CompTIA Network+ certification - JK0-023 模擬練習
Users report that an internal web server is not responding. Which of the following commands could be used on the server to confirm that the web service is running?
正解: B
Which of the following subnet masks indicate a subnet with exactly 254 assignable IP addresses?
正解: D
The network install is failing redundancy testing at the MDF. The traffic being transported is a mixture of multicast and unicast signals. Which of the following would BEST handle the rerouting caused by the disruption of service?
正解: A
A network administrator is tasked with blocking unwanted spam which is being relayed by
an internal email server. Which of the following is the FIRST step in preventing spam that is originating from bots on the network?
an internal email server. Which of the following is the FIRST step in preventing spam that is originating from bots on the network?
正解: A
Which of the following network tools is used to identify running services on host devices?
正解: B
A technician has been dispatched to investigate connectivity problems of a recently renovated office. The technician has found that the cubicles were wired so that the network cables were run inside the conduit with the electrical cabling. Which of the following would MOST likely resolve the connectivity issue?
正解: B
A network administrator tests a multimode fiber cable from end-to-end on a new link that is down and notices that the dB loss is -.09. Which of the following is the MOST likely cause?
正解: A
A network technician visits a site that needs voice connectivity to the corporate office and installs four IP phones. The phone exchange resides at the telephone company. Which of the following technologies is being used?
正解: C
A technician is having issues accessing the Internet from the workstation. They are able to ping the DNS server and their default gateway. Which of the following commands can be used to verify DNS is functioning properly?
正解: D
Which of the following network protocols is used to transport email between servers?
正解: C
After installing a SOHO wireless router, Joe, the network administrator, notices that all internal RFC 1918 IP addresses are being logged by an Internet web server as coming from the router's public interface IP address. Which of the following must Joe implement to assign a different public IP from the router's public interface IP address to one of the workstations in the office?
正解: A
A SOHO had their wireless network breached on several occasions. The user turned off the SSID and enabled WEP encryption, but breaches are still occurring. Which of the following will improve security and MOST likely prevent future breaches?
正解: B
Which of the following would be used in an IP-based video conferencing deployment? (Select TWO).
正解: A,E