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Why do only the outer electrons leave their orbit shells? Answer Only outer electrons leave their orbit shells because electrons farthest from the nucleus are more easily freed from their orbits due to a weaker electrostatic force. What is required to have a balanced (or stable) atom? Answer The number of electrons must equal the number of protons in order to have a balanced atom. List the capacity of each of the first four orbital shells of an atom. Answer Shell: #1 = 2 electrons; #2 = 8 ...

Which concept has enabled Software as a Service (SaaS), Platform as a Service (PaaS), and Networking as a Service (NaaS) offerings? Answer The separation of the transport and connectivity from the applications and services running atop the transport. 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 Packet Cable managed IP network? Answer Gateway Wha...

Lesson 2 Answer Lesson Two Local Area Network (LAN) Answer Which small network is private to the organization sharing a common communications line linking together devices such as computers, printers, and other peripherals? Media Access Control Address (MAC Answer Which of the following is a unique address that is physically assigned to devices such as a modem or network interface card (NIC) Data Link Layer and physical Layer Answer Which 2 layers of the open systems interconnection (OS...

Which of the following is most typical of a broadband network? Answer Multiple analog channels What components are common to all computer systems? (Check all that apply.) Answer Processor Memory Storage I/O What does I/O stand for? Answer Input / Output A NIC is a device used for: Answer Signaling A sound card is what general type of computer component? Answer Input/output Which of the following is managed by the OS? Answer Keyboard input Screen display File I/O Peripheral c...

What is one reason why broadband cable operators install fiber-optic cable in stages instead of changing the infrastructure all at once? Answer Changing the infrastructure all at once would cause too many service disruptions. What is the difference between the fiber-to-the-node (FTTN) and fiber-to-the-curb (FTTC) topologies? Answer An FTTC is allowed a smaller number of RF amplifiers between the optical fiber and the customer premises. Which type of star topology used in a passive optical ...

The open system interconnection reference model (OSI/R<) Network layer serves which primary function? Answer It uses layer 3 addresses to create multiple routed networks The address 68.56.189.17 belongs to which internet protocol IP class? Answer Class A What happens to a datagram sent by a higher level protocol to a 127.x.y.z address? Answer The datagram loops back inside the host and never leaves the network interface card (NIC) Which device evaluates and acts upon a packet's inte...

What is unique about WDM - PON ? Answer WDM-PON deployed in a greenfield system allows each subscriber to get their own designated wavelength. What is the main benefit of deploying WDM technology? Answer It will increase the capacity of the existing fiber networks tenfold without adding any more fiber. How are optical splitters used in the forward path? Answer As passive branching devices that divide an optical signal across multiple output fibers. What is the purpose of a fiber demarca...

Which piece of equipment in the VoIP phone system routes a call to the public switched telephone network (PTSN) when the receiving location is from outside the PacketCable managed IP network? Answer Gateway What are the three sub-network interfaces managed by PacketCable? Answer Hybrid fiber/coax (HFC), managed IP, and public switched telephone network (PSTN). Why is PacketCable VoIP a more efficient way of handling calls? Answer Most cable operators have built their own IP telephone netwo...

Current/ amperage Answer Flow or movement of electric charges Resistor Answer a passive two-terminal material that impedes the flow of current What is the most common workplace hazard involving electricity? Answer Electrical shocks What is minimum approach distance? Answer The shortest safe distance to keep from energized conductors CATV at the pole Answer 40'' CATV at the mid-span Answer 24'' CATV at the house Answer 12'' Live parts of electric equipment must be guard...

What is one reason why broadband cable operators install fiber-optic cable in stages instead of changing the infrastructure all at once? Answer Changing the infrastructure all at once would cause too many service disruptions. What is the difference between the fiber-to-the-node (FTTN) and fiber-to-the-curb (FTTC) topologies? Answer An FTTC is allowed a smaller number of RF amplifiers between the optical fiber and the customer premises. Which of these components is used in a passive optical...