MODEMS & NETWORKS
QUESTIONS #5
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| 11 . What device separates computer network segments by their logical network addresses? A. Gateway B. Bridge C. Repeater D. Router | |
| 12 . Which network topology is not used by a token-ring network? A. BUS B. Mesh C. Star D. Ring | |
| 13 . UART is a type of serial chip. Its letters stand for: A. unidirectional access regarding transmission B. universal asynchronous receiver/transmitter C. unable all restore t-bits D. Uninterruptable Asynchronous Receiver transmitter | |
| 14 . What does 10baseT mean? A. 10Mbps Broadband transmisson twisted pair wire B. 100Mbps Baseband transmisson twisted pair wire C. 10Mbps Baseband transmisson temporary pair wire D. 10Mbps Baseband transmisson twisted pair wire | |
| 15 . Which hardware component controls serial port communications? A. ROM BIOS B. UART 15650 C. DMA823 D. UART 16550 | |
| 16 . What modem command is used to answer? A. ATH B. ATA C. ATD D. ATM | |
| 17. What type of PCMCIA card is used for modems and network cards. A. Type 1 B. Type II C. Type III | |
| 18 . What cabling will not be a victim of electromagnetic interference? A. Twisted pair B. Coaxial C. Thicknet D. Fiber-optic | |
| 19 . What connects twisted-pair cables into a physical star topology? A. Router B. Hub C. MAU D. Repeater | |
| 20. What provides the fastest transfer rates? A. T1 B. T3 C. IDSN D. POTS | |
| 21. Before a modem transmits, it send a: A. RTS B. DTR C. DSN D. RQS | |
| 22 . RTS stands for: A. request to send B. ready to start C. ready to switch D. request to scan | |
| 23 .Modems use ________________ transmission. A. synchronous B. asynchronous C. timed interval D. ata | |
| 24 . What connectivity device transmits packets the fastest ? A. bridge B. gateway C. router D. brouter | |
| RETURN TO TOP | |
| 25 . What topology is the easiest to modify ? A. bus B. ring C. token D. star | |
| 26 . What is the term for two modems establishing communications with each other: A. Interconnecting B. Connecting C. Pinging D. Handshaking | |
| 27 .The Domain Name Service (DNS) is used to resolve domain names to ____________ that the computer is able to understand. A. NetBIOS names B. IP addresses C. WINS names D. Hardware addresses | |
| 28 . What is used to resolve a name such as comptia.com to an IP address? A. Domain Name Service B. Domain Resolving Protocol C. Domain Resolution Service D. Domain Name Resolution System | |
| 29 . To set up Windows 95 on a Microsoft network, what do you need to purchase? A. A NIC and cabling B. Network software C. Windows NT Server 4.0 D. All of the above | |
| 30 . You have a network card with only one connector, which looks like a place to plug an oversized phone cord. What type of card is it? A. ethernet B. banyan C. token ring D. decnet | |
| 31 . Twisted-pair cable uses what type of connector? A. RJ-45 B. RJ-50 C. RJ-11 D. RJ-12 | |
| 32 . Thinnet coaxial cable uses what type of connector? A. BNC B. RJ-45 C. RJ-11 D. MSAU | |
| 33 . Thicknet coaxial cable uses what type of connector? A. BNC B. AUI C. DIX D. RJ-45 | |
| 34 . What is attenuation? A. loss of signal strength B. cable noise C. unwanted signals on the network D. analog interference | |
| 35 . What is used to boost a digital signal? A. repeater B. booster C. amplifier D. multiplexer | |
| 36 . What is used to boost an analog signal? A. amplifier B. multiplexer C. booster D. demodulator | |
| 37 . What is the maximum length of twisted-pair cable before a signal booster is needed? A. 1000 feet B. 150 meters C. 500 meters D. 328 feet | |
| 38 . What is the maximum length of thinnet cable before a signal booster is needed? A. 500 feet B. 185 meters C. 1600 feet D. 1000 feet | |
| 39 . Which of the following communications parameters is NOT of concern when you setup a modem? A. Parity B. Number of start bits C. Speed D. Number of stop bits | |
| 40 .You find a BNC "push-and-turn" connector on the back of personal computers. What is it most likely used for? A. Serial port B. Parallel port C. SCSI port D. Connection to a network (LAN) | |
| 41 .Which network cable is good for high speed and long distances? A. Shielded twisted pair B. Fiber optic C. Unshielded twisted pair D. None of the above | |
| 42 . An Ethernet network card can use: A. unshielded twisted pair wire B. thin coax C. thick coax D. All of the above | |
| 43 . What does 10Base5 mean? A. 10 Mbps, broadband transmission,5 twisted pair wires B. 10 Mbps, baseband transmission, 50 meters max C. 10 Mbps, broadband transmission, 500 meters max D. 10 Mbps, baseband transmission, 500 meters max | |
| 44 . What is the connector called that is on the end of an unshielded twisted pair wire? A. RJ-11 B. RJ-12 C. RJ-45 D. RJ-52 | |
| 45 . When is a null modem used? A. to exchange data between a DCE device and a DBE device B. to exchange data between 2 DTE devices C. to exchange data between 2 DCE devices D. to exchange data betwen 2 DBE devices | |
| 46 . In a peer to peer network, which one is true? A. Each computer can access every file on every other computer B. The file server provides data to every computer on the network C. Each computer acts like a client and a server D. Peer to peer networks are suitable for large organizations | |
| 47 .You need to install a NIC card in your PC. which type of NIC card will offer better performance? A. ISA B. PCI C. AGP D. EISA | |
| 48 . A 10BaseT cable is normally connected to a computer with what type of a connector? A. BNC connector B. T1 connector C. RJ-45 connector D. RJ-11 connector | |
| 49 . The IRQ for a PCI network interface card is NOT configured with ? A. Jumpers B. CMOS C. BIOS D. The operating system | |
| RETURN TO TOP | |
| 50 . A modem converts data from_______ _ ______ ? A. Analog to serial B. Digital to analog C. Serial to parallel D. Analog to parallel | |
| 51 . What AT command would you use to reset a modem? A. ATD B. ATDH C. ATDT D. ATZ | |
| 52 . What would the modem command ATS0=0 accomplish? A. The modem will never answer B. The modem will answer on the first ring C. The modem will never dial out D. The modem will not dial pulse | |
| 53 . You successfully map a network drive in windows 95, but every time you restart the computer, the drive seems to disappear. Why? A. The network computer was moved B. The network computer's shared directory was renamed C. You should add "lastdrive=Z" in config.sys file D. You should check "reconnect at login" check box | |
| 54 . 14.4 modem should transmit _____ bits per second A. 140-150 B. 1400-1500 C. 14,400-15,000 D. 140,000-150,000 | |
| 55 . On a leased line installation a known good external modem shows no carrier detect light. Where is the problem most likely to be? A. In the modem B. In the phone line C. In the DTC equipment D. In the computer | |
| 56 . In order for a modem to accept data, which of the following signals must be present? (choose all that apply) A. Data detect B. Carrier detect C. Transmit message D. Receive data | |
| 57 . What does Full Duplex mean? A. Simultaneous Transmit and Receive B. Transmit and Receive but not simultaneous C. Transmit for a set period then receive | |
| 58 . Your external modems RTS LED is lit what does this mean? A. Return to sender B. Run to serial C. Request to send D. run the sound | |
| 59 . The term Modem means. A. Modulator/Demodulator B. Modern Data Emulation C. Modern Data Emission Module D. Modular Data Emulator | |
| 60 . Your external modem fails to initialize. Check the________first? A. Phone line B. Serial cable C. Modem driver | |
| 61 . LAN stands for Local Analog Network A. True B. False | |
| 62 . A Token Ring can communicate in any direction. A. True B. False | |
| 63 . _____is the slowest type of LAN. A. Token Ring B. Arcnet C. Ethernet | |
| 64 . Which cable type offers the most security? A. Coaxial B. Twisted pair C. Shielded twisted pair D. Fiber optic | |
| 65 . Which statement is not true about a repeater? A. It regenerates network signals so they can travel farther. B. They are primarily used in linear cable systems C. Every node on the network must have the same address D. All segments must have the same access address. | |
| 66 . A gateway can be a computer. A. True B. False | |
| 67 . Which statement is not true statement about bridges? A. Some bridges can translate protocols B. A bridge can be used to split a network into two segments C. A bridge can not be used in an Arcnet LAN | |
| 68 . A router is more versatile than a bridge A. True B. False | |
| 69 . An outside terminator is used with what cable? A. TP B. STP C. Coaxial D. All of above | |
| 70 . In a peer-to-peer LAN a workstation can be a client and server A. True B. False | |
| 71 . To have a client-server LAN you must use _______? A. 2 computers and a printer B. 3 computers. C. 2 computers | |
| 72 . Ethernet uses a________ topology? A. Star B. Bus C. Ring | |
| 73 . Token Ring uses a________ topology? A. Star B. Bus C. Ring | |
| 74 . Arcnet uses a________ topology? A. Star B. Bus C. Ring | |
| RETURN TO TOP | |
| 75 . Ethernet, Tokenring, and Arcnet are_____? A. Topologies B. Buses C. Protocols | |
| 76 . What is not an example of a network? A. LAN (Local Area Network) B. WAN (Wide Area Network) C. MAN (Metropolitan Area Network) D. NAN (National Area Network) | |
| 77 . In modems that support more than 300 baud, baud and bps do not mean the same thing. A. true B. false | |
| 78 . "bps" stands for bits per second. Baud is the number of discrete signals per second. One discrete signal can encode more than one bit. Hence, a 9600 bps modem actually operates at 2400 baud. A. true B. false | |
| 79 . ISDN stands for: A. integrated services digital network B. internal select data networks C. inferior sector data network D. integrated sector direct next | |
| 80 . ISDN uses _______________ technology A. only digital B. only analog C. neither digital nor analog D. digital and analog | |
| 81 . Your modem does not respond when you try to dial out. You try another modem on another computer and get the same result. What is the most likely problem? A. software bug B. defective modem C. defective computer D. bad phone line | |
| 82 . The layer of the OSI model whose most important role is to provide error checking . A. Session B. Presentation C. Application D. Transport | |
| 83 . This is the type of media access method used by NICs that listen to or
"sense" the cable traffic, and send only when they hear that no one else is transmitting; A. token passing B. demand priority C. CSMA/CD D. CSMA/CA | |
| 84 . This access method asks the other workstations for permission to transmit before transmitting. A. token passing B. demand priority C. CSMA/CD D. CSMA/CA | |
| 85 . A physical star topology consists of several workstations that branch off of a central device called a _______. A. hub B. repeater C. router D. brouter | |
| 86 . This topology uses the least amount of cabling, but also covers the shortest amount of distance. A. bus B. star C. mesh D. ring | |
| 87 . These devices can switch and route packets across multiple networks and
use routing tables to store network addresses to determine the best destination. A. bridges B. gateways C. routers D. brouters | |
| 88 . This layer describes how the data gets over a physical medium. A. Application B. Data link C. Physical D. Session | |
| 89 . Uses a thin baseband coaxial cable, bus topology,
transmitting at 10Mbps, with a distance up to 185 meters. A. Token ring B. Ethernet 10Base2 C. Ethernet 10Base5 D. Ethernet 10BaseT | |
| 90 . This is a routable protocol used by Unix clients. A. TCP/IP B. NetBEUI C. IPX D. XNS | |
| 91 . Which of the following is an important setting
on a token-ring network card that can effect the whole network?? A. DMA channel B. IRQ C. transport protocol D. ring speed | |
| 92 . What component on a network card is responsible for signal conversion between the PC and the network media? A. Transponder B. Transceiver C. NIC Processor D. Media Access Control | |
| 93 . An FDDI network uses which method to control traffic? A. CSMA/CD B. CSMA/CA C. Token Passing D. X.25 | |
| 94 . Protocols such as TCP/IP and IPX/SPX operate at the _______ layer of the OSI model. A. Physical B. Network C. Transport D. Application | |
| 95 . Upon getting the no carrier message when using your modem, what can you do? A. Type ATM2Ll2 B. Disable call waiting C. Change jumper settings on the modem D. All of the above | |
| 96 . Which modems have UART chips? A. Voice capable modems B. Data/Fax Modems C. Win Modems D. UARTs are not used with modems | |
| 97 . What type of modem can only send data? A. simplex B. half-duplex C. full-duplex D. modulator | |
| 98 . What low speed modulation actually uses a separate frequency to represent ones and zeros? A. shift-keying B. dual-line C. frequency modulation D. differential phase-shifting | |
| 99 . SMTP is a protocol used for what purpose on the Internet? A. WWW access B. Management C. E-Mail D. File transfers | |
| 100 . What type of files are the basis for Web pages? A. .exe files B. .com files C. .dll files D. .html files | |
| 101 . What utility would you use to view who is accessing shared resources on your WIN 95 machine? A. System Monitor B. Net Watcher C. System Agent | |
| 102 . Which of the following is not internet related? A. POP3 B. FTP C. X.400 D. HTML | |
| 103 . Dial up server is a feature that is built into Win 95. A. True B. False | |
| 104 . In a peer to peer network, a work station can be a client and server. A. True B. False | |
| 105 . Which type of environment uses a dedicated server of some kind? A. Peer to Peer B. IBM SNA C. Client Server D. Gateway | |
| 106 . WIN 95 supports what kind of networking by default? A. Peer to Peer B. Client Server C. Domain D. WAN | |
| 107 . It is possible for WIN 95 to keep a modem log. A. True B. False | |
| 108 . Which statement best describes the differences between synchronous
and asynchronous transmissions? A. Asynchronous transmissions send data bits with an accompanying clock pulse. Synchronous transmissions send data bits without an accompanying clock pulse. B. Synchronous transmissions send data bits with an accompanying clock pulse. Asynchronous transmissions send data bits without an accompanying clock pulse | |
| 109 . What is the purpose of a parity bit when used in data communications? A. To be used by the receiving system as an error checking mechanism. B. To boost the data signal being sent. C. To keep the data signal being sent the correct polarity. | |
| 110 . What is the primary function of an UART ? A. To provide a buffer for the CPU. B. To provide serial to parallel conversions. C. They provide synchronous transmissions. D. To handle the serial interface of a computer bus. | |
RETURN TO TOP
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| MODEM COMMANDS | |
| COMMAND | FUNCTION |
| ATA | ANSWER |
| ATD | DIAL |
| ATDL | REDIAL |
| ATF1 | HALF-DUPLEX OFF |
| ATHN | HANG UP |
| ATMN | SPEAKER ON/OFF |
| ATSR | DISPLAY REGISTER |
| ATH | HANGS UP MODEM |
| HOW A MODEM OPERATES | ||||||
| MODULATION | DEMODULATION | |||||
| DIGITAL (BINARY) |
TO | ANALOG (TONES) |
PHONE LINE |
ANALOG (TONES) |
TO | DIGITAL (BINARY) |
| RETURN TO TOP | ||||||
| O S I / R M | |||
| LAYER # |
LAYER NAME |
PROTOCOLS USED |
DESCRIPTION COMMENTS |
| 7 | APPLICATION LAYER |
SMTP BOOTP FTP HTTP AFP SNMP SMB X.500 NCP NFS Telnet Gopher |
User interface, supports file transfer and network management, controls data flow and error recovery. |
| 6 | PRESENTATION LAYER |
Determines the "format" of the data, network security, and file transfers. Data translation and encryption are handled at this layer. | |
| 5 | SESSION LAYER |
Establishes, manages and terminates network sessions, enables network procedures such as identifying passwords, logons and traffic flow. | |
| 4 | TRANSPORT LAYER |
TCP SPX NWLink ATP NetBEUI |
Provides error-checking and reliable end-to-end communication, supports end-to-end error recovery and data flow control. |
| 3 | NETWORK LAYER |
IP IPX NWLink DDP NetBEUI X.25 Ethernet |
Organizes data into "datagrams" or packets, addresses messages and translates logical names and addresses into physical addresses, determines best data path based on network conditions. |
| 2 | DATA LINK LAYER |
Provides reliable data transfer across the physical link, prepares the information so it can be placed on the transmission medium. | |
| 1 | PHYSICAL LAYER |
Describes how data is transmitted over the physical medium. Defines how long each piece of data is and the translation of eachninto electrical pulses that are sent over the wire. It also relates electrical, optical, mechanical and functional interfaces to the cable. | |
| RETURN TO TOP | |||
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