CompTIA Network+ Practice Exam 1 (72 Questions)
72 Question CompTIA Network+ Practice Test.
Questions and Answers
- 1.
Which of the following devices operates at the network layer of the OSI model?
- A.
Access Point
- B.
Switch
- C.
Hub
- D.
Router
Correct Answer
D. RouterExplanation
Of the devices listed, only a router operates at the network layer of the OSI model. Answers A and B are incorrect because an AP and a switch are both considered data link layer devices. Answer C is incorrect because a hub is considered a physical layer device.Rate this question:
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- 2.
A client on your network has had no problems accessing the wireless network in the past, but recently she moved to a new office. Since the move, she has had only intermittent network access. Which of the following is most likely the cause of the problem?
- A.
The SSID on the client is misconfigured
- B.
The client system has moved too far from the access point
- C.
The WEP settings are incorrect
- D.
The access point is using an omnidirectional antenna
Correct Answer
B. The client system has moved too far from the access pointExplanation
A wireless AP has a limited range in which it can send and receive data signals. When a client system moves out of this range, client network access will either fail or be inconsistent. Answers A and C are incorrect because a misconfigured SSID or incompatible WEP settings would prevent communication between the wireless AP and client. Answer D is incorrect because an omnidirectional antenna is the type of antenna that would be used in this setting.Rate this question:
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- 3.
You are a network administrator managing a midsized network that uses a NetWare print server, a Windows application server, and a Linux firewall server. One of your servers loses network connectivity. You type ifconfig at the command line to determine whether the server has a valid IP address. Which server has lost connectivity?
- A.
The firewall server
- B.
The print server
- C.
The application server
- D.
Ifconfig is not a valid command on any of these platforms
Correct Answer
A. The firewall serverExplanation
The ifconfig command is used on a Linux system to determine the system’s IP configuration. Answer B is incorrect because with NetWare, you use the config command to obtain information about network addresses. Answer C is incorrect because on a Windows system, the ipconfig command is used to view the networking configuration, including the IP address. Answer D is incorrect because the ifconfig command can be used on UNIX/Linux platforms to view the networking configuration.Rate this question:
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- 4.
You are managing a network that uses both a UNIX server and a Windows 2000 server. Which of the following protocols can you use to transfer files between the two servers?
- A.
Telnet
- B.
PPP
- C.
FTP
- D.
PPTP
Correct Answer
C. FTPExplanation
FTP can be used to transfer files between Windows and UNIX systems. FTP is part of the TCP/IP protocol suite and is platform-independent. The Telnet utility is used to open a virtual terminal session on a remote host (answer A). PPP (answer B) is used to establish communications over a serial link. PPTP (answer D) is used to establish a secure link over a public network such as the Internet.Rate this question:
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- 5.
A user complains that access to a web page is very slow. What utility can you use to find the bottleneck?
- A.
Ping
- B.
Telnet
- C.
Tracert
- D.
Nbtstat
Correct Answer
C. TracertExplanation
tracert is a Windows command that can be used to display the full path between two systems, including the number of hops between the systems. The ping utility (answer A) can be used to test connectivity between two devices, but it only reports the time taken for the round-trip; it does not give information about how long it takes to complete each hop in the route. The Telnet utility (answer B) is used to open a virtual terminal session on a remote host. The nbtstat command (answer D) is used to view statistical information about a system’s NetBIOS status.Rate this question:
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- 6.
During a busy administrative week, you install a new virus suite in your network of 55 computers, a new RAID array in one of the servers, and a new office suite on 25 of the computer systems. After all the updates, you are experiencing system errors through-out the entire network. What should you do to help isolate the problem?
- A.
Disable the RAID array
- B.
Uninstall the office suite
- C.
Check the virus suite vendor's website for system patches or service packs
- D.
Reinstall the virus software
Correct Answer
C. Check the virus suite vendor's website for system patches or service packsExplanation
Because the system errors are over the entire network, it is likely that the cause of the problem lies with the virus suite, because it is installed on all computers. To troubleshoot such a problem, it would be a good idea to check for patches or updates on the vendor’s website. A problem with a RAID array (answer A) would affect only the server on which it is installed, not the entire network. Because the office suite (answer B) was installed on only some of the systems, it can be eliminated as a problem, because all the systems are affected. The virus software (answer D) appears to be the cause of the problem, but reinstalling it is unlikely to help.Rate this question:
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- 7.
What utility would you use to check the IP configuration on a Windows Vista system?
- A.
Netstat
- B.
Winipcfg
- C.
Ping
- D.
Ipconfig
Correct Answer
D. IpconfigExplanation
The ipconfig utility can be used to view the TCP/IP configuration on a Windows 2000, Windows XP, Windows Vista, or Windows Server 2003 system. None of these operating systems support the graphical winipcfg utility (answer B). The netstat utility (answer A) is used to view protocol statistics information. The ping utility (answer C) is used to test the connectivity between two systems on a TCP/IP network.Rate this question:
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- 8.
Which of the following services or protocols use SSH technology to provide additional security to communications? (Choose two)
- A.
SCP
- B.
SFTP
- C.
SNMP
- D.
SMTP
Correct Answer(s)
A. SCP
B. SFTPExplanation
Secure Shell (SSH) technology is used by both Secure Copy Protocol (SCP) and Secure File Transfer Protocol (SFTP). Answer C and D are incorrect because Simple Network Management Protocol (SNMP) and Simple Mail Transfer Protocol (SMTP) do not use SSH technology for additional security.Rate this question:
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- 9.
Which of the following backup methods clear the archive bit? (Choose the two best answers)
- A.
Differential
- B.
Sequential
- C.
Full
- D.
Incremental
Correct Answer(s)
C. Full
D. IncrementalExplanation
Both the full and incremental backup methods clear the archive bit to indicate which data does and does not need to be backed up. In a differential backup (answer A), the archive bit is not cleared. Sequential (answer B) is not a type of backup.Rate this question:
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- 10.
You are troubleshooting a server connectivity problem on your network. A Windows Vista system is having trouble connecting to a Windows Server. Which of the following commands would you use to display per-protocol statistics on the workstation system?
- A.
Arp -a
- B.
Arp -A
- C.
Nbtstat -s
- D.
Nbtstat -S
- E.
Netstat -s
Correct Answer
E. Netstat -sExplanation
The netstat -s command can be used to display per-protocol statistics. The arp command (answers A and B) is used to view a list of the IP address-to-MAC address resolutions performed by the system. The nbtstat utility (answers C and D) is used to view protocol statistics for the NetBIOS protocol.Rate this question:
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- 11.
You are working as a network administrator on a UNIX system. The system uses dynamic name resolution. What is used to dynamically resolve a hostname on a UNIX server?
- A.
TCP
- B.
ARP
- C.
DNS
- D.
UDP
Correct Answer
C. DNSExplanation
DNS is a platform-independent protocol used to resolve hostnames to IP addresses. TCP (answer A) is a network-layer connection-oriented protocol. ARP (answer B) resolves IP addresses to MAC addresses. The UDP protocol (answer D) is a connectionless protocol and is part of the TCP/IP protocol suite.Rate this question:
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- 12.
During the night, one of your servers powers down. Upon reboot, print services do not load. Which of the following would be the first step in the troubleshooting process?
- A.
Examine the server log files
- B.
Reboot the server
- C.
Reinstall the printer
- D.
Reinstall the printer software
Correct Answer
A. Examine the server log filesExplanation
In this scenario, your first step is to gather information by examining the server log files. When you have that information, you can proceed with the rest of the troubleshooting process. Rebooting the server (answer B) is unlikely to cure the problem. Before you reinstall the printer (answer C) or printer software (answer D), you should examine the log files to see if they report any problems.Rate this question:
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- 13.
Which of the following standards uses UTP cable?
- A.
100Base-TX
- B.
10Base-FL
- C.
100Base-UX
- D.
10Base2
Correct Answer
A. 100Base-TXExplanation
The 100Base-TX standard specifies twisted-pair UTP cable. Answer B is incorrect because 10Base-FL is a fiber standard and uses fiber-optic cable. There is no standard called 100Base-UX (answer C). 10Base2 (answer D) is an Ethernet networking standard that specifies thin coaxial cable.Rate this question:
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- 14.
Which of the following utilities can be used to view the current protocol connections on a Windows system?
- A.
Ping
- B.
Netstat
- C.
Telnet
- D.
Tracert
Correct Answer
B. NetstatExplanation
The netstat -a command can be used to display the current connections and listening ports. The ping utility (answer A) is used to test connectivity between two devices on a TCP/IP network. Telnet (answer C) is an application-level protocol that allows a virtual terminal session on a remote host. The tracert utility (answer D) allows a path to be traced between two hosts.Rate this question:
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- 15.
Which of the following statements about the 10Mbps IEEE 802.3 network standards is incorrect?
- A.
There are 10Mbps networking standards for both UTP and fiber-optic cable
- B.
The 802.3 10Mbps network standards use a logical bus topology
- C.
Irrespective of the type of cable, the maximum length of a 10Mbps network segment is 185 meters
- D.
10Mbps networking standards use a CSMA/CD media access method
Correct Answer
C. Irrespective of the type of cable, the maximum length of a 10Mbps network segment is 185 metersExplanation
The various 10Mbps 802.3 networking standards have different maximum cable lengths. With 10Base-FL, a segment can be up to 2,000 meters. Using thin coaxial cabling, the 10Base2 standard specifies a maximum segment length of 185 meters. 10Mbps implementations of Ethernet on UTP are limited to 100 meters. All Ethernet standards use a Collision Sense Multiple Access/Collision Detection media access method. The 10Mbps 802.3 standards use a logical bus topology, although they can use physical star or physical bus topology.Rate this question:
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- 16.
Which of the following is a connectionless protocol?
- A.
TCP
- B.
THC
- C.
IP
- D.
UDP
Correct Answer
D. UDPExplanation
UDP is a connectionless protocol. TCP (answer A) is a connection-oriented protocol. IP (answer C) is also a connection-oriented protocol. THC (answer B) is not a valid protocol.Rate this question:
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- 17.
Which of the following networking standards specifies a maximum segment length of 100 meters?
- A.
10Base2
- B.
10Base-FL
- C.
10Base-YX
- D.
10Base-T
Correct Answer
D. 10Base-TExplanation
10Base-T has a maximum segment length of 100 meters. The maximum length of a 10Base2 segment (answer A) is 185 meters. The maximum length of a 10Base-FL segment (answer B) is 2,000 meters. Answer C is not a valid networking standard.Rate this question:
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- 18.
Which copper-based medium offers speeds of up to 10Gbps and has a minimum of 250MHz of bandwidth?
- A.
Category 6b
- B.
Single-mode fiber
- C.
Multimode fiber
- D.
Category 6
Correct Answer
D. Category 6Explanation
Category 6 high-performance UTP cable can transmit data up to 10Gbps. Category 6 has a minimum of 250MHz of bandwidth and specifies cable lengths of up to 100 meters, with 10/100/1000Mbps transfer, along with 10Gbps over shorter distances. Answers B and C are incorrect because they are not copper-based media, but fiber. Answer A is not a valid standard.Rate this question:
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- 19.
You are experiencing a problem with a workstation, and you want to ping the local loopback. Which of the following are ways to check your local TCP/IP configuration? (Choose the two best answers)
- A.
Ping host
- B.
Ping localhost
- C.
Ping 127.0.0.1
- D.
Ping 127.0.0.0
Correct Answer(s)
B. Ping localhost
C. Ping 127.0.0.1Explanation
To verify the local IP configuration, you can either ping the localhost or use the IP address 127.0.0.1. The default hostname for a system is localhost, not host, which means that answer A is incorrect. Answer D is incorrect because this is the network address for the Class A loopback address, not a valid node loopback address.Rate this question:
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- 20.
Which of the following network devices operates at the physical layer of the OSI model?
- A.
Router
- B.
Hub
- C.
Bridge
- D.
NIC
Correct Answer
B. HubExplanation
A network hub operates at the physical layer of the OSI model. A router operates at the network layer of the OSI model. A bridge operates at the data link layer of the OSI model. A NIC operates at the data link layer of the OSI model.Rate this question:
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- 21.
You have been asked to implement a RAID solution on one of your company's servers. You have two hard disks and two hard disk controllers. Which of the following RAID levels could you implement? (Choose the three best answers)
- A.
RAID 0
- B.
RAID 1
- C.
Disk duplexing
- D.
RAID 10
- E.
RAID 5
Correct Answer(s)
A. RAID 0
B. RAID 1
C. Disk duplexingExplanation
With two hard disks and two controllers, you can implement RAID 0, RAID 1, and disk duplexing. RAID 5 (disk striping with parity; answer E) requires a minimum of three disks to be implemented. RAID 10 (answer D) is a combination of RAID 1 (disk mirroring) and RAID 0 (disk striping). RAID 10 requires a minimum of four disks.Rate this question:
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- 22.
Which of the following is a Class B IP address?
- A.
191.23.21.54
- B.
125.123.123.2
- C.
24.67.118.67
- D.
255.255.255.0
Correct Answer
A. 191.23.21.54Explanation
The first octet of a Class B address must be in the range 128 to 191. Answers B and C represent Class A addresses, which run from 1 to 126. Answer D is not a valid IP address; it is the subnet mask for a Class C network.Rate this question:
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- 23.
What utility produces the output shown below?
- A.
Netstat
- B.
Nbtstat
- C.
Ping
- D.
Tracert - R
Correct Answer
A. NetstatExplanation
The netstat utility can be used to display protocol statistics and TCP/IP network connections. The nbtstat utility (answer B) shows statistical information about the NetBIOS over TCP/IP connections. The ping utility (answer C) is used to test the connectivity between two devices on a TCP/IP network. The tracert utility (answer D) traces the path between two hosts on a TCP/IP network.Rate this question:
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- 24.
You have been called in to troubleshoot a problem with a newly installed e-mail application. Internal users can communicate with each other via e-mail, but neither incoming nor outgoing Internet e-mail is working. You suspect a problem with the port-blocking configuration of the firewall system that protects the Internet connection. Which of the following ports would you allow to cure the problems with the email? (Choose the two best answers)
- A.
20
- B.
25
- C.
80
- D.
110
- E.
443
Correct Answer(s)
B. 25
D. 110Explanation
TCP/IP port 25 is used by SMTP. TCP/IP port 110 is used by POP3. Because SMTP is used to send mail and POP3 is used to retrieve mail, ports 25 and 110 would need to be allowed for incoming and outgoing Internet email. TCP/IP port 20 (answer A) is used by FTP. TCP/IP port 80 (answer C) is used by HTTP. TCP/IP port 443 (answer E) is used by HTTPS.Rate this question:
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- 25.
What is the default subnet mask for a Class B network?
- A.
255.255.255.224
- B.
255.255.255.0
- C.
127.0.0.1
- D.
255.255.0.0
Correct Answer
D. 255.255.0.0Explanation
The default subnet mask for a Class B network is 255.255.0.0. Answer A is incorrect because it is not the default subnet mask for a Class B network. Answer B is not the default subnet mask for a Class B network; it is the default subnet mask for a Class C network. Answer C is the local loopback address.Rate this question:
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- 26.
At which OSI layer does TCP operate?
- A.
Network
- B.
Transport
- C.
Session
- D.
Presentation
Correct Answer
B. TransportExplanation
TCP operates at the transport layer of the OSI model. TCP does not operate at the network, session, or presentation layers.Rate this question:
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- 27.
What is the basic purpose of a firewall system?
- A.
It provides a single point of access to the Internet
- B.
It caches commonly used web pages, thereby reducing the bandwidth demands on an Internet connection
- C.
It allows hostnames to be resolved to IP addresses
- D.
It protects one network from another by acting as an intermediary system
Correct Answer
D. It protects one network from another by acting as an intermediary systemExplanation
The purpose of a firewall system is to protect one network from another. One of the most common places to use a firewall is to protect a private network from a public one such as the Internet. Answer A is incorrect because although a firewall can provide a single point of access, that is not its primary purpose. Answer B more accurately describes the function of a proxy server. Answer C describes the function of a DNS server.Rate this question:
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- 28.
E-mail and FTP work at which layer of the OSI model?
- A.
Application
- B.
Session
- C.
Presentation
- D.
User
Correct Answer
A. ApplicationExplanation
Both email and FTP work at the application layer of the OSI model. Email and FTP are application-layer protocols, not session or presentation layer protocols. User (answer D) is not a layer of the OSI model.Rate this question:
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- 29.
What is the IPv6 equivalent of 127.0.0.1? (Choose two)
- A.
0:0:0:0:0:0:0:1
- B.
0:0:0:0:0:0:0:24
- C.
::1
- D.
::24
Correct Answer(s)
A. 0:0:0:0:0:0:0:1
C. ::1Explanation
The IPv4 address 127.0.0.1 is reserved as the loopback address. IPv6 has the same reservation. IPv6 address 0:0:0:0:0:0:0:1 is reserved as the loopback address. The address can also be shown using the :: notation with the 0s removed, resulting in ::1.Rate this question:
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- 30.
While reviewing the security logs for your server, you notice that a user on the Internet has attempted to access your internal mail server. Although it appears that the user's attempts were unsuccessful, you are very concerned about the possibility that your systems might be compromised. Which of the following solutions are you most likely to implement?
- A.
A more secure password policy
- B.
A firewall system at the connection point to the Internet
- C.
File-level encryption
- D.
Kerberos authentication
Correct Answer
B. A firewall system at the connection point to the InternetExplanation
To prevent unauthorized access to a private network from the Internet, you can use a firewall server to restrict outside access. Implementing a more secure password policy (answer A) is a good idea, but it is not the best choice. Implementing a file-level encryption system (answer C) is a good idea, but it is not the best choice. Kerberos (answer D) is an authentication system, not a method to prevent unauthorized access to the system.Rate this question:
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- 31.
Which of the following pieces of information is not likely to be supplied via DHCP?
- A.
IP address
- B.
NetBIOS computer name
- C.
Subnet mask
- D.
Default gateway
Correct Answer
B. NetBIOS computer nameExplanation
The NetBIOS computer name is not supplied to client systems by a DHCP server.Rate this question:
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- 32.
While troubleshooting a network connectivity problem, you notice that the network card in your system is operating at 10Mbps in half-duplex mode. At what speed is the network operating?
- A.
2.5 Mbps
- B.
5 Mbps
- C.
10 Mbps
- D.
11 Mbps
Correct Answer
C. 10 MbpsExplanation
Because the NIC is functioning at half-duplex 10Mbps, the transfer rate is 10Mbps.Rate this question:
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- 33.
Which of the following is a valid IPv6 address?
- A.
42DE:7E55:63F2:21AA:CBD4:D773
- B.
42CD:7E55:63F2:21GA:CBD4:D773:CC21:554F
- C.
42DE:7E55:63F2:21AA
- D.
42DE:7E55:63F2:21AA:CBD4:D773:CC21:554F
Correct Answer
D. 42DE:7E55:63F2:21AA:CBD4:D773:CC21:554FExplanation
IPv6 uses a 128-bit address, which is expressed as eight octet pairs in hexadecimal format, separated by colons. Because it is hexadecimal, only numbers and the letters A through F can be used.Rate this question:
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- 34.
While troubleshooting a network connectivity problem on a Windows Server system, you need to view a list of the IP addresses that have been resolved to MAC addresses. What command would you use to do this?
- A.
Arp -a
- B.
Nbtstat -a
- C.
Arp -d
- D.
Arp -s
Correct Answer
A. Arp -aExplanation
The arp -a command is used to display the IP addresses that have been resolved to MAC addresses. The nbtstat command (answer B) is used to view protocol statistics for NetBIOS connections. arp -d (answer C) is used to delete entries in the ARP cache. The arp -s command (answer D) allows you to add static entries to the ARP cache.Rate this question:
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- 35.
Which of the following statements best describes RAID 5?
- A.
A RAID 5 array consists of at least two drives. Pairity information is written across both drives to provide fault tolerance
- B.
A RAID 5 array consists of at least three drives and distributes parity information across all the drives in the array
- C.
A RAID 5 array consists of at least three drives and stores the parity information on a single drive
- D.
A RAID 5 array consists of at least four drives. The first and last drives in the array are used to store parity information
Correct Answer
B. A RAID 5 array consists of at least three drives and distributes parity information across all the drives in the arrayExplanation
A RAID 5 array consists of at least three hard disks, and it stripes parity information across all disks in the array. Answer A is incorrect because RAID 5 (disk striping with parity) requires at least three drives. Answer C is incorrect because the parity information is stored in a stripe across all three drives in the array, not on a single drive. RAID 5 requires only three drives, which makes answer D incorrect.Rate this question:
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- 36.
Which of the following IEEE specifications does CSMA/CD relate to?
- A.
802.11b
- B.
802.2
- C.
802.5
- D.
802.3
Correct Answer
D. 802.3Explanation
CSMA/CD relates to the IEEE specification 802.3. The 802.11b standard (answer A) describes wireless LAN networking. The 802.2 standard (answer B) defines the media access methods for various networking standards. The 802.5 standard (answer C) defines token ring networking.Rate this question:
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- 37.
While you are troubleshooting a sporadic network connectivity problem on a Windows Vista system, a fellow technician suggests that you run the ping -t command. What is the purpose of this command?
- A.
It shows the route taken by a packet to reach the destination host
- B.
It shows how long, in seconds, the packet takes to reach the destination
- C.
It allows the number of ping messages to be specified
- D.
It pings the remote host continually until it is stopped
Correct Answer
D. It pings the remote host continually until it is stoppedExplanation
The ping -t command is used to send continuous ping requests to a remote system. The ping request continues until it is stopped manually. The traceroute utility (answer A) shows the route taken by a packet to reach the destination host. The ping command (answer B) shows how long a packet takes to complete the round-trip from the host to the destination. Answer C is incorrect because the ping command with the -n switch allows the number of ping messages to be specified.Rate this question:
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- 38.
Which of the following IEEE wireless standards uses the 5 GHz RF range?
- A.
802.11g
- B.
Infrared
- C.
802.11a
- D.
802.11b
Correct Answer
C. 802.11aExplanation
The IEEE 802.11a wireless standard specifies 5GHz as the RF transmission range. Answers A and D are incorrect because the IEEE wireless standards 802.11b/g both use the 2.4GHz RF range. Answer B, infrared wireless transmissions, also use the 2.4GHz RF.Rate this question:
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- 39.
What type of physical topology is shown in this figure?
- A.
Star
- B.
Ring
- C.
Bus
- D.
Mesh
Correct Answer
A. StarExplanation
The figure shows a star topology.Rate this question:
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- 40.
A remote user reports that she is having a problem connecting to the corporate network over her DSL connection. She can connect to the Internet and browse web pages, but she can't connect to the corporate remote-access gateway. Which troubleshooting step would you perform first?
- A.
Check the corporate remote-access gateway to see if it is running and operating correctly
- B.
Have the user reboot her system
- C.
Have the user reconfigure the IP address on her system to one of the address ranges used on the internal corporate network, and then try again
- D.
Have the user power-cycle the DSL modem and try again
Correct Answer
A. Check the corporate remote-access gateway to see if it is running and operating correctlyExplanation
In this scenario, you would first check the remote-access gateway to see if it is running and operating correctly. Because the user can browse web pages, this is not a connectivity problem. Answer B is incorrect because, although rebooting the system might help, the system appears to be working correctly, so rebooting it is unlikely to cure the problem. The IP address configuration appears to be working, because the user can access web pages, so answer C is incorrect. The Internet connection appears to be working, so cycling the power on the DSL modem, as described in answer D, is unlikely to help.Rate this question:
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- 41.
You have installed a web-based database system on your PC so that you can enter troubleshooting information and retrieve it from any location on the network. Your system's IP address is 192.168.1.164. You are not overly concerned about security, but as a basic measure, you allocate the web server application a port number of 9191 rather than the default port of 80. Assuming that you are working from another system on the network, what would you type into the address bar of a web browser to access the database?
- A.
Http://192.168.1.164.9191
- B.
Http://192.168.1.164/9191
- C.
Http://192.168.1.164//9191
- D.
Http://192.168.1.164:9191
Correct Answer
D. Http://192.168.1.164:9191Explanation
To specify a TCP/IP port other than the default of 80, simply append the port number to the end of the address, using a colon (:) to separate the two.Rate this question:
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- 42.
Which of the following IEEE standards has the highest maximum transmission speeds?
- A.
802.3ae
- B.
802.3xr
- C.
802.3.z
- D.
802.3u
Correct Answer
A. 802.3aeExplanation
The IEEE 802.3ae standard defines 10Gbps networking standards such as 10Gbase-LR and 10Gbase-SR. Answer B is incorrect because there is no IEEE 802.3xr standard. Answer C, 802.3z, defines gigabit Ethernet standards such as 1000Base-LX and 1000Base-SX. 802.3u (answer D) defines fast Ethernet standards such as 100Base-TX and 100Base-FX.Rate this question:
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- 43.
Which of the following best describes the function of PoE??
- A.
Routes data to PPP ports
- B.
Provides power over twisted pair cable
- C.
Increases speeds of twisted pair cable
- D.
Trunks switch ports
Correct Answer
B. Provides power over twisted pair cableExplanation
The purpose of Power over Ethernet (PoE) is to allow electrical power to be transmitted over twisted pair Ethernet cable. The power is transferred, along with data, to provide power to remote devices. These devices may include remote switches, wireless access points, Voice Over IP (VoIP) equipment, and more.Rate this question:
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- 44.
Which of the following is the IPv6 equivalent to IPv4 automatic 169.254.0.0 APIPA addressing?
- A.
Link local
- B.
Site local
- C.
Global address
- D.
Unicast
Correct Answer
A. Link localExplanation
IPv6 link-local addresses are automatically configured on all interfaces in an IPv6-based network. This automatic configuration is equivalent to the 169.254.0.0 automatically assigned IPv4 addressing using APIPA. The prefix used for a link-local address is fe80::.Rate this question:
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- 45.
You are tasked with specifying a way to connect two buildings across a parking lot. The distance between the two buildings is 78 meters. An underground wiring duct exists between the two buildings, although there are concerns about using it because it also houses high-voltage electrical cables. The budget for the project is very tight, but your manager still wants you to specify the most suitable solution. Which of the following cable types would you recommend?
- A.
Fiber-optic
- B.
UTP
- C.
Thin coax
- D.
STP
Correct Answer
A. Fiber-opticExplanation
Fiber-optic cable provides the most resistance to EMI and therefore is often used in environments that have a risk of interference. Although it is inexpensive, UTP cable (answer B) and thin coax (answer C) have very low resistance to EMI; therefore, they should not be run near high-voltage electric cables. STP (answer D) has a good level of resistance to EMI, but it is still not as resistant as fiber-optic. Not factoring in the cost, fiber-optic is the most suitable solution.Rate this question:
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- 46.
Which of the address types sends data to all systems on a subnet or network instead of single hosts?
- A.
Multicast
- B.
Unicast
- C.
Broadcast
- D.
Anycast
Correct Answer
C. BroadcastExplanation
IPv4 broadcast addresses are IP address that can target all systems on a subnet or network instead of single hosts. In other words, a broadcast message goes to everyone on the network or to a specific network segment. Answer A, multicast, sends data to an entire identified group of network users. Answer B, unicast, sends data to a specific system. Answer D is incorrect because anycast is not a valid networking term.Rate this question:
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- 47.
A user informs you that she can’t access the Internet from her system. When you visit her, you run the ipconfig /all utility and see the following information. What is the most likely reason the user is having problems accessing the Internet?
- A.
The system is on a different subnet than the DNS servers
- B.
DHCP is not enabled
- C.
The subnet is incorrect
- D.
The default gateway setting is not configured
Correct Answer
D. The default gateway setting is not configuredExplanation
The most likely cause of the problem is that the default gateway is not configured. Answer A is incorrect because from the output it appears that the DNS servers are on the same subnet as this system. Answer B does not apply because addressing is configured statically, so there is no DHCP service. This is not a problem, however. Answer C is incorrect because the subnet mask is the correct default subnet mask for a Class C network.Rate this question:
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- 48.
Your ISP account manager suggests that it might be appropriate for you to install a DNS server internally. Which of the following functions does the DNS server perform?
- A.
It performs network address translation services
- B.
It streamlines the resolution of NetBIOS names to IP addresses
- C.
It allows some hostname-to-IP address resolutions to occur internally
- D.
It allows users to retrieve Internet web pages more quickly
Correct Answer
C. It allows some hostname-to-IP address resolutions to occur internallyExplanation
DNS allows hostname resolutions to occur internally. In most cases, companies use a DNS server provided by the ISP. In some cases, however, it might be appropriate to have a DNS server on the internal network. Answer A is incorrect because NAT is normally a function of firewall or proxy servers. Answer B describes the purpose of a WINS server. Answer D describes the function of a proxy server.Rate this question:
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- 49.
Which of the following is not one of the private address ranges?
- A.
192.168.x.x
- B.
10.x.x.x
- C.
172.16.x.x
- D.
224.181.x.x
Correct Answer
D. 224.181.x.xExplanation
Private address ranges are designed for use on private networks. The ranges are 10.x.x.x, 172.16.x.x to 172.32.x.x, and 192.168.x.x. Therefore, answers A, B, and C are all valid private IP address ranges.Rate this question:
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- 50.
Which of the following is a distance-vector routing protocol used on TCP/IP networks?
- A.
ARP
- B.
NLSP
- C.
OSPF
- D.
RIP
Correct Answer
D. RIPExplanation
RIP is a distance-vector routing protocol used on TCP/IP networks. Answer A is incorrect because ARP is a component of the TCP/IP protocol suite used to resolve MAC addresses to IP addresses. Answer B is incorrect because NLSP is a link-state routing protocol used on IPX networks. Answer C is incorrect because OSPF is a link-state routing protocol used on TCP/IP networks.Rate this question:
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Mar 20, 2023Quiz Edited by
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Aug 20, 2010Quiz Created by
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