Multiple choice

1. (TCO 1) Multiplexing is used on wired and wireless communications links. Explain what multiplexing is, for the various types of multiplexing methods that are available list them and explain how they work. 
Multiplexing combines multiple signals for transmission over media types and there are three methods
Frequency Division Multiplexing (FDM) – different frequencies are used to combine each different stream of data
Time Division Multiplexing (TDM) – combines data streams by assigning a specific time slot
Wavelength Division Multiplexing (WDM) – data streams are modulated onto different sections of the light spectrum

2. (TCO 2) List and explain the difference between the types of fiber optic cable including the size of the cores in each type. 
Multimode fiber – Multiple modes/light rays are carried and used for communication over short distances (e.g: LAN). Core size is 50-100 micrometers.
Singlemode fiber – Single mode transmitted and suitable for communication over longer distances. Core size is 8-10micrometers.

3. (TCO 3) Explain what roll BICSI has in ensuring the structured cabling standards are adhered to.  BICSI has assumed the role of developing and designing cabling standards, specifically those used in structured cabling. It’s certifications are recognized as the leading credentials for installers and installations to adhere to.

4. (TCO 4) List and define the types of media that can be used in the outside plant. 
The types of media that can be used in the outside plant are:
Optical fiber – signals carried in form of light pulses
Copper cabling – transmits electrical signals (subject to interference)
Coaxial cabling – also copper based and can be shielded, but more expensive

1. (TCO 1) Block encoding takes several _____ and sends it out as a new code word. 
bytes
bits
wires
messages

2. (TCO 1) 1000 Mbps Ethernet uses _____ block encoding. 
4B/5B
differential
4D-PAM-5
PAM-5

3. (TCO 1) In NRZ, line encoding is a binary code where 1s are represented by _____ . 
absence of a signal
presence or level of a signal
a circular, sinusoidal signal
line block coding
 
4. (TCO 1) Digital signals are _____. 
discrete quantities
continuously varying quantities
based on block signaling
based on transmission errors

5. (TCO 2) The maximum frequency for category 5E cable is 
600 MHz.
250 MHz.
100 MHz. 
800 MHz.

6. (TCO 2) Category 3 cabling is used for _____ cabling. 
voice
wireless
outdoor
data

7. (TCO 2) This term has been appropriated by the cabling industry for a six-pin and eight-pin modular plug/jack. 
SC and ST connector
MT-RJ and Duplex RC connectors
568A and 568B
RJ-11 and RJ-45

8. (TCO 2) The_____ of a fiber-optic connector means that optical energy will be lost as light crosses the junction. 
crushing
low rating
misalignment
gluing

9. (TCO 3) When installing data, voice, or video cabling, copper or fiber, these guidelines should be followed every time for a successful installation. 
Work with a correct design
Never abuse cable
Consider upgrade requirements
All of the above


10. (TCO 3) All incoming wires are terminated to the back of this, because it offers the most flexibility in a telecom closet. 
PBX 
Router
Patch panel
66 block

11. (TCO 3) Before any cabling begins, all _____ should be installed. 
hardware
routers
servers
switches

12. (TCO3) This cabling can be either UTP or fiber-optics. 
Backbone
Copper
Singlemode
Multimode

13. (TCO 4) This is desirable in the outside plant because direct control is often beyond the user. 
Weatherproofed connections
Redundant connections
Epoxy glued connections
568 connections

14. (TCO 4) The outside plant is typically routed into the building through the _____. 
work area
right of way
entrance facility
tube

15. (TCO 4) The best choice for outside plant cabling is 
wireless.
copper cabling.
shielded twisted-pair (STP).
singlemode fiber-optic.

16. (TCO 4) Common local regulations include 
zoning.
building permit.
engineering analysis.
All of the above.

17. (TCO 5) The original form of Ethernet was a _____ based method. 
deterministic
wireless
contention
token based

18. (TCO 5) The type field in an Ethernet II frame is _____ bytes long. 
1
2
3
4

19. (TCO 5) The source address field in an Ethernet II frame is ____ bytes long. 
2
4
6
8

20. (TCO 5) An Ethernet II frame begins with a 
transporter.
period.
header.
preamble.

21. (TCO 6) This defines the rules that govern the establishment and maintenance of logical connections between communication devices. 
MAC
LLC
OSI
PPP

22. (TCO 6) This is where a stream of data is broken down into manageable chunks and information from each layer of the OSI model is added to that piece of data. 
Decapsulation
Precapsulation
Encapsulation
Postcapsulation

23. (TCO 6) Physical addresses fall into a(n) _____, while logical addresses fall into a(n) _____. 
interconnected addressing model, distributed addressing model
distributed addressing model, interconnected addressing model
hierarchical addressing model, flat addressing model
flat addressing model, hierarchical addressing model

24. (TCO 6) 10 Gigabyte Ethernet uses _____ encoding. 
PAM-5
4B/5B
differential
8B/10B

25. (TCO 7) Which one of these is measured for a baseline? 
Bootup Sequence
Backoff percentage
Propagation Velocity
Broadcast repeat rate

26. (TCO 7) The capacity of a data line is always higher than the _____. 
reversion rate
throughput
timing rate
RTT

27. (TCO 7) According to Fluke, what type of traffic is most prevalent on networks? 
UDP
Web browsing
SNMP
Ethernet

28. (TCO 7) There are _____ flags used on networks. 
8
4
2
1