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Progression: Field Tech V - VI
Conventional Revised Questions and
Answers / Sure A +
Which small, network is private to the organization, sharing a common communications line linking together devices such as computers, printers, and other peripherals? - ✔✔Local area network (LAN). Which of the following is a unique address that is physically assigned to devices such as a modem or network interface card (NIC)? - ✔✔Media access control (MAC) address. Which two layers of the Open Systems Interconnection (OSI) reference model are combined in the transmission control protocol/Internet protocol (TCP/IP) model Network Access Layer? - ✔✔Data Link Layer and Physical Layer. Which protocol has four numeric fields, each 8 binary bits long, called "octets"? - ✔✔Internet protocol version 4 (IPv4). Which of the following data services does a business use because it works best for dedicated services, such as hosting a website or Internet server, email, and file transfer protocol (FTP)? - ✔✔Static Internet protocol (IP) addressing. Which type of unshielded twisted-pair (UTP) cable does not easily catch fire and is designed to smoke very little so that toxic fumes are not circulated through a building? - ✔✔CMP - Plenum-rated cable. Static Internet protocol (IP) address settings are manually configured using the IP address, the Preferred
DNS server, the Alternate DNS server, and the Subnet mask settings. Which setting is missing from the list? - ✔✔Default gateway. What determines the overall quality of a stable Internet service? - ✔✔Zero percent packet loss and a stable ping time. Which command line entry is used for testing latency, packet loss, and the general health of the modem? - ✔✔Ping Which step in the six-step troubleshooting process uses the information that was gathered to identify the cause of the problem and find the most likely solution? - ✔✔Diagnose the symptoms. When troubleshooting a missing channel issue on a media distribution gateway for a commercial property, what should be done? - ✔✔Verify that an auto program has been run or that the correct commercial TV configuration file in use. If an issue is found with a single set-back box (SBB) or digital terminal adapter (DTA) during the verification process, what is the first thing you should determine? - ✔✔Whether the issue is physical in nature such as no power, an unplugged High-Definition Multimedia Interface (HDMI), or on a switched outlet. What is the best way to gather information to create a clear and concise problem statement? - ✔✔Leverage multiple sources for information by talking to the customer's office staff, maintenance staff, and those impacted by the problem When troubleshooting a problem within a commercial property, what group of people should you leverage for help? - ✔✔Customer on-site Information Technology (IT) staff. When setting up a commercial TV, which feature allows you to change the access code to enter the installer menu? - ✔✔Installer sequence.
What should you always do when working with old telephone wiring? - ✔✔Inspect, clean, test, and label every part of the active telephone infrastructure within the business. What is typically required when working on a voice installation with a private branch exchange (PBX) system? - ✔✔A telephone technician or onsite support that is provided by the customer. What is the first thing to look for when telephones within the business experience an issue where there is no dial tone and the embedded multimedia terminal adapter (EMTA) is powered up? - ✔✔Check dial tone directly from the EMTA using a telephone test set. What does electrical interference from electrical wiring or electric motors cause on telephone wiring? - ✔✔Noise on the line. What telephone wiring condition is characterized by one or more telephones not working because one or both conductors have been cut? - ✔✔Open condition. Why is it important that a channel plan ensures no two adjacent access points are on the same channel? - ✔✔To avoid co-channel interference What special band, in the 5 GHz band, is located on Channel 165? - ✔✔Industrial, Scientific, and Medical (ISM) band Which two bands, in the 5GHz band, are home to the dynamic frequency selection (DFS) channels? - ✔✔Unlicensed National Information Infrastructure (UNII)-2 and UNII-2e bands Which Wi-Fi transmitting device has the highest likelihood to support dynamic frequency selection (DFS) channels? - ✔✔Enterprise-grade access points (AP) How many non-overlapping, dynamic frequency selection (DFS) supporting, 20 MHz wide channels reside in the 5 GHz band? - ✔✔ 24 What can be done when access points (AP) share the same channel and are contending for airtime, thus slowing down the network? - ✔✔Turn down transmit power
What consideration could one make if a deployed network has good 2.4 GHz coverage with lackluster 5 GHz coverage? - ✔✔Reduce transmit power in 2.4 GHz What is a result of 5 GHz wavelengths being shorter than 2.4 GHz wavelengths? - ✔✔5 GHz waves have a lower indoor range then 2.4 GHz waves. What credential server do Wired Protected Access (WPA) or WPA2 encrypted access points (AP) use to compare credentials prior to allowing a user to authenticate to a network? - ✔✔Remote Authentication Dial-In Service (RADIUS) server What is a good practice to use when installing an access point (AP) in a hospital room or dormitory where people sleep? - ✔✔Disable the light-emitting diodes (LED) on the AP and only temporarily enable them when troubleshooting If the Internet protocol (IP) address 192.168.100.0 names the network, what kind of address is 192.168.100.255 for that same network? - ✔✔Broadcast. Paula is dividing her home network into two smaller networks. Given the fact she is using the 192.168.100.0 network, which of the f ollowing subnet masks will supply the division she seeks? - ✔✔255.255.255. Bruce purchased a replacement router/firewall combination machine to replace the old one he inherited from the previous network administrator. The old router used decimal notation for masks. The new router uses Classless Inter-Domain Routing (CIDR) notation for masks. Which of the following decimal to CIDR notations are not valid? - ✔✔255.255.255.0 to / At work, Emily's laptop is assigned the Internet protocol (IP) address 192.10.10.10. When Emily takes the computer home, the laptop is assigned the IP address of 192.168.100.25. Whether at work or at home, what is the classful netmask assigned to her network interface card? - ✔✔255.255.255.
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? - ✔✔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? - ✔✔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? - ✔✔Constantly updated. Which of the following is an attribute of user datagram protocol (UDP) and not transmission control protocol (TCP)? - ✔✔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)? - ✔✔When data is lost, it is retransmitted automatically. In what way do ephemeral port numbers function? - ✔✔Temporary. Which network connection has a relatively high cost, is billed on a per port charge, and a rate per mile for the length of the circuit? - ✔✔Leased lines. Which communication technique uses microwave frequencies? - ✔✔Satellite. What is the oldest packet switching technology still in use worldwide? - ✔✔X. What device is required to attach a non-integrated services digital networks (ISDN) device to an ISDN network? - ✔✔Terminal adaptor (TA).
For any digital subscriber line (DSL) version, connection speed depends on the customer's distance from the providers - ✔✔Digital subscriber line access multiplexer (DSLAM). Which technology uses fixed-sized cells for transporting data? - ✔✔Asynchronous transfer mode (ATM). What is an international standard for a high-speed, connection-oriented, cell-switching technology? - ✔✔Asynchronous transfer mode (ATM). Asynchronous transfer mode (ATM) virtual circuits (VC) switch cells across networks by using which two header components? - ✔✔Virtual path identifier (VPI) and virtual channel identifier (VCI). In synchronous optical networks (SONET) and synchronous digital hierarchy (SDH), how much faster is the data rate of an electrical level STS-192 compared to an STS-1? - ✔✔192 times. For Carrier Ethernet, why is tagging packets insufficient for bandwidth management? - ✔✔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? - ✔✔Internet protocol (IP) address. The mapping of labels in a Multiprotocol label switching (MPLS) network domain are maintained by which of the following? - ✔✔Label Forwarding Information Base (LFIB). Ethernet over multiprotocol label switching (EoMPLS) is a tunneling service, which transports _________ Ethernet frames over an MPLS network. - ✔✔Layer 2. What is the mandatory label in the label stack of the header in time-division multiplexing over Internet protocol (TDMoIP)? - ✔✔Pseudowire. In a multiprotocol label switching (MPLS) network, which network component pushes
