CompTIA JK0-016 Online Practice Questions and Exam Preparation

CompTIA JK0-016 Online Questions & Answers

• Question 101:

  Which of the following commands can a network technician use to check whether the DNS server for a given domain is reachable?

  A. nmap
  B. nbtstat
  C. dig
  D. arp
  C. dig

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  The command dig is a tool for querying DNS nameservers for information about host addresses, mail exchanges, nameservers, and related information. This tool can be used from any Linux (Unix) or Macintosh OS X operating system. The most typical use of dig is to simply query a single host.

• Question 102:

  A company has multiple WAPs within close proximity to each other to allow users to move about seamlessly through the building with their laptops, without losing any connection. However, this has had the opposite effect, causing any user that is close to two of the access points to constantly reconnect to the wireless network. Which of the following should be changed on all the WAPs to allow this to work as the customer intended?

  A. Change the SSID to be unique for each WAP.
  B. Change the antenna direction to be unique for each WAP.
  C. Change the encryption method to be unique for each WAP.
  D. Change the channel to be unique for each WAP.
  D. Change the channel to be unique for each WAP.

• Question 103:

  In which of the following layers of the OSI model would MAC addressing be found?

  A. Network
  B. Application
  C. Data Link
  D. Transport
  C. 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 104:

  Which of the following LAN technologies is used to provide a MAXIMUM bandwidth of 1Gbps through singlemode fiber?

  A. 10GBaseLR
  B. 100BaseFX
  C. 100BaseTX
  D. 1000BaseX
  D. 1000BaseX

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  1000BaseX identifies various Gigabit Ethernet physical layer standards as defined in IEEE802.3z, such as 1000BaseLX, 1000BaseSX, 1000BaseCX and 1000BaseLH. Basically, all standards included in 1000BaseX uses 8B/10B coding scheme with 8 bits of data and 2 bits of error-correction data. Each specification allows various cable (fiber or copper) lengths, and uses different cable media.

• Question 105:

  The network support team is constantly getting calls from users in a specific area of an office building. The users are able to connect to the office wireless network, but they sometimes disconnect or experience very slow download speeds. Which of the following is MOST likely the problem?

  A. Incorrect service set identifier
  B. Low signal strength or interference
  C. Incorrect encryption scheme
  D. Incorrect IP address or subnet mask
  B. Low signal strength or interference

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  This generally happens when the signals are weak in any particular area and any movement can make you lose connectivity to the internet. In this case you can try to increase the radio power so that the signal strength can be increased.

• Question 106:

  Which of the following cables supports 10Gbps throughput and 100 meters as the maximum distance?

  A. T1 crossover
  B. Singlemode fiber
  C. CAT6a
  D. Coaxial
  C. CAT6a

• Question 107:

  A network administrator opens up the RDP port to access network resources from home. Several months later, the administrator's account is getting locked out constantly. After closing the port, which of the following should be used to identify the source of the attack?

  A. Network maps
  B. Change management
  C. Log analysis
  D. Protocol analyzer
  C. Log analysis

• Question 108:

  Which of the following tools will scan a network for hosts and provide information on the installed operating system?

  A. DOCSIS
  B. NMAP
  C. IMAP
  D. BERT
  B. NMAP

• Question 109:

  Which of the following network topologies would be the BEST choice in providing network redundancy for an organization?

  A. Star
  B. Hybrid
  C. Mesh
  D. Point to Point
  C. Mesh

• Question 110:

  Which of the following configuration management documents is used to describe how a computer performs after initial installation onto a network?

  A. Baseline
  B. Network map
  C. Asset management
  D. Installation guide
  A. Baseline