CompTIA CompTIA Certifications N10-008 Questions & Answers

• Question 161:

  A network technician crimped a length of UTP with TIA\EIA-568A on one end and TIA\EIA-568B on the other. Which of the following cable types did the technician create?

  A. Crossover cable

  B. Patch cable

  C. Twinaxial cable

  D. Rollover cable

  Correct Answer: A

  When a network technician crimps a length of UTP (Unshielded Twisted Pair) cable with TIA/EIA-568A on one end and TIA/EIA-568B on the other, they have created a crossover cable. A crossover cable is used to connect similar devices directly, such as connecting two computers or two switches without the need for a crossover port on a hub or switch

• Question 162:

  Which of the following layers of the OSI model is responsible for end-to-end encryption?

  A. Presentation

  B. Application

  C. Session

  D. Transport

  Correct Answer: A

  The Presentation layer of the OSI model is primarily responsible for formatting, encrypting, and compressing data in a way that the Application layer can understand. Encryption, as a part of data formatting, is often implemented in this layer to ensure end-to-end secure communication between applications.

  While encryption can also be implemented at other layers of the OSI model, such as the Application layer (for application-specific encryption) and the Transport layer (for transport-level encryption such as SSL/TLS), the Presentation layer specifically deals with the syntax and semantics of the data to be exchanged and is where data encryption/decryption often takes place, allowing for secure communication between applications.

• Question 163:

  Which of the following network topologies contains a direct connection between every node in the network?

  A. Mesh

  B. Hub-and-spoke

  C. Star

  D. Point-to-point

  Correct Answer: A

  Mesh Topology: In a mesh topology, every node is directly connected to every other node in the network. This provides high redundancy and fault tolerance, as communication can take multiple paths. Mesh topologies can be fully meshed (every node connected to every other node) or partially meshed (some nodes have direct connections to all other nodes).

• Question 164:

  A network engineer performed a migration to a new mail server. The engineer changed the MX record, verified the change was accurate, and confirmed the new mail server was reachable via the IP address in the A record. However, users are not receiving email. Which of the following should the engineer have done to prevent the issue from occurring?

  A. Change the email client configuration to match the MX record.

  B. Reduce the TTL record prior to the MX record change.

  C. Perform a DNS zone transfer prior to the MX record change.

  D. Update the NS record to reflect the IP address change.

  Correct Answer: B

  TTL (Time To Live): TTL is a value in a DNS record that determines the amount of time it can be cached by DNS resolvers and other devices on the internet. When making changes to DNS records, reducing the TTL beforehand helps minimize the time it takes for the changes to propagate throughout the internet.

  MX Record Change: Changing the MX (Mail Exchange) record directs email traffic to the specified mail server. However, DNS changes take time to propagate across the internet due to caching. If the TTL is set too high, old records may be cached for an extended period, leading to email delivery issues.

• Question 165:

  A network technician is configuring a wireless network that consists of multiple APs for better coverage and allows roaming between the APs. Which of the following types of SSIDs should the technician configure?

  A. Basic Service Set

  B. Independent Basic Service Set

  C. Extended Service Set

  D. Distribution System Service

  Correct Answer: C

  An Extended Service Set (ESS) is a set of interconnected Basic Service Sets (BSS) within a network. It is a network configuration that allows mobile devices to roam seamlessly between different Access Points (APs) within the same network, providing continuous connectivity as the devices move.

• Question 166:

  A company's VoIP phone connection is cutting in and out. Which of the following should be configured to resolve this issue?

  A. 802.1Q tagging

  B. Jumbo frames

  C. Native VLAN

  D. Link aggregation

  Correct Answer: A

• Question 167:

  Users have reported an issue connecting to a server over the network. A workstation was recently added to the network and configured with a shared USB printer. Which of the following is most likely causing the issue?

  A. The switch is oversubscribed and cannot handle the additional throughput.

  B. The printer is tying up the server with DHCP discover messages.

  C. The web server's back end was designed for only single-threaded applications.

  D. The workstation was configured with a static IP that is the same as the server.

  Correct Answer: D

  If a workstation is configured with a static IP address that is the same as the server's IP address, it can lead to network conflicts and connectivity issues. This is known as an IP address conflict, where two devices on the same network have the same IP address.

• Question 168:

  Which of the following routing protocols uses an autonomous system number?

  A. IS-IS

  B. EIGRP

  C. OSPF

  D. BGP

  Correct Answer: D

  An autonomous system (AS) is a collection of IP networks and routers under the control of a single entity that presents a common routing policy to the internet. BGP (Border Gateway Protocol) is the routing protocol commonly used to exchange routing and reachability information between autonomous systems on the internet. BGP uses an autonomous system number (ASN) to uniquely identify each autonomous system.

• Question 169:

  A network administrator is designing a new network for a company that has frequent power spikes. The company wants to ensure that employees can keep working and the server will remain operational. Which of the following is the best solution for the administrator to recommend?

  A. Generator

  B. Cold site

  C. Redundant power supplies

  D. Uninterruptible power supply

  Correct Answer: D

  To protect against power spikes and ensure continuity of operations during power outages, a UPS (Uninterruptible Power Supply) is the best solution. A UPS provides a temporary power source during electrical failures, allowing systems to shut down gracefully or continue operating for a short duration until power is restored or a generator takes over.

  While a generator (option A) is a solution for longer-term power outages, a UPS is typically used for short-term disruptions and provides immediate protection against power spikes and brief outages.

• Question 170:

  After running a Cat 8 cable using passthrough plugs, an electrician notices that connected cables are experiencing a lot of cross talk. Which of the following troubleshooting steps should the electrician take first?

  A. Inspect the connectors for any wires that are touching or exposed.

  B. Restore default settings on the connected devices.

  C. Terminate the connections again.

  D. Check for radio frequency interference in the area.

  Correct Answer: A

  The electrician should first inspect the connectors for any wires that are touching or exposed. Cross talk issues can occur if there is improper termination, exposed wires, or if wires are not properly separated within the connectors. Checking the connectors for correct wiring and ensuring there is no physical contact between wires is a crucial step in troubleshooting cross talk in a network cable.