CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 691:

  Which of the following is the OSI layer that handles file compression such as LZMA or DEFLATE?

  A. Layer 3
  B. Layer 5
  C. Layer 6
  D. Layer 7
  C. Layer 6

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  The presentation level is translator between the application and network format. Unlike the lower layers, its concern is with the syntax and semantics of the information transmitted. Most user programs do not exchange random binary bit strings. They exchange data such as names, addresses, dates, etc. Different computers store the data in a different way. In order to allow these computers to transmit the data to each other the presentation layer translates the data into a standard form to be used on the network. Another function is data compression which can be used to reduce the number of bits needed to send the packet of information. Security is also added at this layer by using data encryption and decryption. This prevents others from intercepting the data and being able to decipher the meaning of the bits.

• Question 692:

  A network administrator is tasked with blocking unwanted spam 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 693:

  Which of the following remote access types requires a certificate for connectivity?

  A. SSH
  B. PPP
  C. HTTPS
  D. WEP
  A. SSH

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  Secure Shell (SSH) is a cryptographic network protocol for secure data communication, remote command-line login, remote command execution, and other secure network services between two networked computers that connects, via a secure channel over an insecure network, a server and a client (running SSH server and SSH client programs, respectively)

• Question 694:

  A technician sees suspicious traffic coming from a computer connected to a WAP. Which of the following can be used to stop this traffic while troubleshooting the problem?

  A. tracert
  B. QoS
  C. ipconfig
  D. MAC filtering
  D. MAC filtering

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  By doing MAC filtering technician can block the data coming from a specific mac address.

• Question 695:

  Which of the following can be described as a DoS attack?

  A. Disabling a specific system and making it unavailable to users
  B. Implementing a keylogger
  C. Intercepting a packet and decrypting the contents
  D. Communicating with employees to get company information
  A. Disabling a specific system and making it unavailable to users

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  A denial of service (DoS) attack is a malicious attempt to make a server or a network resource unavailable to users, usually by temporarily interrupting or suspending the services of a host connected to the Internet.

• Question 696:

  A technician would like to connect two separate LAN networks at a small business for a short period of time, to share files. The connection needs to be temporary, and is physically impossible using standard network cabling. Which of the following is the BEST way to connect the networks in this situation?

  A. Wireless repeater
  B. Wireless bridge
  C. Bluetooth
  D. RADIUS server
  B. Wireless bridge

• Question 697:

  Users have been stating that they need to logon to too many applications and web apps with different credentials that use different rule sets. Which of the following would BEST address these concerns?

  A. Alter the domain account login policies to reflect the most common application rule sets.
  B. Ensure that the user accounts are properly configured in domain services.
  C. Implement a software solution that facilitates single sign-on authentication.
  D. Increase the time between mandatory password changes by a factor of three.
  C. Implement a software solution that facilitates single sign-on authentication.

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  A single signon permits a user to enter one name and password in order to access multiple applications

• Question 698:

  Which of the following DNS records is used in conjunction with 192:168::1:10?

  A. AAAA
  B. MX
  C. TXT
  D. PTR
  A. AAAA

• Question 699:

  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 700:

  The address 6FFE:FFFF:0000:2F3B:04AC:00FF:FEBE:5C4A is an example of which of the following?

  A. APIPA
  B. MAC
  C. IPv4
  D. IPv6
  D. IPv6