CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 591:

  Which of the following wireless standards provide speed of 11Mbps?

  A. 802.11a
  B. 802.11b
  C. 802.11g
  D. 802.11n
  B. 802.11b

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  802.11a - 54Mbps - OFDM 802.11b - 11Mbps - DSSS 802.11g - 54Mbps - OFDM/DSSS 802.11n - 150/300Mbps (MIMO) ?OFDM

• Question 592:

  A user has network connectivity per the link lights on the NIC, but cannot access any network resources or the Internet. Which of the following commands should the technician run FIRST?

  A. arp
  B. ipconfig
  C. tracert
  D. route
  B. ipconfig

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  As from ipconfig command technician will come to know wheather he has assigned right ip address to NIC or not.

• Question 593:

  Which of the following BEST describes a firewall that can be installed via Add/Remove programs on a Windows computer?

  A. Managed
  B. Software
  C. Hardware
  D. Wireless
  B. Software

• Question 594:

  Which of the following is the control when observing network bandwidth patterns over time?

  A. Network log
  B. Baseline
  C. Flow data
  D. Interface statistics
  B. Baseline

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  To successfully baseline a network it is important to consider two functions; performance at protocol level and performance at application level. There are many significant metrics to consider at the protocol level, but only a few which are critical. The most important is bandwidth utilization compared with bandwidth availability. The most likely cause of poor network performance is insufficient bandwidth. Trending bandwidth utilization allows you to recognize problem areas, provide enough bandwidth to reach performance objectives, and predict future capacity requirements. Changes in bandwidth utilization patterns also provide a clear indication of network usage alterations, such as a change in end-user behavior, or the unauthorized addition of an application.

• Question 595:

  A technician needs to restrict access to a SOHO wireless network to specific devices. Which of the following would MOST likely be used with minimal client configuration?

  A. Port filtering
  B. WEP
  C. MAC address filtering
  D. PoE
  C. MAC address filtering

• Question 596:

  A network administrator is setting up a WAP and wants to disable the ability of gaining access from the parking garage. Which of the following should the network administrator review?

  A. Signal strength
  B. SSID name
  C. WPA2 encryption
  D. WEP encryption
  A. Signal strength

• Question 597:

  Which of the following network protocols is used to transport email between servers?

  A. IMAP4
  B. POP3
  C. SNMP
  D. SMTP
  D. SMTP

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  While electronic mail servers and other mail transfer agents use SMTP to send and receive mail messages, user-level client mail applications typically use SMTP only for sending messages to a mail server for relaying

• Question 598:

  On which of the following OSI model layers would a MAC address be used?

  A. Network
  B. Data Link
  C. Transport
  D. Physical
  B. 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 599:

  A user informs the network administrator of increasingly common wireless connection problems. The administrator determines the user has recently received a new cordless phone. The phone is MOST likely causing which of the following conditions?

  A. Signal strength latency
  B. Bouncing signal
  C. Interference
  D. Crosstalk
  C. Interference

• Question 600:

  A customer with a SOHO requires fast, secure, cost-effective access to the Internet. Which of the following would be the MOST appropriate solution? (Select TWO).

  A. OC3 line with built-in firewall
  B. DS3 line with a separate firewall
  C. Cable modem with a separate firewall
  D. Dial-up modem with separate firewall
  E. DSL router with firewall capabilities
  C. Cable modem with a separate firewall
  E. DSL router with firewall capabilities