CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 771:

  Which of the following must a technician enable on a switch in order to be able to view all of the packets traversing a switch using a packet sniffer?

  A. STP
  B. Port Mirroring
  C. VLANs
  D. PoE
  B. Port Mirroring

• Question 772:

  At which of the following layers of the OSI model is the Logical Link Control found?

  A. Layer 2
  B. Layer 3
  C. Layer 4
  D. Layer 5
  A. Layer 2

• Question 773:

  Which of the following is the common port used for IMAP?

  A. 25
  B. 53
  C. 143
  D. 443
  C. 143

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  The Internet Message Access Protocol (commonly known as IMAP) is an Application Layer Internet protocol that allows an e-mail client to access e-mail on a remote mail server. The current version, IMAP version 4 revision 1 (IMAP4rev1), is defined by RFC 3501. An IMAP server typically listens on well-known port 143

• Question 774:

  A network administrator must ensure that both the server and the client are authenticated to the wireless system before access is granted. Which of the following should be implemented to meet this requirement?

  A. EAP-PEAP
  B. MAC ACL
  C. EAP-TTLS
  D. MS-CHAPv2
  C. EAP-TTLS

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  Extensible Authentication Protocol, or EAP, is an authentication framework frequently used in wireless networks and Point-to-Point connections. EAP is an authentication framework providing for the transport and usage of keying material and parameters generated by EAP methods.

• Question 775:

  A customer has requested that a new piece of network equipment be installed so that the customer can have multiple subnets for each department, but allow network traffic from each department to reach one another without the use of a router. Which of the following network devices would satisfy this customer's requirements?

  A. Packet filter
  B. Layer 3 switch
  C. Stateful firewall
  D. Wireless bridge
  B. Layer 3 switch

• Question 776:

  Which of the following would be used to run an instance of a Layer 2 device within an application?

  A. Virtual switch
  B. Virtual router
  C. Virtual PBX
  D. NaaS
  A. Virtual switch

• Question 777:

  An IT manager is looking for a solution that can easily trace back suspicious Internet browsing to particular users at a company. Which of the following can BEST provide this functionality?

  A. Layer 3 managed switch
  B. VPN concentrator
  C. Load balancer
  D. Content filter
  D. Content filter

• Question 778:

  A company is connected to an ISP, but owns the premise router with an internal CSU/DSU. Which of the following is considered the demarc?

  A. Premise router
  B. ISP router
  C. Smart jack
  D. CSU/DSU
  C. Smart jack

• Question 779:

  Which of the following requires congestion to occur before enabling traffic prioritization?

  A. Quality of Service
  B. IGMP snooping
  C. Flow control
  D. WAN optimization
  A. Quality of Service

• Question 780:

  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.