CompTIA JK0-023 Online Practice Questions and Exam Preparation

CompTIA JK0-023 Online Questions & Answers

• Question 1:

  A technician installs a new CAT6 cable from one end of the ofce building to anotherf a total distance of 600 feet (182.88 meters). When a laptop is connected to the cablef it cannot connect to the Internet. Which of the following is MOST likely the cause of this problem?

  A. Bad connectors
  B. Crosstalk
  C. DB loss
  D. TXRX reversed
  C. DB loss

• Question 2:

  The MAC address of a network device is used to communicate at which of the following OSI layers?

  A. Layer 1
  B. Layer 2
  C. Layer 4
  D. Layer 5
  B. Layer 2

• Question 3:

  A technician is installing an 802.11n network. The technician is using a laptop that can connect at a maximum speed of 11 Mbps. The technician has confgured the 802.11n network correctly but thinks it could be the type of WLAN card used on the laptop. Which of the following wireless standards is the WLAN card MOST likely using?

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

• Question 4:

  A userns network connecton is slow. Afer testng the cablingf the cable tester shows that only pins 1f 2f 3 and 6 are being used. Afer accurately terminatng both endsf the tester displays the same results. Which of the following is the MOST likely cause?

  A. DB loss on the cable
  B. Interference
  C. Split cable
  D. Distance limitatons
  C. Split cable

• Question 5:

  A network technician is trying to run a protocol analyier and is instructed to record the chimney ofoad state of TCP. Which of the following utlites did the technician use to check this parameter with the output listed below?

  Querying actve state...

  TCP Global Parameters

  Receive-Side Scaling State : enabled Chimney Ofoad State : disabled Receive Window Auto-Tuning Level : normal Add-On Congeston Control Provider : ctcp ECN Capability : disabled RFC 1323 Timestamps : disabled

  A. net
  B. netstat
  C. nbtstat
  D. netsh
  D. netsh

• Question 6:

  Which of the following can be used to prioritie network streams to optmiie performance for certain trafc types?

  A. VLAN
  B. VPN
  C. QoS
  D. PoE
  C. QoS

• Question 7:

  A technician needs to verify an Ethernet run is functoning properly. Which of the following tools should be used?

  A. Protocol analyier
  B. Crimper
  C. Cable tester
  D. Punch down tool
  C. Cable tester

• Question 8:

  A company recently added an additon to their ofce building. A technician runs new plenum network cables from the switch on one side of the company's gymnasium 80 meters (262 f.) to the new ofces on the other sidef draping the wires across the light fxtures. Users working out of the new ofces in the additon complain of intermitent network connectvity. Which of the following is MOST likely the cause of the connectvity issue?

  A. dB loss
  B. Distance
  C. Incorrect connector type
  D. EMI
  E. Crosstalk
  D. EMI

• Question 9:

  Which of the following wireless standards provide speeds up to 150Mbps?

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

• Question 10:

  A technician receives a work order that a user can no longer access any external websites. The user is the only one afectedf but can stll access websites by IP address. Which of the following is the MOST likely cause?

  A. The workstaton has been removed from the domain and needs to be re-added in directory services.
  B. The workstaton is confgured to use the IPv4 protocol instead of IPv6.
  C. The workstaton is confgured with an incorrect IP address of the DNS server.
  D. The workstatonns DHCP IP address has expired and has assigned itself an APIPA address.
  C. The workstaton is confgured with an incorrect IP address of the DNS server.