Progression: Field Tech IV - V Conventional Questions and Answers 100% Correct (Graded A+)

Progression: Field Tech IV - V Conventional Questions and Answers 100% Correct (Graded A+) . Which of the following is most typical of a broadband network? - Multiple analog channels What components are common to all computer systems? (Check all that apply.) - Processor Memory Storage I/O What does I/O stand for? - Input / Output A NIC is a device used for: - Signaling A sound card is what general type of computer component? - Input/output Which of the following is managed by the OS? - Keyboard input Screen display File I/O Peripheral control The primary purpose of a device driver is to control hardware under the supervision of the OS. True or False? - True Which of the following network topologies forms a closed loop? - Ring topology Which of the following network topologies connects devices to a shared straight-line cable? - Bus topology M1L5 When is UTP cable preferred over STP? - When there is little electrical interference Which connector type is used with Thinnet coaxial cable? - BNC Which of the following cable types uses a T-connector to connect each NIC to the cable? - Thinnet Which of the following cable types can transmit data farthest? - Fiber optic How are bits represented on fiber optic cable? - Pulses (on/off) of light Which of the following are the two primary types of light sources in fiber optic cables? - Laser diode and LED What is the main advantage of star topology? - Ease of management Which of the following would not be used in a typical star topology? - Thinnet How many wire pairs can be terminated on a 66 block? - 25 or 50 What makes a crossover cable different from a patch cord? - A crossover cable uses the 568A pattern on one jack, and the 568B pattern on the other. A patch cord uses the same pinout pattern on both jacks. What is the key reason that smart LAN administrators demand well-made cable connections? - Bad cable connections degrade a network's performance. What is the main advantage of using balanced signaling on a serial cable? - The cable can be longer because balanced signaling is less vulnerable to interference. What term describes the number of wave crests that pass a fixed point during a particular period of time? - Frequency In data networking, this term is defined as "Signals may flow in either direction, but not simultaneously". - Half-duplex Two CPUs have the same size data bus. Which one will process data faster? - The one with a higher clock speed This unique ID number is coordinated by the Institute of Electrical and Electronics Engineers and is used by only one network interface card anywhere in the world. - Media access control address (MAC) Which is a network management and utility software that is typically used by network administrators and information systems personnel when the network is unused or lightly used, often in the middle of the night? - Backup and recovery utilities Which of the following is also called "Thicknet" or "yellow wire" and includes two layers of foil shielding as well as an additional copper mesh shield? - 10Base5 cable According to 10BaseT wiring rules, what is the maximum segment length without a repeater? - 100m When light travels through a fiber-optic cable, the change in refractive index causes the light to refract off which of the following? - The boundary between the core and the cladding Which of the following requires a laser transmitter? - Single-mode fiber In what part of a building would you typically find punch-down blocks? - Wiring closet Which OSI model layers are concerned primarily with applications? - The top three Which layers are primarily concerned with moving raw data? - The lower four Which of the following is the primary purpose of a Physical Layer protocol? - Transmit bits across a physical link Which of the following will not occur at the Physical Layer? - Rerouting of information Which of the following is the primary purpose of a Data Link Layer protocol? - Transmit frames across a physical link Which of the following hardware devices builds a frame? - NIC Frame headers and packet headers contain addresses. True or False? - True Which of the following is an example of a Network Layer protocol? - IP The Network Layer is to packets as the Data Link Layer is to: - Frames Which of the following is the primary purpose of a Transport Layer protocol? - Transmit messages from process to process The Transport Layer is not concerned with which of the following? - None of the above Which layer uses port numbers for communication? - Transport Layer The Session Layer is concerned with which of the following? - Managing dialog Beginning dialog Ending dialog The OSI model Presentation Layer does which of the following? - Manages the way computers read information Encrypts and decrypts information Is concerned with the order of bytes and integers Which activities occur at the Application Layer? - File transfer and access email Web browser Encapsulation and protocol headers, decapsulation, and reassembly are three of the four basic techniques used whenever different layers of protocols work together. What is the fourth? - Segmentation Which type of address is unique anywhere in the world? - NIC address Which layer of the OSI protocol stack handles frames? - Data Link Which of the following best represents a logical address? - IPv6 In data networking, ________ describes the characteristics of a transmission link, such as throughput, setup time, or accuracy. - Quality of service (QoS) Transport layer processes work with transmission channels using multiplexing and ___________ techniques. - Parallelization Which of the following protocols is commonly used in the Session Layer? - Advanced Program-to-Program Communications (APPC) What is the binary equivalent to the decimal number "14"? - Data security, data compression, and ________ are the three main services that the Presentation Layer provides. - Data representation Which of the following is an example of a Transport Layer protocol? - Transmission Control Protocol (TCP) Ethernet operates at all speeds except which of the following? - 16 Kbps Which of the following is the most popular LAN Data Link Layer technology? - Ethernet An Ethernet LAN that uses UTP cabling and a hub as the physical medium is referred to as which of the following? - Star The CD in CSMA/CD refers to the ability of an Ethernet node to do which of the following? - Detect frame collisions The CS in CSMA/CD refers to the ability of an Ethernet node to do which of the following? - Sense an electrical signal Collisions are normal on CSMA/CD LANs and not usually the result of errors. True or False? - True Which of the following is another name for a CO? - Local exchange Which of the following is the primary difference between a public and private network? - Who owns and maintains the network Which of the following WAN services usually provides the highest bandwidth? - SONET Which of the following is the unit of data transferred by an ATM network? - Cell Why is ATM better for multimedia? - All cells are the same size. Cells are small. ATM runs over fast fiber optics. WANs are shifting away from switched services and increasingly using dedicated network services. True or False? - False A frame relay network uses fewer lines to connect 10 locations than a T1 mesh, and is therefore more cost effective. True or False? - True ATM requires fiber media to run. True or False? - False Carrier sense multiple access with collision detection (CSMA/CD) is most like which of the following? - An informal conversation in which each person speaks when the opportunity presents itself, but only one person speaks at any time The IEEE 802.3 standard defines which of the following? - Ethernet What Fast Ethernet standard can send Ethernet frames at 100 Mbps over Category 5E UTP or fiber optic cabling? - IEEE 802.3u What enables the transport of computer data over analog telephone local loops? - Telephone modems. Which of the following describes the bandwidth of a single FT1? - 64 Kbps How much bandwidth in a T1 circuit is allocated for control information? - 8 Kbps. What device is required to attach a non-ISDN device to an ISDN network? - Terminal adaptor (TA) Which of the following is a connection-oriented packet-switched network service that works at the Data Link Layer? - Frame relay What is a private, internal network that uses Internet applications, tools, and protocols? - Intranet Which of the following is implemented over a public telecommunication switching system, such as a frame relay cloud? - A public network Hubs and repeaters operate at which layer of the OSI model? - Physical Layer Which of the following is a function of hubs and repeaters? - Provide for cable extension Repeat digital signals Interconnect different cable types At which OSI layer do bridges operate? - Data Link Layer What is a broadcast frame? - A frame addressed to "all nodes" What do bridges require that hubs and repeaters do not? - Address tables Bridges are needed in which of the following situations? - Too much traffic on the LAN Remote connection of two LANs over a WAN link Segmenting traffic between different portions of a single LAN is referred to as: - Traffic isolation The two primary classifications of bridges are: - Transparent and source route At which OSI layer do switches reside? - Data Link Layer Can switches switch two frames simultaneously? - yes Which of the following devices isolate traffic in an Ethernet network? - Bridge Switch Router Performance will likely increase in an Ethernet network when which of the following occurs? - Hubs are replaced by switches. At which OSI layer do routers operate? - Network Layer Which of the following scenarios requires a gateway? - Connecting an IP network to an AppleTalk network When a repeater receives a bit pattern at its input, what does it do? - It generates the same pattern at its output, at a higher power level Which of the following best represents a hub? - A repeater Forwarding, Learning, and _______ are three important functions provided by a bridge. - Filtering If a network contains an active loop, what problem can occur? - The network becomes congested with duplicate frames Which of the following is defined as a set of device-to-device paths through the network such that there is one, and only one, path between any two devices? - Spanning Tree Protocol What is the main difference between a standard switch and a bridge? - Switches effectively multiply the network's bandwidth Bridges and Layer 2 switches filter traffic in which way? - By evaluating the destination MAC address in each frame and switching each frame to the port that leads to the destination frame address What happens when a router forwards data packets from one network to another network? - The destination address of the router in the framed packet is removed and the packet header address is inspected by the router to determine the next destination address to encapsulate around the packet. In large networks, how do most routers get their routing tables? - Each router automatically builds and maintains its own routing table ________ is an application that manages Internet resources and transmits them in response to requests from Web browsers. - HTTP server Which of the following is not a layer of the TCP/IP protocol stack? - Physical Layer How large is the IP version 4 address field? - 32 bits A Ping command uses which ICMP message types? (Choose three.) - Echo Reply Source quench Echo Request Which best describes IP's use of the TTL value? - The TTL specifies the time a datagram is allowed to remain on the network. An Application Layer utility transmits network administration and control messages between nodes. It must not use any more of the network's bandwidth than absolutely necessary. If messages are corrupted or lost, the utility handles retransmission, so it doesn't need this service from the lower layers. This application should use the services of: - UDP Which of the following applications use UDP services? (Choose three.) - DNS SNMP TFTP