CompTIA JK0-016 Online Practice Questions and Exam Preparation

CompTIA JK0-016 Online Questions & Answers

• Question 71:

  A cable with visible space between the ends of the copper wires and the RJ-45 connector will cause which of the following problems to occur?

  A. EMI
  B. Short
  C. Reversed TXRX
  D. dB loss
  B. Short

• Question 72:

  Which of the following is the BEST way to prevent new users from connecting to a wireless access point, but still allow already connected users to continue to connect?

  A. Create a MAC filter containing the current users.
  B. Turn off SSID broadcast.
  C. Change the encryption type to AES 256-bit for current users.
  D. Reduce the signal strength to 0 percent.
  A. Create a MAC filter containing the current users.

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  MAC Filtering (or EUI filtering, or layer 2 address filtering) refers to a security access control method whereby the 48-bit address assigned to each network card is used to determine access to the network.

  MAC addresses are uniquely assigned to each card, so using MAC filtering on a network permits and denies network access to specific devices through the use of blacklists and whitelists. While the restriction of network access through the use of lists is straightforward, an individual person is not identified by a MAC address, rather a device only, so an authorized person will need to have a whitelist entry for each device that he or she would use to access the network.

• Question 73:

  A technician is implementing a wireless network at a small business. The business already has a certificate authority and RADIUS server that they would like the technician to integrate with the wireless network. Additionally, the business would like to utilize their legacy 802.11b TKIP printers. Which of the following configurations should the technician use?

  A. 802.11a with WPA2-Enterprise
  B. 802.11n with WPA-PSK
  C. 802.11n with WPA2-PSK
  D. 802.11g with WPA-Enterprise
  D. 802.11g with WPA-Enterprise

• Question 74:

  Which of the following would be used to run an instance of a Layer 2 device within an application?

  A. Virtual switch
  B. Virtual router
  C. Virtual PBX
  D. NaaS
  A. Virtual switch

• Question 75:

  Which of the following is the wireless encryption standard associated with WPA2?

  A. AES-CCMP
  B. EAP
  C. WEP
  D. 802.1x
  A. AES-CCMP

• Question 76:

  Which of the following wireless technologies only uses the 5GHz spectrum but reaches a theoretical throughput of only 54Mbps?

  A. A
  B. B
  C. G
  D. N
  A. A

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  802.11a standard uses the same core protocol as the original standard, operates in 5 GHz band, and uses a 52-subcarrier orthogonal frequency-division multiplexing (OFDM) with a maximum raw data rate of 54 Mbit/s, which yields realistic net achievable throughput in the mid-20 Mbit/s. The data rate is reduced to 48, 36, 24, 18, 12, 9 then 6 Mbit/s if required.

• Question 77:

  Which of the following is the FASTEST Ethernet technology?

  A. 10GBaseSR
  B. 10BaseT
  C. 100BaseFX
  D. 1000BaseT
  A. 10GBaseSR

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  10GBASE-SR ("short range") is a port type for multi-mode fiber and uses 850 nm lasers. Its Physical Coding Sublayer 64b/66b PCS is defined in IEEE 802.3 Clause 49 and its Physical Medium Dependent PMD in Clause 52. It delivers serialized data at a line rate of 10.3125 Gbit/s.

• Question 78:

  A technician has been tasked to set-up a managed switch. Which of the following will the technician need to accomplish this task?

  A. IP address
  B. Switch serial number
  C. VLAN tag
  D. Loopback plug
  A. IP address

• Question 79:

  A network administrator wants to perform a test to see if any systems are passing clear text through the network. Which of the following would be used?

  A. Social engineering
  B. Packet sniffing
  C. Rogue access point
  D. Man-in-the-middle
  B. Packet sniffing

• Question 80:

  A user is unable to connect to a remote computer using RDP. The technician checks the firewall rules and notes that there is no rule that blocks RDP. Which of the following features of the firewall is responsible for blocking RDP?

  A. Stateful inspection
  B. NAT/PAT
  C. Port security
  D. Implicit deny
  D. Implicit deny