Data Communications
Q1. The internet standards organization that will allow anyone to join is __________________.
a. ANSI
b. ISO
c. IETF
d. IEEE
e. ITU-T
Q2. The function of the file server is to:
a. store data and software programs that can be used by client computers on the network.
b. manage all printing requests from clients on the network.
c. transfer e-mail messages to other servers on the network.
d. store HTML documents for an Internet or intranet web site.
e. coordinate the communication of client and servers on the network.
Q3. The first transcontinental telephone service was established in the 1940s.
a. true
b. false
Q4. The high bandwidth requirements (high communications needs) for video have slowed its integration into computer networks.
a. true
b. false
Q5. Ethernet is an example of a network layer protocol.
a. true
b. false
Q6. In 1984, a federal judge broke up a highly contested telephone service monopoly and:
a. set up the Telecommunications Competition and Deregulation Act
b. permitted MCI to provide limited long distance service in the U.S.
c. permitted telephone and/or computer equipment that was not manufactured by Bell Telephone to be connected to AT&T’s network
d. divided AT&T into two parts: one part for long distance service, and a second part, comprised of seven regional operating companies, for local telephone service
e. set up deregulation for international telecommunications markets in 68 countries
Q7. Telecommunications is the transmission of voice and video as well as data and implies transmitting a longer distance than in a data communication network.
a. true
b. false
Q8. The fastest growing form of videoconferencing is:
a. mainframe
b. Outlook
c. Telnet
d. webcasting
e. desktop
Q9. With the “thin client” architecture, when an application changes, only the _________ with the application logic needs to be updated.
a. client
b. server
c. middleware
d. hardware
e. software
Q10. The World Wide Web was conceived at University of Utah as part of the development of the Internet.
a. true
b. false
Q11. Client-server architectures:
a. cannot connect computers that use different hardware
b. are one of the least used network architectures today
c. can use middleware to provide a standard way of communicating between software from more than one vendor
d. assign the responsibility for the presentation logic to the server
e. were the earliest type of network architectures
Q12. A ________ is a group of computers linked together so that they act as one computer.
a. workstation
b. transaction terminal
c. cluster
d. network computer
e. transaction terminal
Q13. Using the POP standard for client to server e-mail communication, the e-mail messages remain on the server computer.
a. true
b. false
Q14. A network computer is designed primarily to communicate using Internet based standards, but has no hard disk. It has only limited functionality.
a. true
b. false
Q15. With respect to converting digital data into analog signals, AM stands for:
a. Asynchronous Manchester
b. Analog Multimode
c. Amplitude Modulation
d. Anomaly Multiplexing
e. Analytical Mosaic
Q16. __________ is a line-of-sight type of wireless media.
a. coaxial cable
b. microwave
c. radio
d. twisted pair
e. fiber optic
Q17. ____________ refers to the transmission characteristics of the circuit.
a. handshaking
b. virtual circuit
c. bonding
d. logical circuit
e. physical circuit
Q18. In simplex transmission, the data flows in both directions at the same time.
a. true
b. false
Q19. The ability to transmit in both directions, but only in one direction at a time is an example of _______________ transmission.
a. simplex
b. full-duplex
c. half-duplex
d. analog
e. digital
Q20. ____________ is one of the most commonly used coding schemes used in data transmission.
a. ASCII
b. ISDN
c. MAU
d. ATM
e. FDM
Q21. ______________ refers to the time it takes for a signal to travel from sender to recipient (highly exaggerated with satellite transmission).
a. Line-of-sight effect
b. Multimode index
c. Saturation effect
d. Raindrop attenuation
e. Propagation delay
Q22. Equipment used to transform analog voice signals to digital signals and digital signals to analog signals.
a. voice converter
b. modem
c. codec
d. multiplexer
e. demodulator
Q23. Cyclical redundancy check is one of the most popular polynomial error-checking schemes.
a. true
b. false
Q24. With odd parity (assume that the parity bit (the right-most bit) has been placed at the end of each of the following) and a 7-bit ASCII code, which of the following is incorrect?
a. 01101011
b. 00011011
c. 00100101
d. 10110110
e. 11111110
Q25. With __________ ARQ, the sender pauses for a response from the receiver to alter each message or packet of data.
a. open window
b. halt and be recognized (HBR)
c. sliding window
d. stop and wait
e. continuous
Q26. Controlled access MAC approaches work better in a large network with high usage.
a. true
b. false
Q27. Gaussian noise is a special type of attenuation.
a. true
b. false
Q28. Overhead bits are used for error checking and marking the start and end of characters and packets.
a. true
b. false
Q29. The two categories of network errors are: lost data and delimited data.
a. true
b. false
Q30. The network layer sits directly between the application layer and the data link layer in the Internet five-layer network model.
a. true
b. false
Q31. TCP is the network layer protocol used on the Internet today.
a. true
b. false
Q32. In connection-oriented routing, the _________ layer sets up a virtual circuit between the sender and the receiver.
a. transport
b. network
c. physical
d. data link
e. connection
Q33. IPv6 will be based upon _________ -byte addresses.
a. 32
b. 24
c. 4
d. 16
e. 8
Q34. Server name resolution is done using the:
a. Address Resolution Protocol
b. Border Gateway Protocol
c. Internet Control Message Protocol
d. Routing Information Protocol
e. Domain Name Service
Q35. A special packet called a(n) _____________ packet is sent to the receiver requesting the establishment of a connection.
a. ACK
b. NAK
c. SYN
d. ARQ
e. FIN
Q36. Connectionless routing sets up a TCP connection, or virtual circuit between a sender and receiver.
a. true
b. false
Q37. As discussed in this textbook, three layers of a network model are the components required for a typical network, including local area networks.
a. true
b. false
Q38. A logical bus topology:
a. is always used by token ring protocol LANs
b. has all computers connected to each other in point-to-point connections
c. is limited to short distances since devices like a hub or repeater cannot be used with this type of topology
d. permits every message to be received by every computer on the bus, even when those messages are intended for other computers
e. has a central control device, such as a mainframe
Q39. The type of logical topology that Ethernet uses is a:
a. ring
b. bus
c. star
d. mesh
e. interconnected
Q40. Resource sharing refers to having users access the same data files, exchange information via e-mail, or use the Internet.
a. true
b. false
Q41. A peer-to-peer LAN:
a. has more capability than a dedicated server
b. supports a higher number of computers than a dedicated server
c. is generally cheaper in hardware and software than a dedicated server
d. is not appropriate for sharing resources in a small LAN
e. is often much faster than dedicated server networks
Q42. A collision on a bus circuit means that two computers on that circuit have transmitted at the same time.
a. true
b. false
Q43. A hierarchical tree of domains within one organization that are linked to other trees in the organization is called a ___________.
a. ADS
b. domain
c. forest
d. tree
e. NDS
Q44. A Bluetooth network is called ____________.
a. WLAN
b. Piconet
c. LAN
d. area
e. WAN
Q45. A(n) _____________ is required to connect a computer to WLAN.
a. Ethernet NIC
b. antennae
c. wireless NIC
d. access point
e. hub
Q46. A Bluetooth network is called a piconet.
a. true
b. false
Q47. 802.11a provides for speeds of up to 54 Mbps under perfect conditions.
a. true
b. false
Q48. Directional antennas produce a stronger signal over longer distances than omnidirectional antennas.
a. true
b. false
Q49. Point Coordination Function requires that each station that wishes to transmit on the wireless network sends a request-to-transmit (RTS) packet to the access point and waits for a clear-to-send (CTS) packet from the AP before it can communicate with other nodes on the network.
a. true
b. false
Q50. Extensible Authentication Protocol can dynamically produce WEP keys.
a. true
b. false
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