CompTIA Network+ Practice Tests. Craig ZackerЧитать онлайн книгу.
(STP) on a switch evaluates the paths through the network and places each port in the forwarding or blocking state?AssimilationConvergenceTree-buildingListening
26 A multilayer switch typically functions at which layers of the OSI reference model? (Choose two.)Data linkNetworkTransportApplication
27 Which of the following is something that only a firewall capable of stateful packet inspection can do?Filter traffic-based port numbersBlock traffic destined for specific IP addressesScan transport layer header fields for evidence of SYN floodsBlock all TCP traffic from entering a network
28 In local area networking, which of the following is not a type of bridge?Store and forwardRoutingTransparentMultiport
29 Which of the following are methods typically used by Intrusion Detection Systems (IDSs) to analyze incoming network traffic? (Choose all that apply.)Anomaly-based detectionBehavior-based detectionSignature-based detectionStatistic-based detection
30 Virtual Local Area Networks (VLANs) create the administrative boundaries on a switched network that are otherwise provided by which of the following devices?HubsRoutersFirewallsBridges
31 Which of the following devices can you use to connect two multimode fiber-optic Ethernet networks in different buildings 2000 meters apart using a single-mode fiber-optic cable segment running at the same speed, while maintaining a single collision domain?BridgeSwitchRouterMedia converter
32 Which of the following is another term for a multiport bridge?RouterSwitchHubGateway
33 Which of the following devices enables two computers to communicate when they are using different protocols at each layer of the Open Systems Interconnection (OSI) reference model?A routerA switchA hubA gateway
34 Review the following figure. How many collision domains and broadcast domains exist in the network diagram?There are three collision domains and three broadcast domains.There is one collision domain and three broadcast domains.There is one broadcast domain and three collision domains.There are no collision domains and only one broadcast domain.There are nine collision domains and three broadcast domains.
35 Which of the following statements about switches and routers are true? (Choose all that apply.)Routers operate at the network layer, whereas switches operate at the data link layer.All of the devices connected to a switch are part of a single broadcast domain, whereas the networks connected to a router form separate broadcast domains.Routers can communicate with each other and share information, but switches cannot.Switches forward packets based on their hardware addresses, whereas routers forward packets based on their IP addresses.
36 Ralph is installing an Ethernet Local Area Network (LAN) for a small business with two offices on opposite sides of a courtyard. Ralph plans to run a multimode fiber-optic cable across the courtyard, but the budget is limited, and he cannot use fiber for the whole network. Therefore, he installs Unshielded Twisted Pair (UTP) cable in the two offices, which have 10 and 12 workstations, respectively. Which of the following devices should Ralph use to join the two UTP installations together into one LAN using the fiber-optic run across the courtyard, while keeping the cost to a minimum?Media convertersHubsSwitchesRouters
37 Five computers are connected to the same switch, but only four are able to communicate with each other. Assuming that all of the hardware is functioning properly, which of the following could be a reason for the fifth computer's communication problem?The switch has the fifth computer connected to a Virtual Local Area Network (VLAN) that's different from that of the other four.The network is experiencing a switching loop.The fifth computer is experiencing an MTU black hole, whereas the other four computers are not.There is a virtual router between the fifth computer and the other four.
38 Which of the following types of systems are frequently used to collect information from Intrusion Detection Systems (IDSs)?SIEMNGFWRADIUSVoIP
39 Which of the following network devices are “dumb”—that is, purely electrical devices with no electronic intelligence?HubsSwitchesRoutersBridges
40 Which of the following explains why splitting a large, switched Ethernet LAN into two LANs by adding a router can help to alleviate traffic congestion and improve performance? (Choose all that apply.)Adding a router reduces the amount of broadcast traffic on each of the two LANs.Adding a router reduces the amount of unicast traffic on each of the two LANs.Adding a router diverts traffic to an alternate path through the network.Adding a router prevents computers on one LAN from communicating with computers on another LAN.
41 A small business office currently has a 100Base-TX Ethernet network with a single 8-port hub. All of the hub ports are populated, and the business owner wants to expand the network further. However, the hub does not have an uplink port. The owner has purchased a new hub, also with eight ports, which does have an uplink port, but he does not know how to connect them together. What must the owner do to install the new hub on the network?Use a standard patch cable to connect a standard port on the existing hub to a standard port on the new hub.Use a standard patch cable to connect a standard port on the existing hub to the uplink port on the new hub.Purchase a crossover cable and use it to connect a standard port on the existing hub to the uplink port on the new hub.Purchase a second new hub with an uplink port to replace the old one and use a standard patch cable to connect the two uplink ports together.
42 Which of the following tasks can you perform to split a large, switched Local Area Network (LAN) into multiple broadcast domains? (Choose all that apply.)Replace one or more switches with hubs.Install a firewall to filter broadcast traffic.Enable the Spanning Tree Protocol (STP) on the switches.Create Virtual Local Area Networks (VLANs) in the switches.Install routers on the network.
43 Which of the following statements about bridges and switches is true?Bridges and switches are network layer devices that use logical addressing to forward frames.Bridges and switches are data link layer devices that use Media Access Control (MAC) addresses to forward frames.Bridges and switches build their internal tables based on destination addresses and forward packets based on source addresses.Bridges and switches must support the network layer protocol implemented on the Local Area Network (LAN).Each port on a bridge or switch defines a separate broadcast domain.
44 Which of the following is a correct term describing the function of a switch?Layer 2 routerEthernet hubMultiport bridgeLayer 3 repeater
45 Which of the following are available as Internet of Things (IoT) devices?RefrigeratorsDoorbellsThermostatsSpeakersAll of the above
46 Which of the following is the primary reason why replacing hubs with switches on an Ethernet Local Area Network (LAN) improves its performance?Switches forward packets faster than hubs.Switches do not forward broadcast transmissions.Switches reduce the number of collisions on the network.Switches read the IP addresses of packets, not the hardware addresses.
47 Which of the following is a correct definition of a collision domain?A group of Local Area Networks (LANs), connected by routers, that enables any node to transmit to any other nodeA group of computers connected so that a broadcast transmission by any one device reaches all of the other devicesA group of devices connected by cable segments that are longer than the maximum length stated in the physical layer specificationA group of devices connected so that when two devices transmit at exactly the same time, a data collision occurs
48 Which of the following terms are used to describe the device used to place calls on a Voice over Internet Protocol (VoIP) installation? (Choose all that apply.)TerminalGatewayEndpointPBX
49 Which of the following statements about hubs is not true?Hubs are data link layer devices that connect network devices in a star or ring topology.Hubs amplify and repeat signals received through one port out all other ports regardless of the destination.Hubs are physical layer devices that connect network devices in a star topology.Hubs provide internal crossover circuits and use uplink ports to form a hierarchical star.
50 Which of the following statements about routers are true? (Choose all that apply.)Routers are network layer devices that use IP addresses to forward frames.Routers are data link layer devices that use Media Access Control (MAC) addresses to forward frames.Routers build their internal tables based on destination MAC addresses and forward frames based on source MAC addresses.Routers must support the network layer protocol implemented on the Local Area