CompTIA JK0-016 Online Practice Questions and Exam Preparation

CompTIA JK0-016 Online Questions & Answers

• Question 511:

  A network administrator needs to ensure there is no same channel interference for an 802.11n deployment with four WAPs. Which of the following channel setting configurations meets this criteria when using 40 MHz channels?

  A. 36, 40, 44, 48
  B. 36, 44, 52, 60
  C. 36, 44, 48, 52
  D. 36, 48, 60, 64
  B. 36, 44, 52, 60

• Question 512:

  Which of the following services are affected by closing the default ports of 80 and 21 via ACL on a company router?

  A. FTP and basic Internet traffic
  B. HTTPS and IMAP traffic
  C. DNS and TELNET traffic
  D. VPN and RDP traffic
  A. FTP and basic Internet traffic

• Question 513:

  Which of the following technologies can cause interference for 802.11g?

  A. RADAR
  B. 802.11a
  C. IrDA
  D. Bluetooth
  D. Bluetooth

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  This wireless communication standard has a maximum transmission speed of 54 Mbits per second and a typical indoor range of 30 meters. It uses the 2.4 GHz band. This band may have to deal with interference from cordless telephones, Bluetooth devices, and various appliances.

• Question 514:

  The network interface layer of the TCP/IP model corresponds with which of the following layers of the OSI model? (Select TWO).

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

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  The lowest layer of the OSI Reference Model is the physical layer, which is responsible for the "nitty gritty" details of transmitting information from one place to another on a network. The layer just above the physical layer is the data link layer, called the network interface layer or just the link layer in the TCP/IP architectural model. Its primary job is to implement networks at the local level, and to interface between the hardware-oriented physical layer, and the more abstract, software-oriented functions of the network layer and those above it.

• Question 515:

  Which of the following defines the amount of time a host retains a specific IP address before it is renewed or released?

  A. DHCP lease
  B. DNS suffix
  C. Subnet mask
  D. DHCP reservation
  A. DHCP lease

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  By default, each IP address assigned by a DHCP Server comes with a one-day lease, which is the amount of time that the address is valid.

• Question 516:

  Ann, a technician, installs a wireless router in a network closet in a large office. She then configures all workstations in various offices on that floor to use the wireless connection. Maximum connection speed at each workstation is 54 Mbps. Some users complain that their network connection is very slow. Which of the following is MOST likely the problem?

  A. Workstations were configured with the wrong connection speed on the wireless adapter.
  B. Users with a slow connection are too far away from the wireless router.
  C. Users that cannot connect are configured on the wrong channel.
  D. Wireless network SSID is incorrect.
  B. Users with a slow connection are too far away from the wireless router.

• Question 517:

  Joe has a small office and is looking to replace his phone system with a lower cost solution that requires minimal in-house support. Which of the following is the BEST choice?

  A. Wide Area Network
  B. NAT
  C. Virtual PBX
  D. Virtual LAN
  C. Virtual PBX

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  Virtual PBX, a business phone system providing call routing, follow-me calling, voice-mail, fax-mail, and ACD queues with no customer installed equipment.

• Question 518:

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

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

• Question 519:

  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 520:

  A technician has installed a group of layer 2 switches with multiple VLANs. The VLANs cannot talk to each other. Which of the following network devices could correct this problem? (Select TWO).

  A. Hub
  B. DNS server
  C. DHCP server
  D. Layer 3 switch
  E. Router
  D. Layer 3 switch
  E. Router