CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 281:

  When a loop occurs, which of the following STP components determines which port to disable?

  A. Convergence
  B. Root bridge
  C. BPDU guard
  D. MAC address
  B. Root bridge

• Question 282:

  Which of the following cable types is required to run through an air duct?

  A. UTP
  B. Fiber
  C. PVC
  D. Plenum
  D. Plenum

  ---

  Plenum rated cable has a special insulation that has low smoke and low flame characteristics. Plenum cable is mandated to be installed in any "air handling" space. For example, most large office buildings use the ceiling to return air to the AC unit. This qualifies this ceiling as a plenum ceiling, and all the cables that go through that ceiling must be plenum rated.

• Question 283:

  Which of the following technologies prevents network collisions to maximize safe delivery of network data?

  A. CSMA/CA
  B. DWDM
  C. RADIUS
  D. SONET
  A. CSMA/CA

• Question 284:

  Which of the following connector types would be found with a VoIP system utilizing CAT6 cabling?

  A. SC
  B. RJ-45
  C. RJ-11
  D. BNC
  B. RJ-45

  ---

  The heavier wire in some Cat 6 cables makes them too thick to attach to standard 8P8C (RJ-45) connectors without a special modular piece

• Question 285:

  An administrator is trying to retrieve management information from the network devices on their LAN. Which of the following monitoring resources provides the ability to collect this information encrypted over the network?

  A. SNMPv3 B. VTP
  C. CDP
  D. IPSec
  A. SNMPv3 B. VTP

• Question 286:

  A user moves from one office to another. When the user logs onto their computer, it has local access to shared drives but no Internet access. A technician determines that the computer has an IP address in the wrong subnet. Which of the following is MOST likely the cause?

  A. Incorrect VLAN
  B. MTU mismatch
  C. Hijacked HOSTS file
  D. Missing routes
  A. Incorrect VLAN

• Question 287:

  A SOHO company just installed new 802.11a wireless APs. All company laptops have gigabit LAN ports along with wireless-g cards. Which of the following is the issue with this setup?

  A. The laptops will have a max wireless speed of 300Mbps
  B. The wired network is likely not backwards compatible with the gigabit LAN ports on the laptops
  C. The wireless system will only function at a slow 11Mbps
  D. The laptops are only capable of functioning on 2.4GHz spectrum
  D. The laptops are only capable of functioning on 2.4GHz spectrum

• Question 288:

  Several users are reporting connectivity issues with their laptops. Upon further investigation, the network technician identifies that their laptops have been attacked from a specific IP address outside of the network. Which of the following would need to be configured to prevent any further attacks from that IP address?

  A. Port security
  B. IDS
  C. Firewall rules
  D. Switch VLAN assignments
  C. Firewall rules

  ---

  Firewall rules block or allow specific traffic passing through from one side of the router to the other. Inbound rules (WAN to LAN) restrict access by outsiders to private resources, selectively allowing only specific outside users to access specific resources. Outbound rules (LAN to WAN) determine what outside resources local users can have access to.

• Question 289:

  The security administrator needs to restrict specific devices from connecting to certain WAPs. Which of the following security measures would BEST fulfill this need?

  A. WAP placement
  B. MAC address filtering
  C. Content filtering
  D. Encryption type and strength
  B. MAC address filtering

  ---

  MAC Filtering (or EUI filtering, or layer 2 address filtering) is a security access control method whereby the 48-bit address assigned to each network card is used to determine access to the network.

• Question 290:

  An administrator would like to get more speed out of a wireless network. The administrator decides to configure the AP with a frequency width of 40MHz. Which of the following features is the administrator MOST likely using?

  A. MIMO
  B. AP isolation
  C. Channel bonding
  D. Burst mode
  C. Channel bonding