CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 621:

  Which of the following ports would have to be allowed through a firewall for POP3 traffic to pass on its default port?

  A. 110
  B. 123
  C. 143
  D. 443
  A. 110

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  Post Office Protocol (POP) is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP3 server listens on well-known port 110.

• Question 622:

  Which of the following protocols are used to view and send mail from a local host off of a remote server? (Select TWO).

  A. TFTP
  B. SNMP
  C. POP3
  D. IMAP4
  E. SFTP
  C. POP3
  D. IMAP4

• Question 623:

  At which of the following layers of the OSI model do packets exist?

  A. Network
  B. Session
  C. Data Link
  D. Transport
  A. Network

• Question 624:

  A technician has low signal strength connecting two wireless bridges. Which of the following could be the problem?

  A. Low PoE wattage
  B. Opposing antenna polarizations
  C. Short distance between antennas
  D. WPA 2 encryption
  B. Opposing antenna polarizations

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  The polarization of an antenna is the orientation of the electric field (E-plane) of the radio wave with respect to the Earth's surface and is determined by the physical structure of the antenna and by its orientation. It has nothing in common with

  antenna directionality terms:

  "horizontal", "vertical", and "circular". Thus, a simple straight wire antenna will have one polarization when mounted vertically, and a different polarization when mounted horizontally.

• Question 625:

  Which of the following wiring distribution types, often found in company closets, is used to connect wiring from individual offices to the main LAN cabling?

  A. MDF
  B. 66 block
  C. IDF
  D. Patch panel
  D. Patch panel

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  A patch panel, patch bay, patch field or jack field is a number of circuits, usually of the same or similar type, which appear on jacks for monitoring, interconnecting, and testing circuits in a convenient, flexible manner.

• Question 626:

  Which of the following VPN technologies uses IKE and ISAKMP for key exchange?

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

• Question 627:

  Which of the following exist at layer three of the OSI model? (Select TWO).

  A. NIC
  B. Switch
  C. Frame
  D. Packet
  E. Router
  F. Cable
  D. Packet
  E. Router

• Question 628:

  Which of the following security appliances would be used to only analyze traffic and send alerts when predefined patterns of unauthorized traffic are detected on the network?

  A. Host based IPS
  B. Network based firewall
  C. Signature based IDS
  D. Behavior based IPS
  C. Signature based IDS

• Question 629:

  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 630:

  A client's computer is unable to access any network resources. Which of the following utilities can a technician use to determine the IP address of the client's machine?

  A. ipconfig
  B. nslookup
  C. dig
  D. tracert
  A. ipconfig

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  ipconfig is a commmand line utility available on all versions of Microsoft Windows starting with Windows NT. ipconfig is designed to be run from the Windows command prompt. This utility allows you to get the IP address information of a Windows computer. It also allows some control over active TCP/IP connections. ipconfig is an alternative to the older 'winipcfg' utility.