N10-009 Free Practice Test

- (Topic 2)
Which of the following would be used to expedite MX record updates to authoritative NSs?

1. A. UDP forwarding
2. B. DNS caching
3. C. Recursive lookup
4. D. Time to live

Correct Answer: D
Time to live (TTL) is a value that indicates how long a DNS record can be cached by authoritative NSs (name servers) or other DNS servers before it expires and needs to be updated. A lower TTL value would expedite MX record updates to authoritative NSs, as they would refresh the record more frequently. UDP forwarding is not a DNS term, but a technique of sending UDP packets from one host to another. DNS caching is the process of storing DNS records locally for faster resolution, which does not expedite MX record updates. Recursive lookup is a type of DNS query where a DNS server queries other DNS servers on behalf of a client until it finds the answer, which does not expedite MX record updates.

- (Topic 3)
Which of the following would MOST likely be used to review disaster recovery information for a system?

1. A. Business continuity plan
2. B. System life cycle
3. C. Change management
4. D. Standard operating procedures

Correct Answer: A
The document that would most likely be used to review disaster recovery information for a system is a business continuity plan (BCP). A BCP is a document that outlines the procedures and resources needed to maintain or resume critical business functions in the event of a disaster or disruption. A BCP typically includes a disaster recovery plan (DRP), which is a subset of the BCP that focuses on restoring IT systems and data after a disaster. A BCP also covers other aspects of business continuity, such as risk assessment, business impact analysis, emergency response, crisis management, and
testing. References: CompTIA Network+ N10-008 Certification Study Guide, page 346; The Official CompTIA Network+ Student Guide (Exam N10-008), page 13-9.

- (Topic 3)
A technician is troubleshooting intermittent connectivity between devices and viewing the following syslog entries from a switch:

Which of the following are these entries indicative of?

1. A. DDoS attack
2. B. Jitter
3. C. Latency
4. D. Link flapping

Correct Answer: D
The syslog entries are indicative of link flapping, which is when a switch port rapidly transitions between the up and down states. This can cause intermittent connectivity issues, network instability, and increased CPU utilization on the switch. Link flapping can be caused by various factors, such as faulty cables, misconfigured interfaces, duplex mismatches, or network attacks. To troubleshoot link flapping, the technician should check the physical layer, verify the interface settings, and monitor the network traffic for
anomalies. References:
✑ What is Link Flapping? - CompTIA1
✑ Troubleshooting Switch Port and Interface Problems - Cisco2
✑ Network Troubleshooting - N10-008 CompTIA Network+ : 4.1 - YouTube3

- (Topic 3)
A network administrator would like to purchase a device that provides access ports to endpoints and has the ability to route between networks. Which of the following would be BEST for the administrator to purchase?

1. A. An IPS
2. B. A Layer 3 switch
3. C. A router
4. D. A wireless LAN controller

Correct Answer: B

SIMULATION - (Topic 1)
SIMULATION
You have been tasked with setting up a wireless network in an office. The network will consist of 3 Access Points and a single switch. The network must meet the following parameters:
The SSIDs need to be configured as CorpNet with a key of S3cr3t! The wireless signals should not interfere with each other
The subnet the Access Points and switch are on should only support 30 devices maximum The Access Points should be configured to only support TKIP clients at a maximum speed INSTRUCTONS
Click on the wireless devices and review their information and adjust the settings of the access points to meet the given requirements.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.




Solution:
On the first exhibit, the layout should be as follows


Graphical user interface, text, application, chat or text message Description automatically generated
Description automatically generated

Graphical user interface
Description automatically generated

Graphical user interface, text, application, chat or text message
Description automatically generated

Graphical user interface
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Exhibit 2 as follows
Access Point Name AP2

Graphical user interface
Description automatically generated

Graphical user interface, text, application, chat or text message
Description automatically generated

Graphical user interface
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Exhibit 3 as follows
Access Point Name AP3

Graphical user interface
Description automatically generated

Graphical user interface, text, application, chat or text message
Description automatically generated

Graphical user interface
Description automatically generated

Does this meet the goal?

1. A. Yes
2. B. No

Correct Answer: A