CompTIA JK0-019 Online Practice Questions and Exam Preparation

CompTIA JK0-019 Online Questions & Answers

• Question 101:

  Which of the following wireless standards is the only one capable of operating in any of the 802.11 wireless spectrums?

  A. A
  B. B
  C. G
  D. N
  D. N

• Question 102:

  Which of the following would be used to place extranet servers in a separate subnet for security purposes?

  A. VPN
  B. NAT
  C. DMZ
  D. IDS
  C. DMZ

• Question 103:

  Which of the following protocols could the below packet capture be from? Port: 161

  msgVersion:

  msgUsername:

  msgAuthenticationParameters:

  msgPrivacyParameters:

  msgData:

  data: get-request

  request-iD.

  error-status: noError (0)

  error-index: 0

  variable-bindings: 0 items

  A. SNMPv3
  B. SSH
  C. HTTP
  D. SNMPv1
  A. SNMPv3

• Question 104:

  A technician is upgrading the wiring in an older office building. The building currently contains some CAT3, CAT5, and CAT6 cables. The technician cannot visually distinguish between the cables because they are all the same color. Which of the following tools would help the technician determine which wires are the CAT3 and CAT5 cables needing to be replaced with CAT6 ones?

  A. Cable certifier
  B. Toner probe
  C. Cable tester
  D. Crimper
  A. Cable certifier

• Question 105:

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

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

  ---

  Port no. 25 is assigned to smtp as documented by iana.

• Question 106:

  Spanning-Tree Protocol is used with which of the following network devices?

  A. Router
  B. NIC
  C. Switch
  D. DHCP server
  C. Switch

  ---

  Spanning Tree Protocol (STP) is a Layer 2 protocol that runs on bridges and switches. The specification for STP is IEEE 802.1D. The main purpose of STP is to ensure that you do not create loops when you have redundant paths in your network. Loops are deadly to a network.

• Question 107:

  Which of the following types of connectors is used with a CAT6 Ethernet cable?

  A. RJ-45
  B. BNC
  C. RJ-11
  D. DB-9
  A. RJ-45

• Question 108:

  Which of the following wireless technologies only uses the 5GHz spectrum but reaches a theoretical throughput of only 54Mbps?

  A. A
  B. B
  C. G
  D. N
  A. A

  ---

  802.11a standard uses the same core protocol as the original standard, operates in 5 GHz band, and uses a 52-subcarrier orthogonal frequency-division multiplexing (OFDM) with a maximum raw data rate of 54 Mbit/s, which yields realistic net achievable throughput in the mid-20 Mbit/s. The data rate is reduced to 48, 36, 24, 18, 12, 9 then 6 Mbit/s if required.

• Question 109:

  Which of the following protocols would the network administrator use to protect login credentials when accessing a router terminal session?

  A. SCP
  B. SNMPv3
  C. SSL
  D. SSH
  D. SSH

• Question 110:

  Which of the following network appliances will only detect and not prevent malicious network activity?

  A. IDS
  B. Network sniffer
  C. IPS
  D. Firewall
  A. IDS

  ---

  An intrusion detection system (IDS) is a device or software application that monitors network or system activities for malicious activities or policy violations and produces reports to a management station. Some systems may attempt to stop an intrusion attempt but this is neither required nor expected of a monitoring system.