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Free CompTIA N10-009 Exam Questions (page: 15)

Page 15 of 104
PDF with 513 Questions

A network administrator is configuring access points for installation in a dense environment where coverage is often overlapping.
Which of the following channel widths should the administrator choose to help minimize interference in the 2.4GHz spectrum?

  1. 11MHz
  2. 20MHz
  3. 40MHz
  4. 80MHz
  5. 160MHz

Answer(s): B

Explanation:

Only 20MHz channels should be used in 2.4GHz deployments, because the band has limited spectrum and only three non-overlapping channels. Wider channels cause severe interference.



A network manager wants to view network traffic for devices connected to a switch. A network engineer connects an appliance to a free port on the switch and needs to configure the switch port connected to the appliance.
Which of the following is the best option for the engineer to enable?

  1. Trunking
  2. Port mirroring
  3. Full duplex
  4. SNMP

Answer(s): B

Explanation:

Port mirroring (SPAN) duplicates traffic from selected ports or VLANs and sends it to a monitoring port for analysis by IDS/IPS or packet analyzers.



A network administrator is in the process of installing 35 PoE security cameras. After the administrator installed and tested the new cables, the administrator installed the cameras. However, a small number of the cameras do not work.
Which of the following is the most likely reason?

  1. Incorrect wiring standard
  2. Power budget exceeded
  3. Signal attenuation
  4. Wrong voltage

Answer(s): B

Explanation:

PoE switches have a fixed power budget. If the total wattage of all connected devices exceeds this limit, additional devices will fail to power up.



A network administrator is troubleshooting an application issue after a firewall change. The administrator has confirmed that the port and protocol are accessible to the user, but the application is still having issues.
Which of the following tools allows the administrator to look at traffic on the application layer of the OSI model?

  1. ifconfig
  2. tcpdump
  3. nslookup
  4. traceroute

Answer(s): B

Explanation:

tcpdump can capture packets including layer 7 (application layer) data. It's used to analyze whether proper traffic is flowing after a firewall rule change.



Which of the following ports should a network administrator enable for encrypted log-in to a network switch?

  1. 22
  2. 23
  3. 80
  4. 123

Answer(s): A

Explanation:

Port 22 is SSH, which provides secure encrypted remote management. Telnet (port 23) is not encrypted.



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