CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 511:

  Which of the following wireless standards uses a block encryption cipher rather than a stream cipher?

  A. WPA2-CCMP
  B. WPA
  C. WEP
  D. WPA2-TKIP
  A. WPA2-CCMP

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  Counter Cipher Mode with Block Chaining Message Authentication Code Protocol or CCMP (CCM mode Protocol) is an encryption protocol designed for Wireless LAN products that implement the standards of the IEEE 802.11i amendment to the original IEEE 802.11 standard. CCMP is an enhanced data cryptographic encapsulation mechanism designed for data confidentiality and based upon the Counter Mode with CBC-MAC (CCM) of the AES standard. It was created to address the vulnerabilities presented by WEP, a dated, insecure protocol.

• Question 512:

  A network administrator wants to add the firewall rule to allow SSH traffic to the FTP server with the assigned IP 192.168.0.15 from the Internet. Which of the following is the correct firewall rule?

  A. Allow ANY to 192.168.0.15 port 21
  B. Allow ANY to 192.168.0.15 port 22
  C. Allow ANY to 192.168.0.15 port 80
  D. Allow ANY to ANY port ANY
  B. Allow ANY to 192.168.0.15 port 22

• Question 513:

  Which of the following is the FASTEST Ethernet technology?

  A. 10GBaseSR
  B. 10BaseT
  C. 100BaseFX
  D. 1000BaseT
  A. 10GBaseSR

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  10GBASE-SR ("short range") is a port type for multi-mode fiber and uses 850 nm lasers. Its Physical Coding Sublayer 64b/66b PCS is defined in IEEE 802.3 Clause 49 and its Physical Medium Dependent PMD in Clause 52. It delivers serialized data at a line rate of 10.3125 Gbit/s.

• Question 514:

  Frame relay occurs at which of the following layers of the OSI model?

  A. Layer 1
  B. Layer 2
  C. Layer 4
  D. Layer 6
  B. Layer 2

• Question 515:

  A network administrator decides to secure their small network by allowing only specific MAC addresses to gain access to the network from specific switches. Which of the following is described by this example?

  A. Packet filtering
  B. Hardware firewalls
  C. Port security
  D. Stateful inspection
  C. Port security

• Question 516:

  Drag and drop the fiber cable connection types to the appropriate image.

  Select and Place:

  

  

• Question 517:

  Which of the following is used for SONET connections and requires a wavelength of 1310nm?

  A. 10GBASECX4
  B. 10GBASELX4
  C. 10GBASELW
  D. 10GBASESR
  C. 10GBASELW

• Question 518:

  Which of the following WAN technologies has synchronous up/down speeds?

  A. T1
  B. ADSL
  C. Satellite
  D. Cable broadband
  A. T1

• Question 519:

  Which of the following defines the pinout of an 8P8C eight pin modular jack for a CAT6a cable?

  A. 568B
  B. RJ-11
  C. RJ-45
  D. RS-232
  A. 568B

• Question 520:

  A technician is troubleshooting authentication issues on a server. It turns out the clock on the server was 72 minutes behind. Setting the clock to the correct time fixed the issue. Given the scenario, which of the following authentication methods was being used?

  A. Kerberos
  B. CHAP
  C. TACACS+
  D. RADIUS
  A. Kerberos

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  Kerberos is a distributed authentication service that allows a process (a client) running on behalf of a principal (a user) to prove its identity to a verifier (an application server, or just server) without sending data across the network that might allow an attacker or the verifier to subsequently impersonate the principal. Kerberos optionally provides integrity and confidentiality for data sent between the client and server.