Multiple choice test computer science experts only
shakey2010
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1. Prior tocellular radio, mobile radio and telephoneservices required:
A. a high-power transmitter/receiver
B. multiple transmitters/receivers
C. only one or two dedicated channels
D. that many channels be used, which exceed the frequency capacity
2. When using cellular networks, __________.
A. a single base station can serve multiple cells
B. adjacent cells must use the same frequencies
C. adjacent cells are assigned different frequencies
D. non-adjacent cells are assigned different frequencies
3. Theideal design for cells in a cellular network is a hexagonal shape because _____.
A. this makes enforcement of shapes easier
B. this is the easiest to implement
C. this makes all frequencies available to all cells
D. this makes the distance to all adjacent cells thesame
4. When a mobile unit moves, it may connect with a different base station. This action is called
____________.
A. a handoff
C. a reconfiguration
B. a transfer
D. a dropped signal
5. Which of the following is NOT one of theways that frequency spectrum can be divided among
active users?
A. frequency division multiple access
C. code division multiple access
B. time division multipleaccess
D. cell division multiple access
6. Because of the limited frequencies available, a key design element of any cellular system is to
___________.
A. usesmall cells
B. employ multipleaccess
C. limit the number of users at one time
D. use as many frequencies as possible
7. The Wireless Application Protocol (WAP) is:
A. proprietary protocol developed in theUSA for wireless security
B. dependent on the specific network technologies employed
C. an Internet standard that replaces HTML, HTTP, and XML
D. designed to overcome many of the limitations hindering acceptance of mobile data services
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8. Which of the following is NOT one of thecomponents of the WAP specification?
A. A framework for wireless telephony applications
B. A full-featured communications protocol stack
C. A programming model based on the WWW
D. A markup languageadhering to XML
9. The WAP Programming Model uses a ________that acts as a proxy server for thewireless domain.
A. translator
C. gateway
B. WAP server
D. decoder
10. For a given system, multiple access is based on _______.
A. TDMA
C. CDMA
B. FDMA
D. all of the above
11. Important objectives of computer security include:
A. confidentiality
C. availability
B. integrity
D. all of the above
12. One type of attack on the security of a computer system or network that impacts the availability
of a system (e.g. destruction of a resourcein the system) is referred to as ___________.
A. incapacitation
C. modification
B. interception
D. all of the above
13. Thetype of attack on communications lines and networks known as traffic analysis belongs to the
general category of ____________.
A. active attacks
C. administrative attacks
B. passive attacks
D. none of the above
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14. Of the threeclasses of intruders into computer systems and networks, theclandestine user is
typically:
A. an insider to the organization
B. an outsider to the organization
C. either an insider or an outsider to the organization
D. none of theabove
15. Which of thefollowing is not an example of intrusion:
A. guessing and cracking passwords
B. running a packet sniffer on a workstation tocapture user names and passwords
C. using an unattended, logged-in workstation without permission
D. all of the aboveare examples of intrusion
16. A secret entry point into a program that allows intruders aware of the breached area to gain
access and bypass the usual security access procedures is called a:
A. logic bomb
C. virus
B. Trojan horse
D. none of the above
17. Thestage of a virus where it is activated to perform the function for which it was intended is
referred to as the _________.
A. propagation phase
C. execution phase
B. triggering phase
D. none of the above
18. A virus can beattached to a program by _________.
A. prepending
B. postpending
C. embedding other than at the beginning or end
D. all of the above
19. Which of thefollowing statements regarding macro viruses is true?
A. a macro virus is platform independent
B. macro viruses infect documents, not executable portions of code
C. macro viruses are easily spread
D. all of theabove
20. Which of thefollowing statements is generally true regarding the original class of email viruses?
A. it sends itself to selected names on the user’s email mailing list
B. arrive in email attachments
C. usually do no local damage on theinfected machine
D. all of the above
21. IPSec transport mode provides protection primarily for:
A. the Internet layer
C. network and link-layer protocols
B. upper-layer protocols
D. all of the above
22. The higher-layer protocols defined as part of SSL include:
A. handshake protocol
C. alert protocol
B. change cipher spec protocol
D. all of the above
23. The WiFi standard known as Privacy with message integrity can be described as follows:
A. a way of ensuring the privacy of the individual using WiFi
B. a techniquethat ensures that the data transmitted using WiFi have not been altered
C. a way of providing mutual authentication between a user and an AS
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D. none of the above
24. A key logical component of an IDS is:
A. sensors
C. user interface
B. analyzers
D. all of the above
25. A stateful inspection firewall ________.
A. applies a set of rules to each incoming and outgoing IP packet and then forwards or discards the
packet
B. controls TCP traffic by creating a directory of outbound TCP connections
C. acts as a relay of application-level traffic
D. sets up two TCP connections, one between itself and a TCP user on an inner host and one
between itself and a TCP user on an outside host
26. Which of the following is not a central element of a typical antivirus scheme?
A. detection
C. removal
B. identification
D. deterrence
27. Asynchronous transmission includes a start and stop bit with each character transmitted to ensure:
A. that thetotal number of bits is a factor of 10
B. toallow a continuous stream of data
C. to prevent single bit errors from occurring
D. toallow thereceiver to maintain synchronization withthesender
28. The most complex part of SSL is the ___________ Protocol.
A. Handshake
C. Alert
B. ChangeCipher Spec
D. Record
29. Which security area is addressed in IEEE 802.11i ?
A. authentication
B. key management
C. data transfer privacy D. all of theabove
30. The802.11i architectureconsists of ________ main ingredients.
A. one
C. three
B. two
D. four
31. The ________is one of a number of major Internet interconnection points that serve to tie all the
ISPs together.
A. CPE
C. IXP
B. POP
D. NSP
32. The ________is a company that provides backbone servicetoan ISP.
A. NSP
C. IXP
B. CO
D. CPE
33. A ________is a site that has a collection of telecommunications equipment and usually refers to
ISP or telephonecompany sites.
A. POP
C. CPE
B. NSP
D. IXP
34. _________are programs that extract information from nameservers in response to client
requests.
A. Name servers
C. Resolvers
B. DNS
D. IP datagram
35. The domain ________ is for network support centers, Internet service providers, and other
network-related organizations.
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A. org
C. com
B. info
D. net
36. Transport PDUs aretypically called ________.
A. channels
C. bridges
B. segments
D. frames
37. The ________layer covers the physical interface between a data transmission device and a
transmission medium or network.
A. physical
C. application
B. transport
D. network
38. IP appends a header of control information to each segment to form
a(n) __________.
A. IP datagram
C. checksum
B. end system
D. port
39. The ________supports a basic electronic mail facility by providing a mechanism for transferring
messages among separate hosts.
A. SNMP
C. HTTP
B. SSH
D. SMTP
40. The _________ is used to send files from one system to another under user command.
A. UDP
C. FTP
B. SMTP
D. SSH
41. The physical layer for IEEE 802.11 has been issued in _______stages.
A. 3
C. 7
B. 5
D. 9
42. Any entity that has station functionality and provides access to the distribution
system via thewireless medium for associated stations.
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A. access point
C. extended service set
B. basic service set
D. coordination function
43. Thelogical function that determines when a station operating within a BSS is
permitted to transmit and may beable to receive PDUs.
A. access point
C. extended service set
B. basic service set
D. coordination function
44. A set of one or more interconnected BSSs and integrated LANs that appear as a
single BSS to theLLC layer at any station associated with one of these BSSs.
A. MPDU
C. MSDU
B. ESS
D. DS
45. Information that is delivered as a unit between MAC users.
A. MPDU
C. MSDU
B. ESS
D. DS
46. Data communications via circuit switching involves three phases:
A. connect, transfer, hang-up
B. ring, talk, hang-up
C. dial, transfer, disconnect
D. establishment, data transfer, disconnect
47. A public telecommunications network can be described using four generic components:
A. senders, receivers, lines, and nodes
B. subscribers, local loops, exchanges, and trunks
C. subscribers, trunks, nodes, and loops
D. local loops, subscriber lines, exchanges, and trunks
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48. Which of thefollowing is NOT one of classes of function for control signaling?
A. establishment
C. call information
B. supervisory
D. network management
49. Which of thefollowing is NOT one of the stated advantages of packet switching over circuit
switching?
A. there is less network delay
C. priorities can be used
B. data rate conversion can be provided
D. connections are never rejected
50. Which of thefollowing is NOT a reason for network jitter when using packet switching networks?
A. packets may vary in length
B. packets may take different paths through the network
C. packets may encounter network congestion
D. data rates will vary from onetrunk line to the next
