s and 0’s (bits) as their letters, combined into words (bytes) of 8 bits each

2.      The answer should include descriptions of the physical address, the hardware address, and the node address, and how they combine to form the network address.

3.      The answer should include the fact that topology is the physical layout or arrangement of computers within a network, and that there are bus, ring, and star topologies.

4.      The answer is a break anywhere in the circle.

The answer is star topology.