CompTIA Network+ certification 認定 JK0-023 試験問題:

1. Some visitors are unable to access the wireless network. The network's wireless infrastructure is comprised of three different buildings with the configurations listed below. Wireless network in Building A and C is used exclusively for internal employees and Building B is used for visitors and requires no additional configuration on their devices. Which of the following settings would need to be modified to provide wireless access to all visitors?
Building ABuilding BBuilding C
Channel: 2Channel: 6Channel: 11
Encryption: WPA2Encryption: WPA2Encryption: WPA2

A) Encryption set to Open in Building B
B) Channel set to 11 in Building B
C) Encryption set to WEP in Building B
D) Encryption set to Open in all Buildings

2. Which of the following devices implements CSMA/CA virtually through the RTS/CTS protocols?

A) Router
B) 802.11 AP
C) Firewall
D) Switch

3. Which of the following attack types is being used if the originating IP address has been spoofed?

A) Ping flood
B) Trojan
C) Worm
D) Smurf

4. A network technician performs several switch commands to enable various advanced features on the switch in the accounting department. During the configuration changes, several users from this department report connectivity issues. Which of the following logs
would the network technician need to analyze to troubleshoot the connectivity issues?

A) History logs
B) Event Viewer logs
C) Startup/bootup config logs
D) Router logs

5. An administrator is attempting to troubleshoot a program that is unable to resolve IP addresses from FQDNs. Which of the following commands is used to check reverse DNS settings?

A) ifconfig
B) nbtstat
C) dig
D) route

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