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Which piece of equipment in a VoIP (voice over Internet protocol) phone system routes a call to the public switched telephone network (PSTN) when the receiving location is from outside the PacketCable managed IP network? - Correct answer Gateway What are the three sub-network interfaces managed by PacketCable? - Correct answer Hybrid fiber/coax (HFC), managed IP, and public switched telephone network (PSTN). Why is PacketCable VoIP (voice over Internet protocol) a more efficient way of handling calls? - Correct answer Most cable operators have built their own IP telephone networks that use Internet protocol rules. Which of the voice over Internet protocol (VoIP) service tiers bypasses the cable operator's direct link to the public switched telephone network (PSTN) and routes packets over the Internet to another telephone company? - Correct answer Tier II Secondary VoIP.
When a call is made from a phone that is on a managed IP phone system to a phone that is outside the managed IP phone system, how does the call get routed to the receiving phone? - Correct answer The gateway down-converts the digital data to an analog electrical signal format and routes the call to the public switched telephone network (PSTN). Because a cable operator will support as many lines as technically possible for a business customer, what does the installer have to do prior to connecting the embedded multimedia terminal adapter (EMTA)? - Correct answer Check the RF signal levels on the cable entering the building. When a PBX or key system is involved in a business installation, the installer can set up the embedded multimedia terminal adapters (EMTA) and cable, but what has to happen before the installer can begin connecting the equipment? - Correct answer The customer's PBX and key system technician must arrive at the location. For a business telephone installation, which of the following is the preferred location for the embedded multimedia terminal adapter (EMTA)? - Correct answer The main closet. Which of the following is a process that must be followed during a business order installation and differs from a residential order process? - Correct answer Making sure the PBX is tested and is functioning properly.
What organization is responsible for developing telecommunication standards that address commercial building cabling for telecom products and services? - Correct answer Telephone Industry Association / Electronic Industry Association (TIA/EIA) According to Telecommunications Industry Association/Electronic Industries Alliance (TIA/EIA) standards, which type of unshielded twisted-pair (UTP) cabling is recommended for data-grade applications? - Correct answer Category 5e Which configuration enables several telephone extensions to have a direct (home-run) connection to the same network circuit? - Correct answer A multiple-clip configuration If it is necessary to run cables from one intermediate distribution frame (IDF) to another, what type of connection block is used? - Correct answer M66- Grounding and protection are required in two places. One is in the equipment room or telecommunications closet. Where is the other? - Correct answer Building entrance When a circuit is cross-connected to a customer's equipment or telephones, it is tagged for identification. Where else are telephone numbers and line positions on the embedded multimedia terminal adapter (EMTA) noted? - Correct answer On the orange cover of the 66-block.
Why is the T568A wiring configuration recommended over the T568B wiring configuration? - Correct answer The T568A configuration is backward compatible with Universal Services Ordering Code (USOC) RJ-XX wiring. Which pins are often not installed in a RJ-11 jack? - Correct answer Pins 1 and 6. In a T568A wiring scheme for a four-pair connection, which pair uses white/brown for tip and brown/white for ring? - Correct answer Pair 4. When installing a 66-block, which mounting guidelines should be followed? - Correct answer A mount support bracket (also called a stand-off bracket) should be installed to help provide needed clearances. What is a main distribution frame? - Correct answer A wiring arrangement that connects outside and internal telephone lines. What is the maximum pulling tension for a four-pair unshielded twisted-pair (UTP) CAT-5e cable? - Correct answer 25 lbs. When running unshielded twisted-pair (UTP) cable, it is critical that - Correct answer The minimum bend radius be maintained to no less than 4 times the outside diameter. If a 66-block has a green cover, what does that designate? - Correct answer Network connections.
commercial buildings and can be used to verify inside wire (IW) in residential settings. Which of the following best describes how a wiremap tester checks pin-to-pin continuity? - Correct answer A wiremap includes one unit that injects a signal at one end of the cable and a second unit that checks the signal at the other end. What causes unshielded twisted-pair (UTP) cable to come in a variety of thicknesses? - Correct answer UTP jacket thickness varies because of flame rating and manufacturer. The terminator tool is used to: - Correct answer Give new service or take away service to a customer. Which tool is used to tighten "F" connectors securely? - Correct answer 7/16 inch wrench Which of the following features are normally part of a PBX system? - Correct answer Call forwarding, call waiting, speed dialing. Which key system architecture enables individual telephone sets that do not require any single shared- control unit? - Correct answer Independent keysets. Which type of telephone system allows a company to have a single phone number reach all employees even though they reside in different geographical locations? - Correct answer Hosted PBX.
Which telephone system is characterized by dual tone multi-frequency (DTMF) tones being transmitted to the central office? - Correct answer Traditional. Which phone system generates dial tone at the central office? - Correct answer Traditional. What is the maximum number of hunt groups that can be set up for a business IP voice account? - Correct answer Three. Which of the following is a feature of a PBX? - Correct answer Each phone is addressable. Which telephone system allows one extension to ring in multiple locations, either at the same time or in sequence? - Correct answer Hosted PBX. What is the most common digital standard for fixed telephony devices? - Correct answer Integrated services digital network (ISDN). When a business has automatic call distribution on its telephone system, what do callers hear? - Correct answer Callers are greeted with an automated message that notifies them that they will be on hold until someone is available. How are indoor EMTA units normally powered? - Correct answer With a 110 volt alternating current power source with battery backup Once power has been disconnected at the tap, which of the following represents the proper way to jumper
Before starting a final review with a customer at the end of an installation, what should an installer try to do? - Correct answer Talk to the same person that he or she spoke to at the beginning of the installation. Which of the following does an embedded multimedia terminal adapter (EMTA) local powering scheme provide? - Correct answer Telemetry data about the power operation of the EMTA. To prevent incompatibility between IP telephony and security systems, what should a cable company recommend that a customer do? - Correct answer Contact the alarm company prior to IP installation to ensure compatibility. There are three specific alarm monitoring concerns related to VoIP installation. Besides incompatibility issues with the in-line seizure module and the loss of electric power, what is the third concern? - Correct answer Improper wiring at the installation. What is a primary function of an RJ31X jack? - Correct answer It provides a method for quickly disconnecting an alarm system by unplugging its jumper. What will occur when the jumper is removed from an RJ31X jack? - Correct answer The alarm system will not function properly. What is the most common location for the RJ31X jack? - Correct answer In or close to the alarm control panel.
Why should the RJ31X jack be near a security company's alarm control panel? - Correct answer Because it is wired between the alarm panel, and the premises, thereby helping to reduce potential problems in the customer premises wiring. Which of the following accurately describes the proper wiring of an RJ31X jack? - Correct answer The tip and ring from the EMTA are terminated to the green and red terminals in the jack. Which of the following is true about a properly wired RJ31X jack? - Correct answer It allows the alarm panel to isolate itself from the premises wiring and disable the phone line when it needs to alert the monitoring location about an alarm activation. Which device seizes the telephone line and dials out to an alarm monitoring location when the security system senses an emergency? - Correct answer The DACT unit. When troubleshooting an alarm system, what does an RJ31X jack allow the technician to do? - Correct answer Isolate itself from the premises wiring and quickly disconnect an alarm system by unplugging its jumper. If the Internet protocol (IP) address 192.168.100. names the network, what kind of address is 192.168.100.255 for that same network? - Correct answer Broadcast.
Which of the following is a validly formed fully qualified domain name (FQDN)? - Correct answer jefferson.lib.co.us Tom discovers the Internet protocol (IP) address of his computer is 192.10.10.10. What address class does Tom's IP belong to? - Correct answer Class C. Frances connects her computer to the company's internal network, but she needs to access a public search engine. What Application Layer (Layer 7) protocol can allow her private Internet protocol (IP) address to connect to a public server? - Correct answer Network address translation (NAT). What is the primary purpose of the border gateway protocol (BGP)? - Correct answer To avoid routing loops between large networks. Intermediate system to intermediate system (IS-IS) builds adjacencies with all other routers. However, when connecting a local area network (LAN) to another LAN, which of the following is true? - Correct answer Usually, only one router may represent a LAN to the other network. Which network type does intermediate system to intermediate system (IS-IS) protocol support? - Correct answer Point-to-multipoint (P2MP) Internet group management protocol (IGMP) is carried by which protocol throughout a network? - Correct answer Internet protocol (IP).
Ray has logged into the corporate routers and configured open shortest path first (OSPF) on each. Which of the following addresses does OSPF use to multicast changes in the routing tables? - Correct answer 224.0.0. As part of multicast network management, what can notify Simple Network Management Protocol (SNMP) network management stations (NMS) of multicast problems and errors? - Correct answer Multicast traps. Routers in Internet Group Management Protocol (IGMP) use the Protocol Independent Multicast (PIM) protocol to build distribution trees. What happens once these trees are built? - Correct answer Constantly updated. Which of the following is an attribute of user datagram protocol (UDP) and not transmission control protocol (TCP)? - Correct answer It is an unreliable best-effort delivery. Which of the following is an attribute of transmission control protocol (TCP) and not user datagram protocol (UDP)? - Correct answer When data is lost, it is retransmitted automatically. In what way do ephemeral port numbers function? - Correct answer Temporary. Which network connection has a relatively high cost, is billed on a per port charge, and a rate per mile for
faster is the data rate of an electrical level STS- compared to an STS-1? - Correct answer 192 times. For Carrier Ethernet, why is tagging packets insufficient for bandwidth management? - Correct answer Common carriers receive and process trillions of packets from millions of customers. Multiprotocol label switching (MPLS)-compatible network routers utilize label tags instead of which other element of a data packet? - Correct answer Internet protocol (IP) address. The mapping of labels in a Multiprotocol label switching (MPLS) network domain are maintained by which of the following? - Correct answer Label Forwarding Information Base (LFIB). Ethernet over multiprotocol label switching (EoMPLS) is a tunneling service, which transports _________ Ethernet frames over an MPLS network. - Correct answer Layer 2. What is the mandatory label in the label stack of the header in time-division multiplexing over Internet protocol (TDMoIP)? - Correct answer Pseudowire. In a multiprotocol label switching (MPLS) network, which network component pushes an MPLS label onto the front of an incoming Internet protocol (IP) packet? - Correct answer Label edge router (LER). Asynchronous transfer mode (ATM) can be transported over multiprotocol label switching (MPLS)
networks and the reverse is also true. Looking at their individual attributes, where ATM must segment and encapsulate data packets into cells and then decapsulate and reassemble, MPLS needs to only do this. - Correct answer Add an additional header. Which concept has enabled Software as a Service (SaaS), Platform as a Service (PaaS), and Networking as a Service (NaaS) offerings? - Correct answer The separation of the transport and connectivity from the applications and services running atop the transport. Which protocol allows for the separation of Internet protocol (IP) addresses from the location function of the IP address when communicating on a virtual private network (VPN) with a mobile device? - Correct answer Host Identity Protocol (HIP). According to Telecommunication Standardization Sector (ITU-T), what is a next-generation network (NGN)? - Correct answer A packet-based network. Multiprotocol label switching (MPLS) has a fast- reroute feature in the event of a loss of connectivity. How fast can MPLS recover a connection? - Correct answer 50 ms (milliseconds) or less.
