CompTIA JK0-016 Online Practice Questions and Exam Preparation

CompTIA JK0-016 Online Questions & Answers

• Question 51:

  In contrast to earlier Wi-Fi speeds, which of the following BEST describes the antenna and channelization properties used in 802.11n?

  A. MIMO, DSSS
  B. MIMO, OFDM
  C. CSMA, DSSS
  D. CSMA, CDMA
  B. MIMO, OFDM

  ---

  802.11n builds upon previous 802.11 standards by adding multiple-input multiple-output (MIMO). The additional transmitter and receiver antennas allow for increased data throughput through spatial multiplexing and increased range by exploiting the spatial diversity through coding schemes like Alamouti coding. The speed is 150 Mbit/s (even 250 Mbit/s in PHY level)

• Question 52:

  Which of the following cable types supports the FURTHEST distance when connecting various MDFs?

  A. Multimode
  B. UTP
  C. Singlemode
  D. CAT6
  C. Singlemode

  ---

  Single-mode optical fiber (SMF) is an optical fiber designed to carry only a single ray of light (mode). These modes define the way the wave travels through space, i.e. how the wave is distributed in space.

• Question 53:

  Which of the following ports would have to be allowed through a firewall for POP3 traffic to pass on its default port?

  A. 110
  B. 123
  C. 143
  D. 443
  A. 110

  ---

  Post Office Protocol (POP) is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP3 server listens on well-known port 110.

• Question 54:

  Which of the following cable types is unshielded?

  A. STP
  B. Twinax
  C. UTP
  D. Coax
  C. UTP

• Question 55:

  GigSwitch1 is currently configured with a speed of 100 and Duplex is set to Auto on all interfaces. Interface 2 will be connected to GigSwitch2 which is used for all departments.

  Interface 1 will be used for HR traffic only.

  GigSwitch1 needs to be configured with the following parameters:

  Configure the necessary protocol to prevent switching loops.

  Configure GigSwitch1 with a /24 IP address for management.

  Traffic across Interface 1 needs to be forced to accept and receive up to 100Mbps data at the same time.

  Traffic across Interface 2 needs to be forced to use Gigabit speeds and maximum performance.

  Drag and drop the appropriate configurations to their corresponding requirements. All placeholders must be filled. Not all configurations will be used.

  Select and Place:

  

  

• Question 56:

  In order to limit the number of dynamic addresses of hosts on a network, which of the following can be implemented?

  A. Scope options
  B. Leases
  C. Reservations
  D. DNS suffixes
  A. Scope options

• Question 57:

  A user is unable to open up websites on the Internet from a browser. The administrator determines that the workstation can ping its local gateway, but not the remote web server. At which of the following layers of the OSI model does the problem MOST likely exist?

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

• Question 58:

  Which of the following reasons would MOST likely be used to implement QoS and traffic shaping solutions?

  A. Redundancy
  B. Fault tolerance
  C. Unified communications
  D. Uptime requirements
  C. Unified communications

  ---

  In unified communication video,voice,data have only one end gateway so to give priority to avoid delay in voice and video we use Qos.

• Question 59:

  Which of the following layers of the OSI model make up the Network Interface layer of the TCP/IP model? (Select TWO).

  A. Application
  B. Physical
  C. Presentation
  D. Transport
  E. Data Link
  F. Network
  B. Physical
  E. Data Link

• Question 60:

  Which of the following can a technician use when installing a wireless network in a lounge to prevent inappropriate website images?

  A. Content filter
  B. VPN concentrator
  C. Load balancer
  D. Proxy server
  A. Content filter