NCTI TECH 4 TO 5 CH. TEST STUDY GUIDE (2022/2023) ALREADY PASSED

NCTI TECH 4 TO 5 CH. TEST STUDY GUIDE (2022/2023) ALREADY PASSED 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 ...

NCTI TECH 4 TO 5 CH. TEST STUDY GUIDE (2022/2023) ALREADY PASSED 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? ✔✔Back up 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 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"? ✔✔0000 1110 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) 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? ✔✔X.25* ATM* SMDS* 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 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, within the TCP/IP model layers, delivers packets to their destination across multiple networks, as does the Open Systems Interconnection (OSI) model Network Layer? ✔✔Internetwork Layer The header of an Internet Control Message Protocol (ICMP) message includes a Type field. The number in this field represents a message type as well as the format of a packet. What does the type field "14" represent? ✔✔Timestamp Reply* Which of the following are kept in a computer's Address Resolution Protocol (ARP) cache? ✔✔IP address and MAC address An Application Layer process needs to transmit data with as little overhead as possible. The application protocol provides error detection and recovery if the data is lost. What Transport Layer protocol should this process use? ✔✔User Datagram Protocol Which application is associated with the well-known port number 53? ✔✔Domain Name Server (DNS)** Which of the following is a Class C IP address? ✔✔192.168.40.15** ________ allows network administrators to break up a single network address into smaller network addresses, creating router-connected network segments, all with their own unique network address space. ✔✔Subnetting** Static routing and dynamic routing are two out of three different types of indirect routing. What is the third type? ✔✔Default routing _____ is a simple file transfer protocol used to transport data packets over UDP. ✔✔Trivial File Transfer Protocol (TFTP)* Which of the following are two types of domain names? ✔✔Relative name and fully qualified domain name (FQDN)** Which of the following does a CO DACS provide? ✔✔Provides a semi-permanent path for voice and data signals* What three basic functions does a telephone switch do when it processes calls? ✔✔Signaling, routing, and switching* According to the North American Numbering Plan (NANP), what does the "803" in 803-550- 0000 represent? ✔✔Number Plan Area Number Network Exchange What does the service code 411 represent? ✔✔Local Directory Assistance* Which of the following best describes the copper cabling that connects many homes and businesses to the nearest CO? ✔✔Local loops Which of the following is defined as a loss in signal amplitude, or strength, that occurs as a signal passes through a transmission medium and interconnecting devices? ✔✔Attenuation* What are Subscriber Line Carrier (SLC) circuits used for? ✔✔Increase the availability of tie lines*** The feature of a PBX system that creates a log of all incoming and outgoing calls is called? ✔✔Station Message Detail Recording (SMDR)* Curiosity, malice, and toll fraud are a few types of security problems that this service is vulnerable to? ✔✔Voice mail* What is the Signaling System 7 (SS7) protocol used for? ✔✔Telephone network control signaling* Which solution is more economical than using regular long distance service and enables companies to route telephone call over their data network? ✔✔Packet telephony PBX service*** Which Quality of Service (QoS) parameter is defined as a variable delay that is measured in a number of ways, such as a percentage of the maximum network delay (+/- 10 percent), or as a variation above or below the average network delay (+/- 10 ms of the average network delay over a period of time)? ✔✔Jitter* Admission control protocols, authentication mechanisms, and _______ are three ways communication networks provide admission control. ✔✔Access Control Lists (ACLs)* Which of the following specifications provides a standard definition of Ethernet VLANs? ✔✔802.1Q* Which ITU-T H.323 packet multimedia standards component is used for real-time bi-directional multimedia communications, and can either be a PC or a stand-alone device running an H.323 protocol stack and the desired multimedia applications? ✔✔Terminals* What is happening in step 8 of the SS7-VoIP Gateway Call Progress? ✔✔The destination SSP rings the destination subscriber telephone set* Which of the following SIP functions is defined as "SIP determines if an endpoint is available and willing to participate in a call"? ✔✔Determining endpoint availability* What method, in SIP terminology, is defined as a message that terminates a session by either endpoint? ✔✔BYE* Which of the following acronyms is defined as a forwarding behavior a node applies to a packet based on the packet's condition? The packet's Differentiated Services Code Points (DSCP) indicates the particular _____ a packet should receive as it passes from hop to hop. ✔✔PHB* What type of routing allows network administrators to specify additional information sources for the routing table and network model? ✔✔Policy-based* Which of the following is a Microsoft Windows utility that displays a computer's IP addressing and connectivity settings? ✔✔Ipconfig* Which MS-DOS command-line utility is the quickest and easiest way to evaluate whether a computer is up and running, and attached to a TCP/IP network? ✔✔Ping* After entering "arp" into the MS-DOS command line, which of the following switches would display the ARP cache? ✔✔-a or -g* What is the second step when troubleshooting a network? ✔✔Identify the affected area* Scenario: As you are connecting the office computers, you use one patch cord to connect each patch panel port to a hub port, and another patch cord to connect each work area port to a PC. You power up all the PCs and look at the hub port status indicators. All but one port shows green. What is the first troubleshooting step you should take? ✔✔Establish the symptoms* Scenario: You have finally identified the affected area and, as you proceed to the next step, you realize that since this is a new installation, there is no previous time that is known when everything worked. The installation itself is the only "change" and the third troubleshooting step. What step is next? ✔✔Select the most probable cause* What voice issue is a normal occurrence on the PSTN and other voice networks, and occurs as a result of network delay and the two- to four-wire conversion process? ✔✔Echo* Which protocol has a header of 5 bytes and a trailer of 3 bytes? ✔✔Point-to-Point Protocol What Protocol Independent Multicast (PIM) is designed to support large, densely populated multicast groups? ✔✔Dense Mode (DM)* Which device cannot solely break up LAN broadcast traffic? If large workgroups present broadcast containment issues, consider VLANs designed as separate routed subnets. ✔✔Switch*