1

Mid-Term Exam Review Questions and Answers

2

1. Represented as a decimal number, what is the result of the logical ANDing of binary numbers 00100011 and 11111100?

A. 3

B. 32 *

C. 35

D. 220

E. 255

3

2. What is the binary equivalent for the decimal number 248?

A. 11100000

B. 11110000

C. 11110100

D. 11111000 *

4

3. Convert the binary number 01011011 into its hexadecimal equivalent. Select the correct answer from the list below.

A. 5A B. 5B *C. 5C D. 5D E. 6B F. 7A

5

4. In an 8 bit binary number, what is the total number of combinations of the eight bits?

A. 128 B. 254 C. 255 D. 256 *E. 512 F. 1024

6

5. Which devices will create multiple collision domains in an Ethernet network? (Choose two.)

A. NIC

B. hub

C. switch *

D. router *

E. repeater

7

6. How many collision domains are shown in the diagram? A. three B. four C. five D. six E. seven *F. eight

8

7. Refer to the exhibit. The physical documentation shows a portion of the internetwork of the ABC Company. Which segments will be free of collisions?

A. segments 1 and 2 B. segments 1, 2, and 3 C. segments 1, 2, 3, 4, and 5 D. segments 2 and 3 E. segments 3, 4, and 5 *F. segments 4, and 5

9

8. Refer to the exhibit. How many broadcast domains are shown?

A. three *B. four C. five D. six E. eight F. ten

10

9. Which of the following statements are correct about CSMA/CD? (Choose three.)

A. It is a media access method used in LANs. *B. It is a media access method used in FDDI WANs. C. When a device needs to transmit, it checks to see if

the media is available. *D. A device sends data without checking media

availability because all devices have equal access. E. Multiple devices can successfully transmit

simultaneously. F. Only one device can successfully transmit at a time.

*

11

10. Refer to the exhibit. A network associate needs to establish an Ethernet connection between Host A and Host B. However, the distance between the two hosts is further than the cabling standards allow. Which two devices that operate at the physical layer of the OSI can be used to allow Host A and Host B to communicate? (Choose two.)

A. switch B. hub *C. bridge D. router E. repeater *

12

11. Which technologies are considered to be LAN technologies? (Choose two.)

A. DSL

B. Token Ring *

C. Frame Relay

D. ISDN

E. Ethernet *

13

12. Refer to the exhibit. What is the order of the TCP/IP Protocol Data Units as data is moved as indicated through the OSI model?

A. bits, segments, frames, packets, data B. bits, frames, packets, segments, data *C. bits, frames, segments, packets, data D. bits, packets, frames, segments, data

14

13. Which physical network topology is easy to monitor and troubleshoot, easy to add new devices to as the network expands, but subject to complete failure when a central hub or switch ceases to work?

A. bus

B. star *

C. ring

D. mesh

15

14. Refer to the exhibit. The hub and the switch are operating using factory default settings. Which hosts will receive the frame if host A transmits a broadcast frame?

A. Only workstation B and the router will receive the data. B. Workstations B, C, D, E, and the router will receive the data. *C. Only workstations connected to the hub will receive the data. D. Workstations B, C, D, E, and the router will receive the data

and it will be forwarded into the Internet.

16

15. Why would a company install a switch instead of a hub when building or expanding a corporate network?

A. A switch manages frames faster than a hub does. A switch operates at 100 Mbps.

B. A hub operates at a maximum of 10 Mbps. C. A switch modifies the Ethernet frame to remove any

errors. A hub forwards the frame exactly as it arrived.

D. A switch provides more bandwidth by sending frames only out the port to which the destination device is attached. A hub sends the frame out all ports except the source port. *

17

16. An Ethernet host receives a frame, calculates the FCS, and compares the calculated FCS to the FCS received in the frame. The host finds that the two FCS values do not match. What action will be taken by the host?

A. The host discards the frame. *B. The host processes the data frame normally. C. The host initiates a request for retransmission of the

frame. D. The host sends the frame content to an upper layer

protocol for error recovery.

18

17. Based on the graphic above, which of the following occurs as each host system comes on line in the topology?

A. The switch sends its MAC address to each host. B. The switch adds MAC address to the MAC table as each host

sends a frame. *C. Each host exchanges MAC addresses with each other. D. The switch listens for data traffic to block since the switch

lacks an IP address.

19

18. Refer to the exhibit. Identify the devices labeled A, B, C, and D in the network physical documentation.

A. A=bridge, B=switch, C=router, D=hub B. A=bridge, B=hub, C=router, D=switch *C. A=bridge, B=router, C=hub, D=switch D. A=hub, B=bridge, C=router, D=switch

20

19. Which of the following are layers of the TCP/IP model? (Choose three.)

A. Application *

B. Physical

C. Internet *

D. Network Access *

E. Presentation

21

20. Which of the following are ways that bandwidth is commonly measured? (Choose three.)

A. GHzps B. kbps *C. Mbps *D. Nbps E. MHzps F. Gbps *

22

21. Refer to the following list. Choose the correct order of data encapsulation when a device sends information.

1) segments 2) bits 3) packets4) data5) Frames

A. 1 - 3 - 5 - 4 - 2 B. 2 - 1 - 3 - 5 - 4 C. 2 - 4 - 3 - 5 - 1 D. 4 - 3 - 1 - 2 - 5 E. 4 - 1 - 3 - 5 - 2 *F. 3 - 5 - 1 - 2 - 4

23

22. Refer to the exhibit. The switch and the hub have default configurations, and the switch has built its CAM table. Which of the hosts will receive the data when workstation A sends a unicast packet to workstation C?

A. workstation C *B. workstations B and C C. workstations B, C, and the E0 interface of the router D. workstations B, C, D, E, F, and the E0 interface of the router

24

23. Which networking devices use the MAC address to make decisions? (Choose two.)

(I) NIC

(II) bridge

(III) hub

(IV) switch

(V) repeater

Which two options are correct?

A. I and III

B. I and IV

C. II and III

D. III and V

E. II and IV *

25

24. Which devices are primarily used to extend cable segments within a collision domain by regenerating the data signals? (Choose two.)

(I) switch (II) repeater (III) router (IV) bridge (V) hub

Which two options are correct?

A. I and III

B. II and IV

C. II and V *

D. III and V

E. I and IV

26

25. Which devices will create multiple collision domains in an Ethernet network? (Choose two.)

(I) NIC

(II) hub

(III) switch

(IV) router

(V) repeater

Which two options are correct?

A. I and III

B. III and IV *

C. II and III

D. III and V

E. I and IV

27

26. A network administrator has a multi-floor LAN to monitor and maintain. Through careful monitoring, the administrator has noticed a large amount of broadcast traffic slowing the network. Which device would you use to best solve this problem?

A. bridge

B. hub

C. router *

D. transceiver

28

27. What will a bridge do if it receives a frame with a MAC address that is not within the table?

A. discard frame

B. ignore frame

C. send frame to appropriate port

D. send frame to all ports except source port *

29

28. You are a network technician at UST. Your newly appointed trainee wants to segment a network. What devices would you advice him? (Choose all that apply.)

A. Use switch and hub converter.

B. Use media converters.

C. Use switches. *

D. Use routers. *

E. Use bridges. *

F. Use repeaters.

30

29. 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 is used for encryption.

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

E. None of the above

31

30. What is the name of the method used in Ethernet that explains how Ethernet works?

A. TCP/IP

B. CSMA/CD *

C. CMDA/CS

D. CSMA/CA

32

31. What is the bit length and expression form of a MAC address?

A. 24 bits expressed as a decimal number

B. 24 bits expressed as a hexadecimal number

C. 36 bits expressed as a binary number

D. 48 bits expressed as a decimal number

E. 48 bits expressed as a hexadecimal number *

33

32. At Layer 2 of the OSI mode, which component connects a host to the network media?

A. Hub

B. Switch

C. Bridge

D. NIC *

E. Transceiver

34

33. With which OSI layer is the term frame associated?

A. Physical

B. Network

C. Session

D. Data Link *

35

34. Which OSI layer is responsible for logical addressing?

A. Data Link

B. Physical

C. Transport

D. Network *

36

35. What portion of a MAC address is used as a vendor code?

A. First 6 hexadecimal digits *

B. Last 6 hexadecimal digits

C. First 2 hexadecimal digits

D. None