CompTIA CompTIA Certifications N10-008 Questions & Answers

• Question 631:

  Which of the following uses the link-state routing algorithm and operates within a single autonomous system?

  A. EIGRP

  B. OSPF

  C. RIP

  D. BGP

  Correct Answer: B

  OSPF uses a link state routing algorithm and falls into the group of interior routing protocols, operating within a single autonomous system (AS). OSPF is perhaps the most widely used interior gateway protocol (IGP) in large enterprise networks

• Question 632:

  A network administrator is setting up a new phone system and needs to define the location where VoIP phones can download configuration files. Which of the following DHCP services can be used to accomplish this task?

  A. Scope options

  B. Exclusion ranges

  C. Lease time

  D. Relay

  Correct Answer: A

  A DHCP scope option can be used to specify the location of configuration files for VoIP phones, by including the address of the file server as an option in the DHCP scope. The DHCP server can then provide this information to the VoIP phones when they request an IP address, so that they know where to download the configuration files from. This allows the administrator to centrally manage the configuration of the phones, rather than having to manually configure each one.

• Question 633:

  While setting up a new workstation, a technician discovers that the network connection is only 100 full duplex (FD), although it is connected to a gigabit switch.

  While reviewing the interface information in the switch CLI, the technician notes the port is operating at IOOFD but Shows many RX and TX errors. The technician moves the computer to another switchport and experiences the same issues.

  Which of the following is MOST likely the cause of the low data rate and port errors?

  A. Bad switch ports

  B. Duplex issues

  C. Cable length

  D. Incorrect pinout

  Correct Answer: D

• Question 634:

  Which of the following records can be used to track the number of changes on a DNS zone?

  A.SOA

  B. SRV

  C. PTR

  D. NS

  Correct Answer: A

  The DNS `start of authority' (SOA) record stores important information about a domain or zone such as the email address of the administrator, when the domain was last updated, and how long the server should wait between refreshes. All DNS zones need an SOA record in order to conform to IETF standards. SOA records are also important for zone transfers.

• Question 635:

  A network administrator needs to configure a server to use the most accurate NTP reference available. Which of the following NTP devices should the administrator select?

  A. Stratum 1

  B. Stratum 2

  C. Stratum 3

  D. Stratum 4

  Correct Answer: A

  NTP (Network Time Protocol) servers are organized into a hierarchy known as strata. Stratum 1 servers are the most accurate and are typically connected directly to a highly accurate reference time source, such as an atomic clock. Stratum 2 servers are connected to stratum 1 servers and are slightly less accurate than stratum 1 servers. Stratum 3 servers are connected to stratum 2 servers and are slightly less accurate than stratum 2 servers, and so on.

  In order to use the most accurate NTP reference available, the administrator should configure the server to use a stratum 1 NTP server.

• Question 636:

  A new student is given credentials to log on to the campus Wi-Fi. The student stores the password in a laptop and is able to connect; however, the student is not able to connect with a phone when only a short distance from the laptop. Given the following information:

  

  Which of the following is MOST likely causing this connection failure?

  A. Transmission speed

  B. Incorrect passphrase

  C. Channel overlap

  D. Antenna cable attenuation/signal loss

  Correct Answer: B

• Question 637:

  Which of the Mowing architectures reduces network latency by enforcing a limit on the number of switching devices on the frame's path between any internal hosts?

  A. Spine and leaf

  B. Software-defined network

  C. Three-tiered

  D. Collapsed core

  Correct Answer: A

  It does this by using a two-level hierarchy of switches, where the spine switches connect to the leaf switches, which in turn connect to the end hosts. This reduces the number of hops a packet must take from one host to another, thus reducing latency. According to the CompTIA Network+ N10-008 uide, the Spine and Leaf topology is a modern architecture that is used to reduce latency in large networks.

• Question 638:

  A Fortune 500 firm is deciding on the kind of data center equipment to install given its five-year budget outlook. The Chief Information Officer is comparing equipment based on the life expectancy of different models. Which of the following concepts BEST represents this metric?

  A. MTBF

  B. MTRR

  C. RPO

  D. RTO

  Correct Answer: A

  Mean Time Between Failures (MTBF) represents the life expectancy of equipment, it is a metric that predicts the time interval between two failure events of a device. It is typically measured in hours and it is used to predict the reliability of a device over time. MTTR (Mean Time To Recovery), RPO (Recovery Point Objective), and RTO (Recovery Time Objective) are related to disaster recovery and business continuity, they don't represent the life expectancy of equipment. MTTR is the average time to repair a failed component, RPO is the maximum acceptable period in which data might be lost from an IT service due to a major incident, and RTO is the target time within which an IT service should be restored after a disaster or disruption.

• Question 639:

  Which of the following would be increased by adding encryption to data communication across the network?

  A. Availability

  B. Integrity

  C. Accountability

  D. Confidentiality

  Correct Answer: D

  Encryption Increases the Integrity of Our Data

  This will prevent hackers from intercepting communications and tampering with the data.

  Encryption can help prevent data breaches during transfer and storage. If an employee loses a company device like a phone or laptop, encrypted data may still be secure. Encrypted communication lines can allow sensitive data to transfer without risk toward a security breach.

• Question 640:

  A network technician is troubleshooting an area where the wireless connection to devices is poor. The technician theorizes that the signal-to-noise ratio in the area is causing the issue. Which of the following should the technician do NEXT?

  A. Run diagnostics on the relevant devices.

  B. Move the access point to a different location.

  C. Escalate the issue to the vendor's support team.

  D. Remove any electronics that might be causing interference.

  Correct Answer: D