Craig Zacker - CompTIA Network+ Practice Tests

138 Which of the following 10 Gigabit Ethernet specifications calls for the use of copper cable?10GBase-LR10GBase-CX410GBase-ER10GBase-LX410GBase-SR

139 Alice is a network consultant who has been contracted to upgrade an existing Ethernet network to Gigabit Ethernet. The network consists of 20 workstations with integrated 10Base-T/100Base-TX/1000Base-T network interface adapters. The network cabling is Category 5 (CAT5) Unshielded Twisted Pair (UTP), installed when the building was constructed. All of the workstations are connected to a single 100Base-TX switch. Which of the following options would Alice find to be a valid upgrade path to Gigabit Ethernet?Replace the CAT5 cable with at least Category 5e (CAT5e) or Category 6 (CAT6), and leave the existing network interface adapters and switch in place.Install a 1000Base-T network interface card in each computer, and leave the existing cables and switch in place.Replace the CAT5 cable with at least CAT5e or CAT6, and replace the 100Base-T switch with a 1000Base-T switch.Replace the 100Base-TX switch with a 1000Base-T switch, and leave the existing cables and network interface adapters in place.

140 Ralph is a network consultant with a client who wants him to design the Local Area Network (LAN) for his company's new branch office. The site consists of a building with Unshielded Twisted Pair (UTP) cable already installed, which the client considered a major selling point when selecting the property. He wants Ralph to install the fastest possible LAN using the existing cable. After examining the site, Ralph notes that the cable is Category 5 (CAT5), installed using a star topology, and that the individual cable runs are all less than 100 meters long. Which of the following Ethernet physical layer specifications can Ralph use for the new network to provide the fastest transmission speeds without replacing the cable?10GBase-T100Base-TX1000Base-T1000Base-LX1000Base-SX

141 Which Institute of Electrical and Electronics Engineers (IEEE) standards for Ethernet support 10-megabit-per-second (Mbps) communications, and what are the correct segment limitations for each standard? (Choose all that apply.)10Base2; segment maximum is 100 meters10Base2; segment maximum is 185 meters10Base5; segment maximum is 500 meters100Base5; segment maximum is 500 meters10Base-T; segment maximum is 100 meters10Base-T segment maximum is 328 meters

142 Which of the following are Ethernet cable types that must be configured in a bus topology? (Choose all that apply.)RG-8RG-10RG-14RG-58

143 Ed has been hired by a company to upgrade its network infrastructure. The current network is 10 Mbps Ethernet running on Category 5 (CAT5) twisted pair cable. There are 100 computers on the network, all of which have 10/100/1000 multispeed network interface adapters. The computers are all connected to hubs. Users are complaining that the network is too slow, and connections are sometimes dropped. Management wants to upgrade to the fastest Ethernet standard possible, using the existing cabling, and still keep costs to a minimum. Which of the following implementations should Ed recommend to the client?Upgrade to 100Base-TX and keep the existing hubs.Upgrade to 1000Base-T and keep the existing hubs.Upgrade to 100Base-FX and replace all of the hubs with switches.Upgrade to 1000Base-T and replace all of the hubs with switches.Upgrade to 100Base-SX and replace all of the hubs with switches.

144 Ralph has been asked to create some new patch cables that will be used to connect patch panel ports to the network switches. He has been told to use the T568B pinout standard for all of the cable connectors. Ralph gathers the materials and the tools needed to complete the task, but he is not sure about the T568B pinout. Which of the following pinouts must Ralph use when creating the patch cables?White/orange, orange, white/green, blue, white/blue, green, white/brown, brownWhite/green, green, white/orange, blue, white/blue, orange, white/brown, brownWhite/orange, orange, white/green, green, white/blue, blue, white/brown, brownWhite/brown, white/green, white/orange, blue, white/blue, orange, green, brown

145 It is Ralph's first day working for a consultancy that does network cable installations. His new boss hands him a spool of Category 6 cable, a large plier-like device, and a bag of little clear plastic components and tells him to “get started on fives and tens.” What is Ralph expected to do?Pull cable runsCreate patch cablesAttach keystone connectorsInstall a patch panel

146 Wavelength division multiplexing is a fiber-optic technique for carrying multiple signals on a single network medium. There are several types of this technique, including Coarse Wavelength Division Multiplexing (CWDM), Dense Wavelength Division Multiplexing (DWDM), and Bidirectional Wavelength Division Multiplexing (BWDM, or just WDM). Which of the following is not one of the ways in which these types of multiplexing differ?They use different wavelength spacings.They carry different numbers of channels on a single medium.They provide different amounts of signal amplification.None of the above.

147 Which of the following services enables computers on a private IPv4 network to access the Internet using a registered IP address?DHCPNATDNSNTP

148 Which of the following best defines the concept of the dual stack?A computer with two network interface adaptersA computer with two installed operating systemsA computer with two sets of networking protocolsA computer with connections to two different network segments

149 Network Address Translation (NAT) operates at which layer of the Open Systems Interconnection (OSI) model?Data linkNetworkTransportApplication

150 Which of the following is the most accurate description of the subnetting process on an IPv4 network?You extend the IP address by adding bits for a subnet identifier.You borrow bits from the network identifier to create a subnet identifier.You borrow bits from the host identifier to create a subnet identifier.You create a subnet identifier by borrowing half of the bits from the network identifier and half from the host identifier.

151 Which of the following IPv4 addresses are you unable to assign to a network host? (Choose all that apply.)1.1.1.1229.6.87.3103.256.77.49.34.0.1

152 How many bits are allocated to the host identifier in an IPv4 address on the 10.72.0.0/17 network?8151617

153 Which of the following are not valid IPv4 addresses in the private address space defined by RFC 1918? (Choose all that apply.)10.16.225.1172:33:19:7192.168.254.7710.255.255.255172.15.2.9

154 Alice has been instructed to create an IPv4 network with 8 subnets and 30 hosts per subnet. She has been assigned a Class C network address. Which of the following subnet masks will she have to use?255.255.255.128255.255.255.192255.255.255.224255.255.255.240255.255.255.248255.255.255.252

155 Which of the following is the default subnet mask for an IPv4 Class A network?255.0.0.0255.255.0.0255.255.255.0255.255.255.255

156 Which of the following is the range of IPv4 addresses that Automatic Private IP Addressing (APIPA) assigns to DHCP clients that cannot access a DHCP server?10.0.0.0 to 10.0.255.255169.254.0.0 to 169.254.255.255192.168.0.0 to 192.168.0.255224.0.0.0 to 224.0.255.255

157 In which IPv4 class is the address 127.0.0.1 found?Class AClass BClass CNone of the above

158 Which of the following is a valid IPv6 address?fe00::b491:cf79:p493:23ff2001:0:49e6:39ff:8cf5:6812:ef56fe00::c955:c944:acdd:3fcb2001:0:44ef68:23eb:99fe:72bec6:ea5f

159 To which class does the following IPv4 address belong: 190.126.14.251?Class AClass BClass CClass D

160 Classless Inter-Domain Routing (CIDR) is a standard for IPv4 addressing that includes the ability to create subnets using any number of IP address bits, rather than using 8-bit blocks. Which of the following terms describes this ability?VLSMAPIPAVLANEUI-64