NO.1 Users are reporting a large decrease in network performance. After further investigation, the
network administrator notices large amounts of traffic coming from a specific IP address. The
network administrator needs to identify the payload of the network traffic. Which of the following
could be used to collect that information?
A. ping
B. route
C. ipconfig
D. sniffer
Answer: D
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NO.2 Which of the following would a network administrator use to scan a network for vulnerabilities
?
A. NMAP
B. ICMP
C. ACL
D. TCPDUMP
Answer: A
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NO.3 A technician suspects invalid information in the local DNS cache of a workstation. Which of the
following commands can be used to clear this?
A. ifconfig
B. ipconfig
C. dig
D. nslookup
Answer: B
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NO.4 A layer 3 switch can move packets between subnets based on which of the following criteria?
A. 802.1q tag
B. IP address
C. Application
D. Port
Answer: B
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NO.5 A user is getting very weak signals while trying to connect to the wireless. Which of the
following should the user do to help with signal strength?
A. Install a hub to ensure there is a clear path for the cables to run.
B. Reinstall the operating system to the PC to ensure the newest patches are installed.
C. Call the wireless provider and ask for a T3 circuit.
D. Move the wireless router to a better location where line of sight is obtained.
Answer: D
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NO.6 Which of the following is a Class A private IP address?
A. 192.168.0.100
B. 169.254.9.15
C. 4.2.2.2
D. 10.1.1.45
Answer: D
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NO.7 Zach, an administrator, needs to install a new 100 foot (30 meter) cable run from an IDF switch
to the MDF, through a room that has a large number of motors. Which of the following would be the
BEST cable type to choose?
A. CAT3
B. STP
C. Coaxial
D. Fiber
Answer: D
NO.8 Which of the following can be configured on a managed network switch to send real time alerts
to a technician?
A. SSID
B. SNMP
C. Syslog
D. SMTP
Answer: B
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Exam Code: JK0-023Exam Name: CompTIA Network+ certification
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JK0-023 Latest Dumps Total Q&A: 995 Questions and Answers
Last Update: 10-26,2015
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