CompTIA Network+ Practice Tests. Craig ZackerЧитать онлайн книгу.
session, transport, network, data link, physical
22 At which of the Open Systems Interconnection (OSI) model layers do switches and bridges perform their basic functions?PhysicalData linkNetworkTransport
23 On a TCP/IP network, flow control is a function implemented in protocols operating at which layer of the Open Systems Interconnection (OSI) model?PresentationSessionTransportNetwork
24 Which layer of the Open Systems Interconnection (OSI) model defines the medium, network interfaces, connecting hardware, and signaling methods used on a network?PhysicalData linkNetworkTransportSessionPresentationApplication
25 Which of the OSI model layers is responsible for syntax translation and compression or encryption?Data linkNetworkSessionPresentationApplication
26 Which layer of the Open Systems Interconnection (OSI) model is responsible for transmitting signals over the network medium?PhysicalData linkNetworkTransportSessionPresentationApplication
27 Specify the layer of the Open Systems Interconnection (OSI) model at which the Internet Protocol (IP) operates and whether it is connection-oriented or connectionless.Network; connection-orientedNetwork; connectionlessTransport; connection-orientedTransport; connectionless
28 An Ethernet network interface adapter provides functions that span which two layers of the Open Systems Interconnection (OSI) model?Physical and data linkData link and networkNetwork and transportTransport and application
29 Which of the following protocols operate at the application layer of the Open Systems Interconnection (OSI) model? (Choose all that apply.)HTTPSNMPICMPIGMPUDP
30 Which layer of the Open Systems Interconnection (OSI) model would be responsible for converting a text file encoded using EBCDIC on the sending system into ASCII code, when required by the receiving system?ApplicationPresentationSessionPhysical
31 Which of the following protocols operates at the network layer of the OSI model, but does not encapsulate data generated by an upper layer protocol for transmission over the network?IPUDPARPICMPTCP
32 A client on a TCP/IP network is attempting to establish a session with a server. Which of the following correctly lists the order of the TCP flags raised in the Transmission Control Protocol (TCP) session establishment messages?SYN, ACK, SYN, ACKSYN, SYN, ACK, ACKSYN/ACK, SYN/ACKSYN, SYN/ACK, ACK
33 Which of the following is the Maximum Transmission Unit (MTU) size for an Ethernet frame?512102415001518
34 Which of the following Transmission Control Protocol (TCP) control bits is set to 1 to initiate the termination of a session?SYNURGFINENDPSH
35 An electrician installing a new light fixture accidentally severs one of the LAN cables running through the dropped ceiling space. With which topology would the severed cable cause the greatest amount of disturbance to the network?BusStarLogical ringMesh
36 Which of the following statements about a wired Local Area Network (LAN) is true?Wired LANs support only the star topology.Wired LANs support only the star and bus topologies.Wired LANs support only the star and ring topologies.Wired LANs can support ring, bus, or star topologies.
37 Which of the following is an example of a hybrid topology?A workstation with two network interface cards, one of which is connected to a star network and one to a bus networkFour Ethernet switches connected using a bus topologyFour workstations, each with a separate network connection to each of the other threeFour Ethernet switches, each with a separate network connection to each of the other three
38 Which type of network is typically confined to a small area, such as a single room, floor, or building?WANLANMANCAN
39 Which type of network connects Local Area Networks (LANs) in distant locations?WANLANMANCAN
40 Which of the following topologies requires the installation of terminating resistors at two locations?BusStarRingMesh
41 Which of the following topologies is used by the majority of new Ethernet networks installed today?BusVirtual ringMeshHierarchical star
42 Alice has constructed a five-node failover cluster in which all five servers are connected to a hard disk array using a dedicated Fibre Channel network. Which of the following terms describes this network arrangement?SANPANWANMAN
43 Which of the following is not a technology typically used for a personal area network (PAN)?BluetoothZ-WaveNFCSDWAN
44 Which of the following network topologies are used by Wireless Local Area Networks (WLANs)? (Choose all that apply.)Ad hocBusInfrastructureStar
45 Which of the following cabling topologies was used by the first Ethernet networks?BusRingStarMesh
46 On an Ethernet network using the star topology, which of the following devices can function as the cabling nexus that forms the figurative center of the star? (Choose all that apply.)HubRouterSwitchAccess Point
47 Which of the following cabling topologies provides the greatest number of redundant paths through the network?StarRingMeshBus
48 Which of the following Ethernet physical layer options does not use the star topology?10Base210Base-T100Base-TX1000Base-T
49 Which of the following network types are typically wireless? (Choose all that apply.)WANPANSANWLAN
50 Dense Wave Division Multiplexing (DWDM) is a signaling technology that has become a popular choice in the construction of which of the following types of provider links?Digital Subscriber Line (DSL)Metro-opticalSatelliteCable
51 Which of the following statements is true about the differences between a peer-to-peer network and a client-server network?Peer-to-peer networks are inherently less secure than client-server networks.Peer-to-peer networks are illegal, while client-server networks are legal.On peer-to-peer networks, every workstation is capable of authenticating users.On a peer-to-peer network, all workstations must share their resources.
52 Why does DSL (Digital Subscriber Line) technology support faster data transmissions than a standard Public Switched Telephone Network (PSTN) modem connection?DSL uses a separate control circuit that provides clear channels for data.DSL does not perform Cyclic Redundancy Check (CRC) functions and therefore has less overhead.DSL performs only a single analog-to-digital conversion.DSL uses a higher frequency range.
53 Which DSL (Digital Subscriber Line) technology can adjust its transmission speed based on line conditions?HDSLIDSLRADSLVDSL
54 Which of the following Wide Area Network (WAN) technologies uses broadband signaling?Digital Subscriber Line (DSL)Synchronous Optical Network (SONET)Integrated Services Digital Network (ISDN)Cable television (CATV)
55 Ed has been hired by a private company to connect two remote sites with a Wide Area Network (WAN). Each of these sites has more than 200 users, and they all need to constantly transfer files across the WAN. One of the sites has a customer database that is accessed by both sites at all hours of the day. Access to the database and other information is time sensitive and constant. The company estimates that their aggregate bandwidth needs to be approximately 40 Mbps. Management says that they need to guarantee access to this information and that money is not a factor in the WAN implementation. Which WAN technology should Ed recommend for this scenario?A standard modem-to-modem connectionA T-3 dedicated leased lineA cable television (CATV) connectionAn ADSL (Asymmetrical Digital Subscriber Line) connection
56 Ralph is an employee of a company that offers the option to telecommute from home. As a telecommuting employee, he needs to connect to the company network to access client information, transfer files, and send email through a Virtual Private Network (VPN) connection. Ralph is investigating the different Wide Area Network (WAN) services available for the remote connection before he implements one. His home is over 30 years old; the existing telephone wiring was not run through conduit, and the wiring seems to be deteriorating. Ralph has cable television (CATV) service, and his home is also approximately 20,000 feet from the nearest telephone central office. He wants to implement the fastest remote connection service possible, but cost is a factor in the decision. Which WAN technology should Ralph implement?A dedicated leased line (fractional T-1)A standard modem-to-modem connectionA DSL (Digital Subscriber Line) connectionA broadband CATV connection
57 Which