CompTIA JK0-023 Online Practice Questions and Exam Preparation

CompTIA JK0-023 Online Questions & Answers

• Question 481:

  An administrator is using a packet snifer to try to determine what is causing the trafc on the network. The administrator sees a lot of packets on port 25. Which of the following trafc types is MOST likely using port 25?

  A. SMTP
  B. SSH
  C. DNS
  D. TELNET
  A. SMTP

• Question 482:

  The TCP/IP applicaton layer contains which of the following OSI layers?

  A. Layers 1f5f6f7
  B. Layers 4f7
  C. Layers 5f6f7
  D. Layer 7
  C. Layers 5f6f7

• Question 483:

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

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

• Question 484:

  Zachf a technicianf is installing an 802.11n network. Which of the following should he disable to stop broadcastng the network name?

  A. Channel
  B. WEP
  C. SSID
  D. WPA
  C. SSID

• Question 485:

  Which of the following can be confgured to restrict specifc ports and IP addresses from accessing the internal network? (Select TWO).

  A. Layer 2 switch
  B. MAC address fltering
  C. ACLs
  D. IIS server
  E. Port scanner
  F. Firewall
  C. ACLs
  F. Firewall

• Question 486:

  A company needs to fnd a way to best route latency-sensitve trafc appropriately on an already congested network. Which of the following would be BEST suited for this purpose?

  A. QoS
  B. PPPoE
  C. RADIUS
  D. VPN
  A. QoS

• Question 487:

  A technician replaces a failed router in an ofce with the same model unit using the default setngs. Afer the installatonf the technician reboots all of the PCs and servers. Upon reboot some of the PCs are receiving IP addresses on the same subnet as the new router; other PCs are receiving addresses on the same subnet as the servers. Which of the following most likely describes the issue?

  A. The DHCP lease pool was not large enough
  B. DHCP lease tmes were set too low
  C. The router is not the only DHCP server
  D. DHCP was not enabled on the replacement router
  C. The router is not the only DHCP server

• Question 488:

  When installing new WAPs in a small ofcef which of the following is the BEST way to physically mitgate the threats from war driving?

  A. Implement multple wireless encrypton techniques.
  B. Implement PoE on each WAP.
  C. Decrease signal strength.
  D. Increase signal strength.
  C. Decrease signal strength.

• Question 489:

  A forward lookup ione converts which of the following?

  A. IP addresses to hostnames
  B. Hostnames to IP addresses
  C. MAC addresses to IP addresses
  D. IP Addresses to MAC addresses
  B. Hostnames to IP addresses

• Question 490:

  Kurtf a userf is unable to print to a network. The cable tests good and the correct VLAN is confgured on the switch. Which of the following is MOST likely the cause?

  A. The printer was confgured for DHCP.
  B. The switch was confgured for trunking.
  C. The printer was confgured for duplexing.
  D. The switch was confgured for PoE.
  A. The printer was confgured for DHCP.