Business Data Networks and Telecommunications.docx

Business Data Networks and Telecommunications Networking: How We Got Here 1) A network is a system that permits networked applications on different hosts to work together. A) True. B) False. Answer: A 2) Which of the following is a networked application? A) The Internet. B) The World Wide Web. C) Both A and B D) Neither A nor B Answer: B 3) Which of the following is a networked application? A) E-mail. B) The World Wide Web. C) Both A and B D) Neither A nor B Answer: C 4) Users create or enhance website content in ________ applications. A) Web-based B) WWW C) Web 2.0 D) streaming media Answer: C 5) Social media applications facilitate the creation of group relationships. A) True. B) False. Answer: A 6) A device attached to a network is called a ________. A) client B) server C) host D) Either A or B Answer: C 7) Which of the following is a host when it is on a network? A) A client PC. B) A server. C) A mobile phone. D) All of the above. Answer: D 8) If a laptop PC is connected to a network, it is a host. A) True. B) False. Answer: A 9) A smart phone connected to the Internet is a host. A) True. B) False. Answer: A 10) To emphasize the fact that the user does not have to see how it works internally, the ________ is often drawn as a cloud. A) network core B) access link C) host D) server Answer: A 11) In terminal-host processing, processing is done on both the terminal and the server. A) True. B) False. Answer: B 12) In client/server processing, processing is done on the ________. A) client B) server C) Both A and B D) Neither A nor B Answer: C 13) In P2P applications, most processing is done on the ________. A) client B) server C) Both A and B about equally. Answer: A 14) Client PCs provide service to other client PCs in ________ applications. A) P2P B) client/server C) Both A and B D) Neither A nor B Answer: A 15) In cloud computing, server management is outsourced. A) True. B) False. Answer: A 16) Network speeds usually are measured in ________. A) bits per second B) bytes per second C) Both A and B Answer: A 17) 320,000,000 bps is ________. A) 320 kbps B) 320 Mbps C) 320 Gbps D) None of the above. Answer: B 18) 47,000,000 bps is ________. A) 47 kbps B) 47 Tbps C) 47 Gbps D) 47 Mbps E) None of the above. Answer: D 19) 10 kbps is ________. A) 1,000 bps B) 10,000 bps C) 1,024 bps D) 10,240 bps E) None of the above. Answer: B 20) The correct metric prefix for kilo is K. A) True. B) False. Answer: B 21) Which of the following uses packet switching? A) Dial-up telephone circuits. B) Leased line circuits. C) Both A and B D) Neither A nor B Answer: D 22) Which type of circuit typically operates at faster speeds? A) Dial-up telephone circuits. B) Leased line circuits. C) Both A and B operate at about the same speed. Answer: B 23) With reserved capacity, data transmission speed for a conversation stays the same regardless of how many people are using the system. A) True. B) False. Answer: A 24) Circuits are reasonably efficient for ________. A) voice B) data C) Both A and B D) Neither A nor B Answer: A 25) ________ signals rise and fall smoothly. A) Analog B) Binary C) Both A and B D) Neither A nor B Answer: A 26) In ________ transmission, signals jump abruptly between two states. A) analog B) binary C) Both A and B D) Neither A nor B Answer: B 27) In binary signaling, there are ________ states. A) a few B) two C) Both A and B D) Neither A nor B Answer: B 28) Which of the following is true? A) All binary signaling is digital signaling. B) All digital signaling is binary signaling. C) Both A and B D) Neither A nor B Answer: A 29) All digital signaling is binary signaling. A) True. B) False. Answer: B 30) Which of the following has greater resistance to transmission errors? A) Binary signaling. B) Analog signaling. C) Both A and B have about the same resistance. Answer: A 31) A modem converts original ________ signals to ________ signals that can travel down the telephone system. A) digital, analog B) analog, digital C) binary, digital D) None of the above. Answer: A 32) If a modem sends two ones in a row, the receiver can distinguish between them thanks to ________. A) modulation B) the fact that the ones will have different amplitude levels C) the fact that the ones will have different frequencies D) None of the above. Answer: D 33) A typical packet is about ________ long. A) 100 bits B) 100 bytes C) 1,000 bytes D) 10,000 bytes E) 40 bits Answer: B 34) Fragmentation is done on the ________. A) source host B) destination host C) Both A and B D) Neither A nor B Answer: A 35) Reassembly is done on the ________. A) source host B) destination host C) Both A and B D) Neither A nor B Answer: B 36) Multiplexing reduces transmission cost. A) True. B) False. Answer: B 37) Packet switching is desirable because it ________. A) makes transmission more efficient B) reduces transmission time C) Both A and B D) Neither A nor B Answer: A 38) Packet switching is most efficient for ________ data. A) relatively constant B) bursty C) high-latency D) high-priority E) All of the above. Answer: B 39) When a switch receives a packet, the switch selects the ________. A) destination host B) port to send the packet out C) path through the switched network D) None of the above. Answer: B 40) A switch knows a packet's entire path through a switched network. A) True. B) False. Answer: B 41) A ________ is the path that a frame takes across a single switched network. A) physical link B) data link C) route D) transport E) connection Answer: B 42) If a packet passes through seven switches between the source and destination hosts, how many physical links would there be? A) One. B) Six. C) Seven. D) Eight. Answer: D 43) If a packet passes through eight switches between the source and destination hosts, how many data links would there be? A) One. B) Six. C) Seven. D) Eight. Answer: A 44) On the ARPANET, packet switches were called ________. A) routers B) gateways C) IMPs D) NCPs E) Both c. and d. Answer: C 45) On the ARPANET, ________ control each computer's communication with the network. A) IMPs B) NCPs C) routers D) gateways E) Both c. and d. Answer: B 46) The Network Working Group called its standards ________. A) IMPs B) RFCs C) NCPs D) None of the above. Answer: B 47) Ray Tomlinson extended e-mail from being a communication system among users of a single computer to being a communication system among users of many computers. A) True. B) False. Answer: A 48) Ray Tomlinson used the @ sign to separate the username from the password. A) True. B) False. Answer: B 49) In the early days of the Internet, although e-mail was actually very expensive, ARPA mistakenly believed that it was very cheap. A) True. B) False. Answer: B 50) What device connects different networks into an internet? A) Router. B) Switch. C) Network Access Point. D) IMP. E) Core switch. Answer: A 51) A router connects different networks into an internet. A) True. B) False. Answer: A 52) Routers used to be called ________. A) NCPs B) switches C) Network Access Points D) gateways Answer: D 53) Spelling internet with a lowercase i indicates that you are talking about the global internet. A) True. B) False. Answer: B 54) The creation of internetworking required the introduction of two addresses for each host. A) True. B) False. Answer: A 55) Hosts on the Internet have ________ address(es). A) 1. B) 2. C) 3. D) 4. E) 5. Answer: B 56) An IP address is ________ bits long. A) 48 B) 32 C) 8 D) 6 E) 4 Answer: B 57) For human reading, IP addresses usually are expressed in ________. A) hexadecimal notation B) dotted decimal notation C) Both A and B Answer: B 58) Packets are carried inside frames. A) True. B) False. Answer: A 59) A frame usually is carried inside a packet. A) True. B) False. Answer: B 60) If two hosts are separated by seven networks, how many packets will there be along the way when a host transmits a packet to another host? A) 1. B) 2. C) 7. D) 14. E) None of the above. Answer: A 61) If two hosts are separated by seven networks, how many frames will there be along the way when a host transmits a packet to another host? A) 1. B) 2. C) 7. D) 14. E) None of the above. Answer: C 62) In internets, different networks are connected by ________. A) switches B) routers C) Both A and B D) Neither A nor B Answer: B 63) A route is the path a frame takes across a single network, from the source host to the destination host, across multiple switches. A) True. B) False. Answer: B 64) A computer connects to the nearest switch via a ________. A) physical link B) data link C) Both A and B D) Neither A nor B Answer: A 65) A ________ is the path that a frame takes across a single switched network. A) physical link B) data link C) route D) connection Answer: B 66) Dividing a message into a series of smaller messages is called ________. A) fragmentation B) packetization C) serialization D) framing Answer: A 67) Which of the following layers specifically governs transmission across an internet? A) The internet layer. B) The transport layer. C) Both A and B Answer: C 68) Which of the following layers specifically governs transmission across an internet? A) The data link layer. B) The transport layer. C) Both A and B Answer: B 69) Which layer governs the hop-by-hop transmission of packets across an internet? A) The internet layer. B) The transport layer. C) Both A and B D) Neither A nor B Answer: A 70) What layer number is the transport layer? A) 1. B) 2. C) 3. D) 4. E) 5. Answer: D 71) What layer number is the physical layer? A) 1. B) 2. C) 3. D) 4. E) 5. Answer: A 72) ________ are carried inside ________. A) Frames, packets B) Packets, frames C) Both A and B D) Neither A nor B Answer: B 73) Frames are carried inside packets. A) True. B) False. Answer: B 74) Which standard deals with addresses and functionality for routers to move packets across an Internet? A) IP. B) TCP. C) UDP. D) None of the above. Answer: A 75) Which standard places packets that arrive out of order in order? A) IP. B) TCP. C) UDP. D) None of the above. Answer: B 76) The Internet Protocol is responsible for placing packets that arrive out of order in order. A) True. B) False. Answer: B 77) Which standard does fragmentation? A) IP. B) TCP. C) UDP. D) None of the above. Answer: B 78) Which standard corrects errors? A) IP. B) TCP. C) UDP. D) None of the above. Answer: B 79) You would use TCP at the transport layer if you did not need error correction or could not use error correction. A) True. B) False. Answer: B 80) If you did not need error correction or could not use error correction at the transport layer, you would choose ________. A) IP B) TCP C) UDP D) None of the above. Answer: C 81) Internet e-mail began to interconnect with e-mail on other networks during the ________. A) 1960s B) 1970s C) 1980s D) 1990s Answer: B 82) Commercial activity has always been considered acceptable on the Internet. A) True. B) False. Answer: B 83) The NSF Acceptable Use Policy permitted commercial activity on the Internet. A) True. B) False. Answer: B 84) The Internet is paid for by ________. A) user payments to ISPs B) the government C) advertising D) vendor corporations Answer: A 85) Carriers that provide internet service are called Internet service providers. A) True. B) False. Answer: A 86) Different ISPs interconnect at ________. A) routers B) switches C) network access points D) IMPs E) portals Answer: C 87) E-commerce collapsed after the dotcom failures of 2000 and 2001. A) True. B) False. Answer: B 88) A ________ IP address does not change. A) static B) dynamic C) Both A and B D) Neither A nor B Answer: A 89) Dynamic IP addresses do not change. A) True. B) False. Answer: B 90) Which protocol provides a client PC with its dynamic IP address? A) The Post Office Protocol (POP). B) The Transmission Control Protocol (TCP). C) The Dynamic Host Configuration Protocol (DHCP). D) The Internet Protocol (IP). Answer: C 91) The Dynamic Host Configuration Protocol provides ________. A) dynamic IP addresses B) several types of configuration information C) Both A and B D) Neither A nor B Answer: C 92) Manually configuring client PCs is efficient. A) True. B) False. Answer: B 93) In a DNS response message, you get the IP address of a host. Of which host is this the IP address? A) Your ISP's access server. B) Your own host (your PC). C) The DNS server. D) The router that serves your host. E) A host you are trying to reach. Answer: E 94) Which of the following gives you the IP address of a host you wish to communicate with? A) DHCP. B) DNS. C) Both A and B D) Neither A nor B Answer: B 95) A network that runs on the customer premises is a ________. A) LAN B) WAN C) Both A and B D) Neither A nor B Answer: A 96) A LAN is a network that ________. A) links different sites together B) provides international service C) provides service within a site D) All of the above. Answer: C 97) A WAN is a network that ________. A) links different sites together B) provides service within about a mile C) provides service within a site D) All of the above. Answer: A 98) A company has more control over its ________ technology. A) LANs B) WANs Answer: A 99) Companies use carriers for WAN transmission because ________. A) companies lack rights of way B) carriers have extremely strong security C) Both A and B D) Neither A nor B Answer: A 100) The general name for a company that is given rights of way to lay wires through public areas is carrier. A) True. B) False. Answer: A 101) Typical LAN speeds are faster than typical WAN speeds. A) True. B) False. Answer: A 102) LAN speeds are faster than WAN speeds. This is because of ________. A) technological limitations B) regulatory limitations C) the slow corporate adoption of newer WAN technologies D) economic limitations Answer: D 103) LANs are ________. A) single networks B) internets C) Either A or B D) Neither A nor B Answer: C 104) WANs are ________. A) single networks B) internets C) Either A or B D) Neither A nor B Answer: C 105) RJ-45 is the connector standard for wired connections. A) True. B) False. Answer: A 106) What is the standard for wireless PCs and printers to connect to a wireless access point? A) RJ-45. B) 802.11. C) IP. D) WWAN. Answer: B 107) Which of the following is not a function of a wireless access router? A) Router. B) Ethernet switch. C) DHCP server. D) Network address translation (NAT). E) All of the above are functions of a wireless access router. Answer: E 108) A home access router contains a DHCP server. A) True. B) False. Answer: A 109) Your ISP gives your home a single IP address. What in the access router allows you to have multiple devices share a single IP address? A) DHCP. B) DNS. C) NAT. D) Multiplexing. Answer: C