CompTIA JK0-023 Online Practice Questions and Exam Preparation

CompTIA JK0-023 Online Questions & Answers

• Question 561:

  Zachf an administratorf wants to eliminate remote access to a network from all usersf except those users in Zachns own country. Which of the following security measures could he use to set up this functonality?

  A. MAC fltering
  B. Port fltering
  C. IP fltering
  D. TLS
  C. IP fltering

• Question 562:

  Which of the following is used by RADIUS to encrypt messages between the server and the client?

  A. Public key
  B. CSU/DSU
  C. Private key
  D. Shared secret
  D. Shared secret

• Question 563:

  Which of the following wireless standards has a MAXIMUM transfer rate of 11Mbps?

  A. 802.11a
  B. 802.11b
  C. 802.11g
  D. 802.11n
  B. 802.11b

• Question 564:

  Users are reportng that all of a sudden some of the fles stored on the remote fle server share are becoming corrupted and cannot be opened. A technician is dispatched to the server room to troubleshoot. The technician verifes that no changes to the network infrastructure occurred recently. Which of the following tools is MOST likely to reveal why fles are becoming corrupted?

  A. Environmental monitor
  B. OTDR
  C. Cable tester
  D. Punch down tool
  A. Environmental monitor

• Question 565:

  Which of the following ports is used by Telnet?

  A. 21
  B. 23
  C. 80
  D. 143
  B. 23

• Question 566:

  Which of the following network performance methods would Lisaf a technicianf use with SIP phones?

  A. CARP
  B. Load balancing
  C. QoS
  D. Caching engines
  C. QoS

• Question 567:

  A technician needs multple networksf high speedsf and redundancy on a system. Which of the following confguratons should be considered for these requirements? (Select TWO).

  A. Routng table
  B. Next hop
  C. Port mirroring
  D. Port monitoring
  E. VLANs
  C. Port mirroring
  E. VLANs

• Question 568:

  Which of the following DNS records is used to identfy a domainns SMTP server?

  A. CNAME
  B. PTR
  C. MX
  D. A
  C. MX

• Question 569:

  Various desktop computers are not getng a link light even though the patch cables were replaced. Cables on a 110-block patch panel are suspected to be causing the issues. Which of the following hardware tools would MOST likely be used to troubleshoot and resolve the issue? (Select TWO).

  A. Cable certfer
  B. Ping command
  C. Punch down tool
  D. Crimper
  E. Toner probe
  A. Cable certfer
  C. Punch down tool

• Question 570:

  Sandyf a network technicianf has implemented DHCP on the network last week. Employees are now reportng duplicate IP addresses and network connectvity errors. Which of the following would cause duplicate IP addresses on the network?

  A. A second DHCP server is on the network.
  B. The network IP leases are expiring and not renewing.
  C. The DNS record A pointers are incorrect.
  D. The DHCP server has run out of IP addresses to issue to clients.
  A. A second DHCP server is on the network.