CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 291:

  Which of the following is a common LAN protocol used for a SOHO?

  A. ATM
  B. DSL
  C. Ethernet D. HDLC
  C. Ethernet D. HDLC

• Question 292:

  The Network Interface Layer of the TCP/IP model corresponds to which of the following layers of the OSI model? (Select TWO).

  A. Network
  B. Session
  C. Transport
  D. Physical
  E. Data link
  D. Physical
  E. Data link

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  The network layer is responsible for packet forwarding including routing through intermediate routers, whereas the data link layer is responsible for media access control, flow control and error checking.

• Question 293:

  DHCP uses which of the following ports by default?

  B. 23
  C. 68
  D. 443
  C. 68

• Question 294:

  The company requires all users to authenticate to the network with a smart card, a pin number, and a fingerprint scan. Which of the following BEST describes the user authentication being used?

  A. Multi-factor authentication
  B. Two-factor authentication
  C. Biometrics
  D. Single sign-on
  A. Multi-factor authentication

• Question 295:

  A technician has been dispatched to investigate an issue where several users in the same aisle have stated they have had no network connection for over an hour. When the technician gets there, the network seems to be up and running. Which of the following should the technician do NEXT?

  A. Ask the users for more information, such as which applications were not functioning.
  B. Power-cycle the switch that the users share to clear out cached DNS records.
  C. Escalate the issue to the network administrator to have their domain credentials reset.
  D. Close and document the service call, as there was no actual issue affecting the users.
  A. Ask the users for more information, such as which applications were not functioning.

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  Because the system was up and running when the technician reached there, he can ask for applications that were not working or can ask for more information so that he can isolate the problem. Power cycling will not help because the system is already up and recycling can wipe out logs. Escalation will also not help because the system is now up and running. Closing the call will be unfair because the same instance can occur again.

• Question 296:

  Wireless network users recently began experiencing speed and performance issues after access point 2 (AP2) was replaced due to faulty hardware. The original network was

  installed according to a consultant's specifications and has always worked without a problem.

  You a network technician, have been tasked with evaluating the situation and resolving the issues to improve both performance and connectivity. Refer to the following diagram and perform any Necessary changes to the wireless and wired

  infrastructure by adjusting devices.

  Note. Adjust the LEAST number of devices needed to fix the issue all blue icons in the image are clickable.

  

  

  Correct Answer. AP2 configuration is not correct. The wireless mode should be - and channel should be -1- For the wired interface, the speed should be set to 100 and duplex to -Null- Click -Submit-
  AP2 configuration is not correct. The wireless mode should be - and channel should be -1- For the wired interface, the speed should be set to 100 and duplex to -Null- Click -Submit-

• Question 297:

  Which of the following wireless router security measures provides access to a network by allowing only devices on an approved physical address list?

  A. Port filtering
  B. MAC filtering
  C. SSID masking
  D. Port forwarding
  B. MAC filtering

• Question 298:

  A technician has configured a router to authenticate VPN users to an LDAP server on the network. In order to allow the authentication service, both UDP and TCP ports needed to be allowed on the router. Which of the following services was MOST likely used?

  A. Kerberos
  B. TACACS+
  C. RADIUS
  D. 802.1x
  C. RADIUS

• Question 299:

  Users are reporting wired connectivity drops in a new office with brand new CAT6 infrastructure. Which of the following tools should a technician use to BEST troubleshoot this issue?

  A. OTDR
  B. Protocol analyzer
  C. Toner probe
  D. Cable certifier
  D. Cable certifier

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  A cable certifier is an electronic device used to verify the source of electric current, voltage and a switching matrix used to connect the current source and the volt meter to all of the contact points in a cable.

• Question 300:

  A technician is unable to easily trace physical connections within a network rack. Which of the following practices would save time in the future?

  A. Change management
  B. Cable management
  C. Asset management
  D. Setting baselines
  B. Cable management