CompTIA Network+ Practice Tests. Craig Zacker
Читать онлайн книгу.
Wide Area Network (WAN) connection technologies uses analog signaling?Public Switched Telephone Network (PSTN)Cable television (CATV)Digital Subscriber Line (DSL)Synchronous Optical Network (SONET)
58 If you want to allow both voice and data traffic to be transmitted across the same Digital Subscriber Line (DSL) connection, what type of device is required at the customer site?A signal terminatorA Digital Subscriber Line Access Multiplexer (DSLAM)A coder/decoder (CODEC) deviceA splitter
59 What are the two main factors that affect DSL (Digital Subscriber Line) transmission rates?Signal terminationDistance to the nearest central officeLine conditionsLine reflection
60 Which of the following best describes the function of a demarcation point or demarc?The vertical cross-connect that links horizontal networks togetherThe place where an outside service enters the buildingA switch or hub that connects the computers in a particular work area together, forming a horizontal networkThe place in a telecommunications room where a patch panel is located
61 Which of the following broadband WAN services provides equal amounts of upstream and downstream bandwidth?ADSLSDSLSatelliteCable
62 Which of the following hardware components is typically found at the demarcation point of a leased line, such as a T-1 or T-3?TerminatorPunchdown block110 blockSmartjackCSU/DSU
63 Which of the following remote access connection technologies can support the simultaneous transmission of voice and data traffic over the Public Switched Telephone Network (PSTN)? (Choose all that apply.)Dial-up modem connectionIntegrated Services Digital Network (ISDN)Digital Subscriber Line (DSL)Synchronous Optical Network (SONET)Cable television (CATV) network
64 A company is moving their entire operation to a new building, and part of the plan is to increase the speed of their Internet access by installing a leased T-3 line to replace their existing broadband connection. The service provider they have selected sends a technician to install the leased line. Which of the following is the correct term for the location in the new building where the technician will terminate the T-3?Patch panelSwitchFirewallDemarc
65 A T-3 leased line connection runs at 44.736 megabits per second (Mbps). How many separate channels does a T-3 provide?2464128512672
66 A T-3 leased line connection is the equivalent of how many T-1 connections?71428112
67 Which of the following is the U.S. standard for synchronous data transmissions that defines data rates designated by optical carrier levels, such as OC-3, OC-12, OC-48, and OC-192?SDHSONETISDNDSL
68 Which of the following is a wide area networking mechanism that assigns labels to packets and forwards them based on those labels, rather than addresses?Frame relayMPLSATMPPPoESDWAN
69 Which two of the following constructs provide roughly the same function? (Choose two that apply.)SIP trunkCSU/DSUVoIP gatewaySmartjackVPN concentrator
70 Which of the following is the European equivalent of the Synchronous Optical Networking (SONET) standard in the United States?SDHOC-3E-3ATM
71 Which of the following is the device that provides the interface between a Local Area Network (LAN) and a Wide Area Network (WAN)?QSFPCSU/DSUSIP trunkIDS/IPS
72 Which of the following terms describes a leased line subscription that provides access to only part of a T-1?E-1B channelOC-1Fractional T-1
73 Multiprotocol Label Switching (MPLS) is sometimes said to operate between two layers of the Open Systems Interconnection (OSI) model. Between which two layers is it usually said to function?Physical and data linkData link and networkNetwork and transportTransport and Session
74 Which of the following Wide Area Network (WAN) services provides the fastest transfer rate?T-1E-1T-3OC-1
75 To which of the following Internet connection types does a specification called DOCSIS apply?Dial-up modemDSLCable broadbandISDN
76 Which of the following are types of circuits offered by frame relay services? (Choose all that apply.)SRVPVCSVCUPC
77 Which of the following types of Wide Area Network (WAN) connections commonly use Point-to-Point Protocol over Ethernet (PPPoE)? (Choose all that apply.)Leased linesSONETCable broadbandDigital Subscriber Line (DSL)
78 Which of the following devices often provides diagnostic testing capabilities at the demarcation point of a leased line Wide Area Network (WAN) service?SIP trunkMedia converterSmartjackAAAA server
79 Which of the following Wide Area Network (WAN) services typically uses a switched fabric that was called a cloud long before the term came into general use?ATMFractional T-1SONETFrame relay
80 Ralph has been contracted to consult for a company that wants to update its legacy Ethernet network to Gigabit Ethernet. On examining the site, he discovers that the network is still using coaxial-based Thin Ethernet. What change in network topology must occur to upgrade the existing network to Gigabit Ethernet using Unshielded Twisted Pair (UTP) cable?Bus to RingRing to StarStar to BusBus to StarStar to Ring
81 Which of the following best describes the function of a vSwitch (or virtual switch)?A vSwitch is a software product that enables a computer with multiple network adapters to function as a switch.A vSwitch is a feature in layer 3 switches that enables VLANs on the same switch to communicate with each other.A vSwitch is a feature in layer 3 switches that enables VLANs on different switches to communicate with each other.A vSwitch enables virtual machines (VMs) running on the same hypervisor to communicate with each other internally.
82 Which of the following statements best describes the difference between Type I and Type II virtualization?Type II virtualization requires the host computer to have a processor that supports hardware virtualization assistance; Type I virtualization does not.In Type I virtualization, the hypervisor runs directly on the physical computer hardware, whereas in Type II virtualization, a host operating system runs on the computer hardware and the hypervisor runs on top of the host OS.Type I virtualization supports up to 256 virtual machines, whereas Type II virtualization supports only 8.Type I virtualization requires a separate processor for each virtual machine, whereas in Type II virtualization, the VMs all share a single processor.
83 On which of the following virtual networking components can you create VLANs?Virtual NICVirtual switchVirtual routerVirtual firewall
84 On an unmanaged network, which of the following virtual networking components have media access control (MAC) addresses assigned to them?Virtual switchesVirtual NICsHypervisorsVirtual firewalls
85 Which of the following components is responsible for providing a virtualized hardware environment and running virtual machines?HypervisorVirtual servervSwitch (virtual switch)VPN concentrator
86 Which of the following is the proper term for a computer with a hypervisor on which you can create virtual machines and other virtual components?GuestNASHostSAN
87 In which of the following ways does a vSwitch (virtual switch) differ from a physical switch?Virtual switches have an unlimited number of ports, whereas physical switches have a specific number.Physical switches typically support the creation of VLANs, whereas virtual switches do not.Virtual switches cannot forward traffic to the host server running them, whereas physical switches can forward traffic to all connected computers.Physical switches always include layer 3 functionality, whereas virtual switches do not.
88 In which of the following components can a virtual firewall be implemented?On a host operating systemOn a guest operating systemIn a dedicated virtual machineIn a virtual switchAll of the above
89 Which of the following technologies can replace leased lines, such as T-1s, by multiplexing signals as packets switched through virtual circuits in a cloud?E-1sFrame relayATMPPP
90 Which of the following is not a protocol that uses tunneling to establish secured links between TCP/IP systems?L2TPIPsecMGRENAT
91 Which of the following is not one of the primary components of the Network Function Virtualization (NFV) framework?VNFNFV ISGNFVINFV-MANO
92 Which of the following best describes the function of the network medium?The network medium provides the physical connection between networked computers.The network medium provides the protocol used to transmit data between end systems.The