CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 651:

  Which of the following is used to register and resolve IP addresses with their plain language equivalents?

  A. Proxy server
  B. DNS server
  C. Brouter equipment
  D. DHCP server
  B. DNS server

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  DNS server translate (resolution) the human-memorable domain names and hostnames into the corresponding numeric Internet Protocol (IP) addresses.

• Question 652:

  A user enters a password into a logon box on a PC. The server and the PC then compare one-way hashes to validate the password. Which of the following methods uses this process?

  A. PKI
  B. Kerberos
  C. Single sign-on
  D. CHAP
  D. CHAP

• Question 653:

  Which of the following would be used in a firewall to block incoming TCP packets that are not from established connections?

  A. Access control lists
  B. Port address translation
  C. Blocking unauthorized ports
  D. Stateful inspection
  D. Stateful inspection

• Question 654:

  In order for switching loops to be automatically disabled, which of the following needs to be implemented?

  A. Routing tables
  B. Collision domains
  C. Port mirroring
  D. Spanning-tree protocol
  D. Spanning-tree protocol

• Question 655:

  In which of the following layers of the OSI model would MAC addressing be found?

  A. Network
  B. Application
  C. Data Link
  D. Transport
  C. Data Link

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  The ITU-T G.hn standard, which provides high-speed local area networking over existing wires (power lines, phone lines and coaxial cables), includes a complete data link layer which provides both error correction and flow control by means of a selective repeat Sliding Window Protocol.

• Question 656:

  The DHCP server leases IP addresses 10.162.233.158 to WBAC11 for a period of 14 days. At which of the following times would WBAC11 send an initial request to the DHCP server to renew the IP address lease?

  A. Day 4
  B. Day 6
  C. Day 8
  D. Day 10
  C. Day 8

• Question 657:

  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?

  A. Closing off port 25 on the firewall
  B. Closing off port 53 on the firewall
  C. Turning off the SMTP service on the email server D. Turning off the IMAP service on the email server
  A. Closing off port 25 on the firewall

• Question 658:

  Which of the following cables has a hard plastic cross inside the cable to separate each pair of wires?

  A. Coaxial
  B. CAT3
  C. CAT5
  D. CAT6a
  D. CAT6a

• Question 659:

  A technician has been given the task to install a wireless network in a user's home. Which of the following should the technician consider when implementing the network? (Select TWO).

  A. That there is strong encryption enabled and configured on the access point.
  B. The user's home network has a correctly completed WHOIS entry.
  C. The access point is broadcasting the SSID based upon manufacturer's standards.
  D. There are no conflicts of channels in use by neighboring wireless networks.
  E. There are redundant internal DNS names set in the access point's settings.
  F. That the access point's MAC address is properly set in its configuration settings.
  A. That there is strong encryption enabled and configured on the access point.
  D. There are no conflicts of channels in use by neighboring wireless networks.

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  Strong encryption is required to keep the user's internet safe and secure so as to avoid misuse of the internet connection and to ensure that channel conflicts are not there so that the signals do not compete with each other and user start to face intermittent connection.

• Question 660:

  Which of the following uses types and codes rather than ports?

  A. EIGRP
  B. ICMP
  C. UDP
  D. IPv6
  B. ICMP