CompTIA JK0-016 Online Practice Questions and Exam Preparation

CompTIA JK0-016 Online Questions & Answers

• Question 151:

  A customer has requested a solution using multiple WAPs for wireless access. Which of the following should be different on each WAP to prevent wireless problems?

  A. Firewalls
  B. VLANs
  C. Channels
  D. Antenna types
  C. Channels

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  Protocol requires 16.25 to 22 MHz of channel separation (as shown above), adjacent channels overlap and will interfere with each other.

  Channels 1, 6, and 11 are the most common channels to choose, and most routers will use one of them as the default channel--but the general idea is to be as far away from everybody else as you can.

• Question 152:

  A network administrator has been tasked to deploy a new WAP in the lobby where there is no power outlet. Which of the following options would allow the network administrator to ensure the WAP is deployed correctly?

  A. QoS
  B. Install 802.11n WAP
  C. PoE
  D. Parabolic antenna
  C. PoE

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  Power over Ethernet or PoE describes any of several standardized or ad-hoc systems which pass electrical power along with data on Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as wireless access points or IP cameras.

• Question 153:

  Two workstations are unable to communicate on the network despite having known good cables. When one device is unplugged from the network the other device functions properly. Which of the following could be the cause of this failure?

  A. Duplicate IP address
  B. Incorrect subnet mask
  C. Incorrect gateway
  D. Wrong DNS
  A. Duplicate IP address

• Question 154:

  A small office client is requesting a network redesign. Both wired and wireless devices must connect to the network. All of the wireless devices can communicate using the latest standards. The building has a long courtyard in the middle with reinforced walls, which extends up through all the floors. The distance from the switch to the furthest drop is 88 meters. Which of the following is the correct network redesign choice?

  A. Fiber optic cabling is necessary due to distance limitations.
  B. The wireless network should be 802.11b due to equipment limitations.
  C. One WAP will be sufficient to provide wireless coverage to the floor.
  D. The wired network should be run with at least CAT6 cabling.
  D. The wired network should be run with at least CAT6 cabling.

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  The Category 6 cable, also known as Cat-6, is backward compatible with the Category 5/5 e and Category 3 cable standards. It can create a high speed computer network and operate at an optimal performance if other components in the network are compatible with gigabit speeds.

  AdvantagE. Speed and Performance

  The cable can handle speed performance of up to 250 MHZ. This fast performance makes it possible to use with a fast ethernet network including Gigabit Ethernet and 10-Gigabit Ethernet. The whole generation of the Cat 6 cable was introduced to complement the Gigabit Ethernet which includes interface cards, patch panels, routers, switches, and other components which is developed to achieve a full gigabit network. Many IT professionals realized that the Cat 6 cable provide very fast network

  performance and can deliver gigabit speeds.

  AdvantagE. Similar Structure with Cat 5 Cable

  Cat 6 cable has a similar structure to the Cat 5 and Cat 5e. The Cat 6, Cat 5 and Cat 5e cables have 8 wires that are twisted together to form four pairs. The difference is that one pair of the wires in the Cat 6 cable is kept from contacting with others so that it can produce double the bandwidth of the Cat 5 and Cat 5e.

  AdvantagE. Backward Compatible

  The plug and port of the Cat 6 cable is the same as the Cat 5 and Cat 5e. Therefore, it can be plugged into any port or connection that supports both of those cables. If you use the Cat 5 port, it will not yield the full speed that it is capable of handling. Instead, it will operate at the speed of the computer or cable. However, the speed will be acceptable.

  AdvantagE. Upgradable

  If upgrading to a more optimal network, the Cat 6 cable should be included in part of the upgrade. The Cat 6 cable will not operate at the full speed if other units in the network does not support gigabit speeds. Small businesses that are starting should consider installing the Cat 6 cable since it is becoming the industry standard.

  Exam C

• Question 155:

  An IP address is encapsulated at which of the following layers of the OSI model?

  A. Transport
  B. Data link
  C. Network
  D. Application
  C. Network

• Question 156:

  Assigning the same IP address to a network device is which of the following?

  A. SSID
  B. Scope
  C. Reservation
  D. Lease
  C. Reservation

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  You might want to assign network printers and certain servers DHCP reservations to ensure that they always have the same IP address, but continue to receive updated configuration information from the DHCP server. For example, create reservations for servers that must always have the same IP address.

• Question 157:

  A network administrator is tasked with blocking unwanted spam which is being relayed by an internal email server. Which of the following is the FIRST step in preventing spam that is originating from bots on the network?

  A. Closing off port 25 on the firewall
  B. Closing off port 53 on the firewall
  C. Turning off the SMTP service on the email server
  D. Turning off the IMAP service on the email server
  A. Closing off port 25 on the firewall

• Question 158:

  Which of the following protocols works at the LOWEST layer of the OSI model?

  A. L2TP
  B. PPTP
  C. ISAKMP
  D. IPSec
  A. L2TP

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  Layer Two Tunneling Protocol (L2TP) is an extension of the Point-to-Point Tunneling Protocol (PPTP) used by an Internet service provider (ISP) to enable the operation of a virtual private network (VPN) over the Internet.

• Question 159:

  Users are reporting that some Internet websites are not accessible anymore. Which of the following will allow the network administrator to quickly isolate the remote router that is causing the network communication issue, so that the problem can be reported to the appropriate responsible party?

  A. Ping
  B. Protocol analyzer
  C. Tracert
  D. Dig
  C. Tracert

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  Tracet command will tell the administrator which route is not present or which is present so he will come to know whether he has appropriate route or not.

• Question 160:

  Users report that they are unable to access any external websites. The local intranet is not affected. A network technician has isolated the problem to a Linux-based server. Which of the following commands will enable the technician to view DNS information on the Linux- based server?

  A. nbtstat
  B. ipconfig
  C. dig
  D. netstat
  C. dig

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  By dig command technician will come to know wheather name resolution is happening in correc way or not.