digital comm and data comm

1. T-1 carrier ca n carry how many voice or
data channels?
a. 48
b. 24 – ans
c. 672
d. 480
2. Super jumbo group multiplex _____ VB
channels
a. 3600
b. 10800 – ans
c. 1800
d. 2500
3. What is the total speed of BRI-ISDN?
a. 144 kbps – ans
b. 1.544 Mbps
c. 2.05 Mbps
d. 64 kbps
4. _____ is also known as the Universal
DSL
a. HDSL
b. DSL Lite
c. ADSL – ans
d. xDSL
5. _____ was develop as a replacement
for X.25 packet switching
a. ATM
b. Frame relay - ans
c. ISDN
d. SONET
6. What is the unlicensed frequency for
Bluetooth technology?
a. 1.44 GHz
b. 2.4 GHz - ans
c. 3.4 GHz
d. 4.4 GHz
7. ____ is a layer 1 transport service on
fiber optic cabling?
a. ATM
b. SONET - ans
c. VPN
d. HDSL
8. This protocol lays down the
specification for the process and
procedure for a Bluetooth service to
discover the functionalities available in
other Bluetooth devices
a. L2CAP
b. SDP – ans
c. IrDA Protocol
d. TCP/IP
9. Wala
10. A type of network topology where
nodes are connected in sequential
order
a. Bus
b. Mesh
c. Ring
d. Star
11. ___ is a protocol that defines how
internet sites can be written to fit on
cellular devices screens and how
devices access and view these sites.
a. WAP
b. TCP/IP
c. Wi-Max
d. WiFi
12. ___ is the T-3 transmission rate of 44
Mbps with 673 channels
a. Fractional T-1
b. Full T-1
c. DS-3
d. DS-0
13. ___ provides reliable high speed
services starting as low as 2.4 kbps and
ranges as high as 45 Mbps
a. VSAT
b. ISDN
c. Leased Line – ans
d. DSL
14. This layer enables receiving devices to
understand the information sent from
the source
a. Network
b. Presentaion – ans
c. Data link
d. Application
15. E-1 carrier can carry how many voice or
data channels?
a. 30
b. 40
c. 50
d. 60
16. It is the term used when two or more
stations attempting to access a network
at the same time
a. Collision
b. Convention
c. Contention
d. Attenuation
17. ___is the result of two or more
message sent on the same line at the
same time
a. Collision – ans
b. Convention
c. Contention
d. Attenuation
18. ___ is fiber optic network protocol
based on dual ring topology
a. Token Ring
b. Token Bus
c. Network security
d. FDDI – ans
19. What is the group name for IEEE
802.10?
a. Token Ring
b. Token Bus
c. Network security – ans
d. FDDI
20. This layer is responsible for the correct
addressing and delivery of packets of
data
a. Network - ans
b. Presentation
c. Data link
d. Application
21. Enables receiving device to understand
the information sent from the source
a. Network
b. Presentation – ans
c. Data link
d. Application
22. At the ___ layer the bits may be analog
or digital in form of electrical, light or
radio waves.
a. Physical – ans
b. Session
c. Transport
d. Network
23. ___ is another 2.4 GHz radio w/c has
many similarities to Bluetooth wireless
technology. This can operate ad hoc
networks (data only) or be under a
control of a connection point
coordinating the system and providing a
gateway to the telephone
network(voice and data).
a. RF Home - ans
b. RFI
c. WiFi
d. UMTS
24. The technology is used to replace a
wired LAN throughout a building. The
transmission capacity is high and so is
the number of simultaneous users.
a. IEEE 802.10
b. IEEE 802.11 - ans
c. IEEE 802.12
d. IEEE 802.13
25. The destination device returns the data
to its original format before passing to
the ___ layer.
a. Network
b. Presentation
c. Data link
d. Application
26. It also manages the speed of
transmission – flow control
a. Physical
b. Session
c. Transport - ans
d. Network
27. ___ is a business organization w/c
provides regulated telephone,
telegraph, telex and communication
services.
a. CCLEC
b. LEC
c. Common carrier – ans
d. IXC
28. ___ is a common carrier that provides
local telephone services.
a. CCLEC
b. LCE – ans
c. Common carrier
d. IXC
29. ___ is a common carrier that provides
long distance services
a. CCLEC
b. LEC
c. Common carrier
d. IXC – ans
30. The ___ appeared in the 1960’s and
defined the basis for all
communications networks today
a. Packet switching
b. Packet switching WANS
c. X.25
d. Frame Relay
31. Who invented the mouse in 1960’s?
a. Douglas Engelbart - ans
b. Vinton Cerf
c. Gordon Gould
d. John Postel
32. Who invented the dot matrix printer in
1970?
a. Dovetronics
b. Comtronics
c. Centronics - ans
d. Techtronics
33. Who invented the 56 kbps MODEM in
1996?
a. Tim Berners-Lee
b. Robert Kahn
c. Ray Tomlinson
d. Dr. Brent Townshend – ans
34. Who invented the LASER in 1957?
a. Douglas Engelbart
b. Vinton Cerf
c. Gordon Gould – ans
d. John Postel
35. Who develop the e-mail in 1972?
a. Tim Berners-Lee
b. Robert Kahn
c. Ray Tomlinson - ans
d. Dr. Brent Townshend
36. Who invented the first Modern Credit
Card in 1950?
a. Paul Mockapetris
b. Frank X. Mc Namara – ans
c. John Bardeen
d. Jack Kilby
37. Who developed the TCP in 1973?
a. Paul Mockapetris and John
Postel
b. Vinton Cerf and Robert Kahn -
ans
c. Robert Metcalfe
d. Paul Baran
38. Who developed the Ethernet in 1973?
a. Paul Mockapetris and John
Postel
b. Vinton Cerf and Robert Kahn
c. Robert Metcalfe - ans
d. Paul Baran
39. Who invented the Domain Name
System(DNS) in 1984?
a. Paul Mockapetris and John
Postel - ans
b. Vinton Cerf and Robert Kahn
c. Robert Metcalfe
d. Paul Baran
Paul Mockapetris and John Postel introduce
DNS in 1984, which also introduces the domain
name system. The first Internet domain name
‘symbolics.com’ is registered by Symbolics, a
Massachusetts computer company on march
15, 1985.
40. What is the first internet domain name?
a. Symbolics.com – ans
b. Usa.net
c. eBay.com
d. http://www.yahoo.com
41. Who invented the HTML in 1990?
a. Tim-Berners Lee - ans
b. Robert Kahn
c. Ray Tomlinson
d. Dr. Brent Townshend
In 1990, Tim Berners-Lee develops HTML which
made a huge contribution to how we navigate
and view internet today.
42. The first ISP which was introduced in
1974
a. Pacific Internet
b. Nortel
c. Compunent
d. Telenet – ans
43. Who develop the TCP/IP in 1978?
a. Danny Cohen, David Reed and
John Scoch – ans
b. Bardeen, Brattain and Shockley
c. Vint Cerf, Robert Kahn and Tim
Berners Lee
d. None of the choices
In 1978, TCP splits into TCP/IP driven by Danny
Cohen, David Reed and John Shoch to support
real-time traffic. This allows the creation of
UDP.TCP/IP is later standardized into ARPANET
on January 1, 1983 and is still the primary
protocol used for the internet.
44. Who introduces WWW to the public on
August 6,1991?
a. Tim Berners – Lee - ans
b. Robert Kahn
c. Ray Tomlinson
d. Dr. Brent Townshend
Tim Berners – Lee introduces WWW to the
public on August 6, 1991. The World Wide Web
(WWW) is what most people today consider the
‘internet’ or a series of sites and pages that are
connected with links. The internet as a whole
had hundreds of people who helped developed
the standards and technologies that make it
what it is today, but without the WWW the
internet would not be as popular and useful as
it is today.
45. What is the first widely used graphical
World Wide Web browser developed
and first released on April 22, 1993?
a. Netscape Navigator
b. Internet Explorer
c. Mozilla
d. Mosaic – ans
Mosaic is the first widely used graphical World
Wide Web browser developed and first
released on April 22, 1993 by the NCSA with the
help of Marc Andreessen and Eric Bina. A big
competitor to Mosaic was Netscape, which was
released a year later. Today, most of the
Internet browsers we use today, e.g. Internet
Explorer, Firefox, etc. got their inspiration from
the Mosaic browser.
46. Java is a programming language
developed by ___
a. James Gosling
b. Igor Stravinsky
c. Brendan Eich
d. Dennis Ritchie
Originally known as oak, Java is a programming
language developed by James Gosling and
others at Sun Microsystems that was first
introduced to the public in 1995 and today is
widely used to create Internet applications and
other software programs.
47. JavaScript is a programming language
and is originally known as ___
a. PostScript
b. LiveScript - ans
c. ManuScript
d. RoleScript
Originally developed by Brendan Eich and
known as LiveScript, which was renamed to
JavaScript in 1995. JavaScript is an interpreted
client-side scripting language that allows a web
designer the ability to insert code into their web
page.
48. Ensures that the packet is in the correct
format for the destination
a. Network
b. Presentaion
c. Data link
d. Application
49. This protocol is very commonly used to
upload files and download them from
servers on the network is another
application program. This is often
invoked transparently by Web browser
or file downloads.
a. FTP - ans
b. TCP
c. SMTP
d. IP
50. A system that allows users to access
documents from widely separated
source on the internet using a common
interference.
a. WWW – ans
b. HTTP
c. SNMP
d. IGRP
51. ___ is a term used to refer to a process
where multiple analog message signals
or digital data streams are combined
into one signal over a shared medium.
a. Multiplexing – ans
b. Multiple Access
c. Source Coding
d. Channel Coding
52. A reserve process known as ____, can
extract the original channels on the
receiver side
a. Calibrating
b. Decoding
c. Demultipexing – ans
d. Decrypting
53. ___ is unsophisticated form of
multiplexing which simply constitutes
propagating signals from different
sources on different cables.
a. FDM
b. TDM
c. SDM – ans
d. PDM
54. In ___, two data channels modulate the
same frequency that has been shifted in
different phase angle.
a. FDM
b. TDM
c. SDM
d. PDM – ans
55. In ___, multiple sources that originally
occupied the same frequency spectrum
are each converted to a different
frequency band and transmitted
simultaneously over a single
transmission medium,
a. FDM - ans
b. TDM
c. SDM
d. PDM
56. What is the complete name of a bus
topology?
a. Common Bus Multipoint
Topology - ans
b. Full Mesh Topology
c. Common Bus Multipoint
Topology
d. Common Oriented Bus
Topology
57. Super Jumbo group can multiplex ___
VB channels
a. 3600
b. 10800 - ans
c. 1800
d. 2500
58. Master group can multiplex ___ VB
channels
a. 400
b. 10,000
c. 12
d. 600 - ans
59. ____ is a measure on how much
information can be propagated through
a communication system and is a
function of bandwidth and transmission
time.
a. Information Theory
b. Information System
c. Information Capacity - ans
d. Information Dissemination
60. It is the rate of change at the input of a
MODEM
a. Baud - ans
b. Bit rate
c. Bandwidth
d. Guard band
61. What is the exchange of predetermined
signals between two devices
establishing a connection: usually a part
of communication protocols?
a. Handshaking - ans
b. Connectivity
c. Protocols
d. Communication
62. What specifies the rules for data
transfer between stations?
a. Link Control
b. Data Control - ans
c. Transmission control
d. Transmission rules
63. What is the process of monitoring the
received data and determining when a
transmission error has occurred?
a. Error monitoring
b. Error detection - ans
c. Protocol
d. Data monitoring
64. Involves transmitting each character
twice
a. Error
b. Redundancy - ans
c. Dual Transmission
d. Duplex
65. Responsible for the rate of transmission
a. Physical
b. Session
c. Transport
d. Network - ans
66. Enforces order in the communication
between devices
a. Physical
b. Session - ans
c. Transport
d. Network
67. The part of the network that carries the
heaviest traffic
a. Segment
b. Back bone - ans
c. Node
d. Architecture
68. The portion of light in a fiber that is
redirected to that it travels in the
opposite direction of intended
transmission
a. Cut-off wavelength
b. Delay slew
c. Cross connect
d. Back scattering - ans
69. The data-carrying capacity of a
transmission medium, usually
measured in hertz, which equals cycles
per second.
a. Data rate
b. Bandwidth - ans
c. Baud rate
d. Bit rate
70. The frequency band occupied by a
single or composite signal in its original
or unmodulated form
a. Base band - ans
b. Broad band
c. Wide band
d. Narrow band
71. It is the science and art of transforming
messages to make them secure and
immune to attacks
a. Chromatography
b. Flooding
c. Cryptography - ans
d. DOS
72. A non-for-profit professional
association for hose involved in the
design and installation of cabling
infrastractures/telecommunications
distribution system.
a. ISO
b. IEEE
c. ANSI
d. EIA/TIA - ans
73. A wireless technology that allows for
signal to be transmitted over distance
of <10 meters at a frequency of 2.4 GHz
at speed of less than 1Mbps speed
a. WiFi
b. WIMAX
c. Bluetooth – ans
d. Infrared
74. Atransmission facility that has a
bandwidth (capacity) capable of
carrying numerous voice, video and
data channels simultaneously. Each
channel operates on a different
frequency.
a. Base band
b. Broad band - ans
c. Bandwidth
d. Narrow band

75. The material that surrounds the fiber
a. Core
b. Cladding
c. Buffer - ans
d. Gela
76. SMTP, HTTP and FTP are the services in
the ____ layers.
a. Physical
b. Session
c. Transport - ans
d. Application
77. Determines the best path for the packet
a. Physical
b. Session
c. Transport
d. Network - ans
78. A Physical or logical path for the
transmission of information
a. Leased line
b. Cross line
c. Channel - ans
d. FEXT
79. The twist in twisted wire pairs:
a. Reduce EMI - ans
b. Occur at a 30 degree angle
c. Eliminate loading
d. Were removed due to cost
80. The transparent material, usually glass
that surrounds the core of the optical
fiber
a. Core
b. Cladding - ans
c. Buffer
d. Gela
81. Typically refers to the point on each
floor of a building where the drop side
device (workstation) connects to the
system side equipment (LAN).
a. Cabinet strip
b. Cabinet - ans
c. Patched port
d. Patching cable
82. A device mounted on the end of a fiber
for the purpose of mating the fiber to a
source, receiver, or other device, or to
another fiber through a coupling sleeve.
a. Connector
b. Terminator - ans
c. Optoisolator
d. Decoupler
83. The condition when two or more
stations attempt to use the same time
a. Collision
b. Competition
c. Contention - ans
d. Attenuation
84. The center of an optical fiber
a. Core - ans
b. Cladding
c. Buffer
d. Gela
85. Fiber optic cables operate at
frequencies near
a. 20MHz
b. 299 MHz
c. 2 GHz
d. 800 THz -ans
86. The unwanted introduction of signals
from one channel to another
a. Crosstalk -ans
b. Cross over
c. Cross patch
d. Cross connect
87. _____ refers to the receive/transmit
terminals initialized at dispersed sites
connecting to a central hub via satellite
a. VSAT -ans
b. ISDN
c. Leased line
d. DSL
88. Packets that travel in any path, but not
necessary the same as each other
a. Packet Sniffer
b. Datagram -ans
c. Frames
d. Flags
89. What is the standard PRI-ISDN format
for North America
a. 28+D
b. 238+D -ans
c. 308+2D
d. 8+D
90. The technology was designed for
modern networks which do not need
lots of error recovery?
a. Packet switching
b. Frame relay -ans
c. ISDN
d. xDSL
91. …
92. Nonconductive fiber optic cables may
be contructed using all dielectric
materials. These cables are especially
suitable for use in hight EMI
environments and areas of high
electrical potential
a. Conductor
b. D-type -ans
c. Dielectric
d. Metal
93. What do you call the installed
telephone pair to the customer
premises?
a. Local loop - ans
b. Twisted pair
c. Coax
d. Fiber optic cable
94. The technology uses the lower 3 layers
of the OSI model
a. Packet switching -ans
b. Frame relay
c. ATM
d. SONET
95. A CCITT standard for transmitting at
114.4 kbps, full duplex on a switched
circuit
a. V92 -ans
b. V32 bis
c. V16
d. V32
96. A family of high-speed digital
transmission system designed according
to their transmission capacity
a. T-carrier
b. E-Carrier
c. DS0 - ans
d. OC
97. Signal outside of the frequency range
allowed for a voice signal
a. Out-of-band -ans
b. In-band
c. Out-of-range
d. Side band
98. Energy generated by outside sources,
such as lighting system and electric
motors which is received by copper
data/voice cable and interfere with
transmission
a. RFI -ans
b. FPT
c. DTMF
d. EMI
99. An unwanted action to a computer or
network system
a. Spyware -ans
b. Malware
c. Threat
d. Host controller
100. A proprietary set of high-level
communications protocol designed to
use small, low power, digital radios
a. Kerberos
b. TKIP
c. Zigbee -ans
d. WAP