NCTI 4 to 5 Exam Questions And Answers Verified 100% Correct

NCTI 4 to 5 Exam Questions And Answers Verified 100% Correct What is the main difference between a standard switch and a bridge? - ANSWER Switches effectively multiply the network's bandwidth Bridges and Layer 2 switches filter traffic in which way? - ANSWER 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? - ANSWER 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? - ANSWER 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. - ANSWER 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? - ANSWER 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? - ANSWER Timestamp Reply Which of the following are kept in a computer's Address Resolution Protocol (ARP) cache? - ANSWER IP address and MAC address l 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? - ANSWER User Datagram Protoco Which application is associated with the well-known port number 53? - ANSWER Domain Name Server (DNS) Which of the following is a Class C IP address? - ANSWER 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. - ANSWER Subnetting Static routing and dynamic routing are two out of three different types of indirect routing. What is the third type? - ANSWER Default routing _____ is a simple file transfer protocol used to transport data packets over UDP. - ANSWER Trivial File Transfer Protocol (TFTP) Which of the following are two types of domain names? - ANSWER Relative name and fully qualified domain name (FQDN) Which of the following does a CO DACS provide? - ANSWER Provides a semi- permanent path for voice and data signals What three basic functions does a telephone switch do when it processes calls? - ANSWER Signaling, routing, and switching According to the North American Numbering Plan (NANP), what does the "803" in 803- 550-0000 represent? - ANSWER Number Plan Area What does the service code 411 represent? - ANSWER Local Directory Assistance Which of the following best describes the copper cabling that connects many homes and businesses to the nearest CO? - ANSWER 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? - ANSWER Attenuation What are Subscriber Line Carrier (SLC) circuits used for? - ANSWER Reduce the number of physical wire pairs The feature of a PBX system that creates a log of all incoming and outgoing calls is called? - ANSWER Station Message Detail Recording (SMDR) Curiosity, malice, and toll fraud are a few types of security problems that this service is vulnerable to? - ANSWER Voice mail What is the Signaling System 7 (SS7) protocol used for? - ANSWER 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? - ANSWER Packet telephony 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)? - ANSWER Jitter Admission control protocols, authentication mechanisms, and _______ are three ways communication networks provide admission control. - ANSWER Access Control Lists (ACLs) Which of the following specifications provides a standard definition of Ethernet VLANs? - ANSWER 802.1Q Which ITU-T H.323 packet multimedia standards component is used for real-time bidirectional multimedia communications, and can either be a PC or a stand-alone device running an H.323 protocol stack and the desired multimedia applications? - ANSWER Terminals What is happening in step 8 of the SS7-VoIP Gateway Call Progress? - ANSWER 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"? - ANSWER Determining endpoint availability What method, in SIP terminology, is defined as a message that terminates a session by either endpoint? - ANSWER 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. - ANSWER PHB What type of routing allows network administrators to specify additional information sources for the routing table and network model? - ANSWER Policy-based