Basic Networking Class
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| Define bandwidth | Range of frequencies that a comm. media can carry.
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| Define baseband | digital signals sent over a cable without modulation.
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| 3. What surrounds the center conductor in a coaxial cable to separate it from the wire braid? | insulating layer
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| 4. The type of fiber optic connector that provides high density and requires only one connector for two cables is the | MT-RJ
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| 5. The condition that requires cables not to exceed a recommended maximum length is called | attenuation
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| True or false: 802.17b is a wireless networking standard | False.
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| 7. The space between a false ceiling and the true ceiling where heating and cooling air circulates is called ______. | plenum
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| 8. Cable sheathed with ______ material should not be routed in ceiling or walls: | PVC (polyvinyl chloride)
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| 9. The fire-resistant cable specified by fire and building codes is rated as ______. | plenum
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| To build the network in your NYC HQ, you must run a cable through the elevator shaft from the customer service center on the second floor, all the way up to corporate offices on the 37th floor. The distance is 550 meters. What type of cable must you use? | fiber-optic cable
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| 11. What type of cable is not suitable for network use of any kind? | Cat1
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| 12. What type of connector is most commonly used with TP network wiring? | RJ-45
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| 13. Both Category 3 and Category 5 cable can be used for 100 Mbps Ethernet. True or false? | True (category 3 can be used if employing 10BaseTX4)
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| 14. You are hired to install a network at a large government agency. The agency wants to reduce the likelihood of electronic eavesdropping on their network. What kind of cable should you use? | fiber-optic
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| 15. You’re preparing to install a conventional Ethernet network in your new office building, but your boss tells you to be ready to handle a switchover to 1 Gbps Ethernet in two years. What two types of cable could you install? | cat6 and fiber-optic
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| 16. When two cables run side-by-side, signals traveling down one wire may interfere with signals traveling on the other wire. What is this phenomenon called? | crosstalk
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| 17. XYZ Corp. operates a 10 Mbps network based on twisted-pair media. When the network administrator goes to the supply room looking for some network cable to add a new station, he finds a suitable length that is labeled Category 2. Will this cable work? | No.
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| 19. What benefits does shielding confer on shielded twisted-pair cable? | lowers susceptibility to interference & supports higher bandwidth over longer distances
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| 20. If you want to share an Internet connection among three home computers, but find it difficult to run cables, what type of network should you use? | 802.11b
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| 21. You currently are using 802.11b wireless in your LAN but are considering an upgrade to 54 Mbps speed. For best compatibility, which wireless standard should you choose for this higher bandwidth? | 802.11g
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| 22. Baseband transmission sends signals in which of the following forms? | digital
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| 24. The devices used to manage transmission and reception of data between a wired LAN and wireless components are ______. | access points
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| 25. The device used to link buildings without cable is a wireless ______. | bridge
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| 26. Which of the following technologies might be used in a wireless LAN? | narrow band radio, microwave transmission, infrared, laser
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| 27. Spread-spectrum transmissions occur in which of the following forms? | frequency hopping & direct-sequence
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| 28. Which of the following wireless technologies would not be appropriate to link two buildings? | reflective infrared & low power, single frequency radio
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| 29. Which new wireless standard can be used in place of a wired last-mile? | 802.16a WiMax
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| 30. What is the distance limitation for Category 5E UTP running 100 Mbps Ethernet? | 100 meters
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| Define Parallel Transmission | parallel data comes to the NIC and is sent out serially
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| Define Serial Transmission | data is received serially and converted to parallel
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| Define Bus | sends data between CPU and adapter cards
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| Define Bus Width | The number of parallel lines
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| Define Buffer | holding space for outgoing & incoming transmissions
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| Define ISA | early standard, obsolete now. *8 and then 16 bit
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| Define EISA | Acronym for Extended Industry Standard Architecture, a bus architecture designed for PCs using an Intel 80386, 80486, or Pentium microprocessor. EISA buses are 32 bits wide and support multiprocessing.
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| Define packet | formatted packet of data for transmission and reception
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| Define frames | The unit of information handled by the NIC.
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| Define MCA | A bus architecture for older PCs. It is called a bus architecture because it defines how peripheral devices and internal components communicate across the computer's expansion bus. Introduced by IBM in 1987, 32 Bit.
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| Define PCI | 32 and 64 bit.
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| Define PCI-X | Short for PCI extended, an enhanced PCI bus. PCI-X is backward-compatible with existing PCI cards. It improves upon the speed of PCI from 133 MBps to as much as 1 GBps.
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| Define PC Cards | Designed for laptops. various functions including ethernet cards & dial-up modems.
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| Define AGP | for graphics.
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| Define PCI Express | PCI Express is an implementation of the PCI Bus that uses existing PCI programming concepts, but bases it on a completely different and much faster serial physical-layer communications protocol.
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| Define USB | slow serial interface. 2.0 is 40x faster.
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| Define Firewire | High speed serial bus that operates @ bandwidths up to 400 mbps.
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| Define POST | Diagnostic testing sequence run by BIOS as the power is initially turned on. The POST will determine if the computer’s RAM, disk drives, peripheral devices and other hardware components are properly working.
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| Define IRQ | Abbreviation of interrupt request line, and pronounced I-R-Q. IRQs are hardware lines over which devices can send interrupt signals to the microprocessor
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| Define DMA | Short for direct memory access, a technique for transferring data from main memory to a device without passing it through the CPU.
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| Define Bus Width | Pick PCI or PCI-X
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| Define Bus Type | 64-bit PCI-X for servers
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| Define Memory Transfer | shared memory is better than I/O or DMA
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| Bus Mastering and servers - is this important? | Feature supported by some bus architectures that enables a controller connected to the bus to communicate directly with other devices on the bus without going through the CPU. Most modern bus architectures, including PCI, support bus mastering.
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| Define BootProm | lets a diskless computer boot off the network.
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| Define Network Device Interface Specification | NDIS defines a communications interface between the MAC sublayer & network interface driver. Can use multiple protocols at the same time.
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| Define Win32 Driver Model | WDM - defines a complete adapter card interface for PCs that run modern 32-bit OS's. Generic drivers can handle basics; programmers focus on specs.
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| Define Open Data-Link Interface | ODI - allows multiple protocols but also simplifies driver development.
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| Define HCL | Hardware Compatibility List
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| Define base memory address | mem. address at which transfer area begins
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| Define transceiver | a device that receives and transmits network information
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| Define shared adapter memory | allows a CPU to address memory on an adapter as if it were its own.
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| Define shared system memory | allows an adapter to address memory on a computer as if it were its own.
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| Define 10Base2 (thinnet) | 802.3 Ethernet thin coax (thinnet). 10=10mbps, Base=baseband, and 2=max length of 185 meters.
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| Define 10Base5 (thicknet) | 802.3 Ethernet thick coax 10=10mbps, Base=baseband, and 5=max length of 500 meters.
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| Define 10BaseT | 802.3 Ethernet twisted-pair. 10=10mbps, Base=baseband, T=twisted-pair. max length of 100 meters
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| Define Bend Radius | maximum arc cable may be bent without damage.
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| Define Braiding | Woven mesh of metallic wire around one or more conductive cables. Provides shielding against EMI, RFI, & crosstalk from other cables.
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| Define EMI | Electro-magnetic interference.
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| Define RFI | Radio Frequency Interference.
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| Define Crosstalk | happens when two wires lay against each other in parallel. Signals on one can interfere with signals on the other.
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| Define Conduit | plastic or metal pipe to provide a protected enclosure for cable of any kind.
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| Define Medium Interface Connector (MIC) | A type of fiber-optic connector type.
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| Define MT-RJ | A fiber-optic connector that provides a high-density connection utilizing two fiber-optic cables
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| Define Narrow-band radio | single, specific radio frequency to send and receive data. Approx. 250 foot range.
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| Define RJ-11 | used for phones.
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| Define RJ-45 | eight-wire modular jack used for TP networking cables and also PBX-based phone systems.
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| Define Scatter infrared network | Infrared LAN technology that bounces signals off of walls etc. Slow and subject to attenuation.
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| Define STP (Shielded Twisted Pair ) | A variety of TP w/ a foil wrap around one or more pairs of wires for add. shielding w/ poss. one more layer of foil around all wires.
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| Define Straight Connection | Fiber-optic connector that is pushed on yet makes a strong and solid contact w/ emitters & sensors.
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| Define Straight Tip | Most common type of fiber-optic connector used in ethernet networks w/ fiber backbones. They come in pairs.
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| Define SMA (Subminiature type A) | Fiber-optic connector which twists on and also comes in pairs.
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| Define Twisted Pair | Type of cabling where two copper wires, each in a sheath, are wrapped around each other.
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| Define hexadecimal | A mathematical notation for representing numbers in base 16.
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| 1. The term ________ refers to the physical layout of a network’s computers, cables, and other resources. | Topology
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| 2. Joining together the computers in a network at a central point creates a star topology. Which of the following statements is true of a star topology network? | It requires significantly more cabling than a bus network.
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| 3. A bus topology network does not require terminators. True or false? | False.
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| 4. Which of the following statements is true of a ring topology network? | b. It provides equal access to all computers on the network.
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| 5. The _________ topology is the most fault tolerant of the hybrid designs. | Mesh.
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| 6. What are two advantages of a star topology network? | inexpensive, easy to troubleshoot and configure
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| 7. What cable type is most often associated with a bus topology network? | coaxial
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| 8. A cable break in a bus network does not affect network communications. True or false? | False
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| 9. In a bus network, if the ends of the cable are not terminated, _________________ occurs | Signal bounce
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| 10. Connecting computers to form a straight line creates a(n) _______________ topology network. | bus
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| 11. How do switches provide better performance than hubs? | by providing full bandwidth to each port rather than by sharing bandwidth, as hubs do
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| 12. Because of its central connection point, a(n) _________ topology network requires a more intricate cable installation. | star
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| 13. What is the name of the central point through which signals pass in a wireless network? | Access Point
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| 14. What are two disadvantages of a ring topology network? | A single computer failure on a single-ring topology can impact the rest of the network; it can sometimes be difficult to isolate problems on a ring.
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| 15. What type of network can use an ad-hoc topology? | wireless
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| 16. List three reasons to keep a network diagram current. | It keeps an accurate inventory of equipment, cables, and ancillary equipment; maintains indicators of what construction activities might impact the network, and provides a complete record of a network's carrying capacity as a tool for planning for growth
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| 17. What type of device is usually found at the center of an extended star topology? | A hub OR a switch
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| 18. What term describes the special packet used in ring networks? | token
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| 19. A cable break in a star topology network does not affect network communications for the entire network. True or false? | True
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| 20. FDDI is a form of which standard topology? | ring
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| Define FDDI | FDDI networks are token-passing networks, and support data rates of up to 100 Mbps (100 million bits) per second. FDDI networks are typically used as backbones for wide-area networks.
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| 21. A ring network is a(n) _____________ topology network because the computers are responsible for regenerating the signal. | Active
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| 22. Mainframe computers first used the ______________ topology. | star
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| 23. A(n) _______ hub regenerates the signals it receives and sends them down all other ports. | multiport
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| 24. Which device is used as a passive hub? | patch panel
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| 25. Which topology works best when running time-critical applications that require every station to be able to send data within a given time period? | ring
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| Switch | A hardware device that opens and closes electrical circuits, completes or breaks an eletrical path, and selects paths or circuits
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| Passive Hub | Simply a central connection point. Nothing happens really.
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| Hybrid Hubs | used to connect different types of cables
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| Active Hub | regenerates or repeats the signal and sends it along
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| Unshielded Twisted Pair | A form of TP that includes no additional shielding material in the cable composition. Encloses one or more pairs of twisted wires in an outer jacket.
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| Bridge | A networking device that works at the Data Link layer of the OSI model. It filters traffic according to packet's hardware destination address.
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| Spread-Spectrum | Spread-spectrum techniques are methods in which energy generated at a single frequency is deliberately spread over a wide band of frequencies. This is done for a variety of reasons, including increasing resistance to natural interference or jamming and to
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| MT-RJ | A fiber optics connector type. The MT-RJ uses a form factor and latch like the RJ-45 connectors, supports full duplex, has lower cost than ST or SC connectors, and is easier to terminate and install than ST or SC. Further, its smaller size allows twice th
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| Define Cat 2 | Category 2 is a description of network cabling that consists of four UTP wires with a data rate of 4Mbps and was used in token ring networks, ARCNET, and is still used in some phone systems.
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| Define Cat 3 | Category 3 is a description of network cabling that consists of four UTP wires with a data rate of 10Mbps and was used in token ring networks, 10BASE-T, and is still used in some phone systems.
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| Define Cat 4 | Category 4 is a description of network cabling that consists of four unshielded twisted-pair (UTP) wires with a data rate of 16 Mbit/s and was used in token ring networks, 10BASE-T, 100BASE-T4, and is no longer common or used in new installations.
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| Define Cat 5 | network cabling that consists of 4 twisted pairs of copper wire terminated by RJ45 connectors. Cat-5 cabling supports frequencies up to 100 MHz and speeds up to 1000 Mbps. Can be used for ATM, token ring, 1000Base-T, 100Base-T, and 10Base-T networking
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| Define Cat 5E | Provides performance of up to 125 MHz, and is frequently used for 1000BASE-T gigabit ethernet.
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| Define Cat 6 | is a cable standard for Gigabit Ethernet and other network protocols that is backward compatible with the Category 5/5e and Category 3 cable standards. Cat-6 features more stringent specifications for crosstalk and system noise. the max length is 90 m.
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| Wireless Bridge | A wireless bridge is used for connecting two or more network segments separated physically, operating on the 802.11 standard. Wireless bridges usually work only in pairs or more, and can be used in two types of implementations.
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| Token Ring | Computer network in which all the computers are arranged (schematically) in a circle. A token travels around the circle. A computer catches the token, attaches a message to it, and then lets it continue to travel around the network.
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Created by:
julio