CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 731:

  Users are reporting that some Internet websites are not accessible anymore. Which of the following will allow the network administrator to quickly isolate the remote router that is causing the network communication issue, so that the problem can be reported to the appropriate responsible party?

  A. Ping
  B. Protocol analyzer
  C. Tracert
  D. Dig
  C. Tracert

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  Tracet command will tell the administrator which route is not present or which is present so he will come to know whether he has appropriate route or not.

• Question 732:

  Which two layers of the OSI model make up the TCP/IP model Network Interface layer?

  A. Application and Transport
  B. Transport and Session
  C. Physical and Data Link
  D. Session and Presentation
  C. Physical and Data Link

• Question 733:

  Linking two or more switches together so that they can share VLAN information is known as which of the following?

  A. Port replicating
  B. Filtering
  C. Trunking
  D. Spoofing
  C. Trunking

• Question 734:

  At which layer of the OSI and TCP/IP model would HTTP and FTP be found?

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

• Question 735:

  Users inform an administrator that the network is slow. The administrator notices the bulk of the traffic is SIP and RTP traffic. Which of the following could the administrator do to help BEST alleviate the traffic congestion for the users?

  A. Create an ACL on the switches and routers that are dropping SIP and RTP packets.
  B. Create a QoS policy prioritizing users over RTP and SIP traffic.
  C. Create another VLAN for SIP and RTP traffic.
  D. Create a rule to throttle SIP and RTP to 10Kbps or less.
  C. Create another VLAN for SIP and RTP traffic.

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  As if we will create a vlan for sip and rtp traffic only this traffic will flow from the ports then .

• Question 736:

  A technician has a network with a mix of newer and older equipment. Which of the following settings would dynamically configure whether to use full or half duplex?

  A. Transmission speed
  B. Frequency
  C. Auto-negotiate
  D. Distance
  C. Auto-negotiate

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  Autonegotiation is an Ethernet procedure by which two connected devices choose common transmission parameters, such as speed, duplex mode, and flow control. In this process, the connected devices first share their capabilities regarding these parameters and then choose the highest performance transmission mode they both support.

• Question 737:

  A network technician has configured a new firewall with a rule to deny UDP traffic. Users have reported that they are unable to access Internet websites. The technician verifies this using the IP address of a popular website. Which of the following is the MOST likely cause of the error?

  A. Implicit deny
  B. HTTP transports over UDP
  C. Website is down
  D. DNS server failure
  A. Implicit deny

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  In a network firewall ruleset if a certain type of traffic isn't identified it will be denied or stopped by Implicit Deny.

• Question 738:

  An administrator needs to open ports in the firewall to support both major FTP transfer modes. Which of the following default ports was MOST likely opened? (Select TWO)

  A. 20
  B. 21
  C. 22
  D. 23
  E. 25
  F. 53
  A. 20
  B. 21

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  FTP use both port 21 and 20 (port 21 for the command port and port 20 for the data).

• Question 739:

  Which of the following is the MOST secure way to prevent malicious changes to a firewall?

  A. SNMPv2 access only
  B. TELNET access only
  C. SSH access only
  D. Console access only
  D. Console access only

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  Console access requires physical access to the device, so this is the most secure method.

• Question 740:

  During a disaster recovery test, several billing representatives need to be temporarily setup to take payments from customers. It has been determined that this will need to occur over a wireless network, with security being enforced where possible. Which of the following configurations should be used in this scenario?

  A. WPA2, SSID enabled, and 802.11n.
  B. WEP, SSID enabled, and 802.11b.
  C. WEP, SSID disabled, and 802.11g.
  D. WPA2, SSID disabled, and 802.11a.
  D. WPA2, SSID disabled, and 802.11a.

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  WPA2 is a security technology commonly used on Wi-Fi wireless networks. WPA2 (Wireless Protected Access 2) replaced the original WPA technology on all certified Wi-Fi hardware since 2006 and is based on the IEEE 802.11i technology standard for data encryption.