CompTIA CompTIA Network+ N10-008 Questions & Answers

• Question 901:

  Which of the following provides redundancy on a file server to ensure the server is still connected to a LAN even in the event of a port failure on a switch?

  A. NIC teaming

  B. Load balancer

  C. RAID array

  D. PDUs

  Correct Answer: A

• Question 902:

  A technician is searching for a device that is connected to the network and has the device's physical network address. Which of the following should the technician review on the switch to locate the device's network port?

  A. IP route table

  B. VLAN tag

  C. MAC table

  D. QoS tag

  Correct Answer: C

  MAC table (Media Access Control table) is a table that maps MAC addresses to switch ports. When a packet is received by a switch, it examines the source MAC address and adds an entry to the MAC table that maps the MAC address to the port on which the packet was received. By reviewing the MAC table, the technician can determine which switch port is associated with the device's physical network address.

• Question 903:

  A technician is installing a new fiber connection to a network device in a datacenter. The connection from the device to the switch also traverses a patch panel connection. The chain of connections is in the following order:

  1.

  Device

  2.

  LC/LC patch cable

  3.

  Patch panel

  4.

  Cross-connect fiber cable

  5.

  Patch panel

  6.

  LC/LC patch cable

  7.

  Switch

  The connection is not working. The technician has changed both patch cables with known working patch cables. The device had been tested and was working properly before being installed. Which of the following is the MOST likely cause of the issue?

  A. TX/RX is reversed

  B. An incorrect cable was used

  C. The device failed during installation

  D. Attenuation is occurring

  Correct Answer: A

  TX/RX is reversed since it makes the sense to me given the other options:

  If the TX (transmit) and RX (receive) fibers are reversed in either of the LC/LC patch cables or the cross-connect fiber cable, the data will not be transmitted and received correctly, resulting in a connection failure. Also, I think the question listed the order of the connections and multiple patch panels to suggest that there was good chance of some kind of misalignment going on when the fibers were installed.

• Question 904:

  A company built a new building at its headquarters location. The new building is connected to the company's LAN via fiber-optic cable. Multiple users in the new building are unable to access the company's intranet site via their web browser, but they are able to access internet sites. Which of the following describes how the network administrator can resolve this issue?

  A. Correct the DNS server entries in the DHCP scope

  B. Correct the external firewall gateway address

  C. Correct the NTP server settings on the clients

  D. Correct a TFTP Issue on the company's server

  Correct Answer: A

  Different building means different subnet. This means DHCP is being used which gives out DNS. You usually have multiple DNS servers in your lease. Regular internet means the external DNS works, and internal failing means the DNS server for inside the network was not given out correctly.

• Question 905:

  Which of the following DNS records works as an alias to another record?

  A. AAAA

  B. CNAME

  C. MX

  D. SOA

  Correct Answer: B

  AAAA record is used to find the IP address of a computer connected to the internet from a name.

  CNAME record is a type of DNS record that maps an alias name to a true or canonical domain name.MX record specifies the mail server responsible for accepting email messages on behalf of a domain name.

  SOA record is a type of resource record in the DNS containing administrative information about the zone.

• Question 906:

  An administrator is writing a script to periodically log the IPv6 and MAC addresses of all the devices on a network segment. Which of the following switch features will MOST likely be used to assist with this task?

  A. Spanning Tree Protocol

  B. Neighbor Discovery Protocol

  C. Link Aggregation Control Protocol

  D. Address Resolution Protocol

  Correct Answer: B

  Neighbor Discovery Protocol is similar to ARP but retrieves the IPV6 address. ARP retrieves IPv4.

• Question 907:

  Client devices cannot enter a network, and the network administrator determines the DHCP scope is exhausted. The administrator wants to avoid creating a new DHCP pool. Which of the following can the administrator perform to resolve the issue?

  A. Install load balancers

  B. Install more switches

  C. Decrease the number of VLANs

  D. Reduce the lease time

  Correct Answer: D

  Reducing the lease time is the best answer here. While there isn't much additional info regarding how long it currently is, if some jabroni configured a lease time of two weeks, there will be a bunch of lingering leases that aren't in use and could be utilized by new devices.

• Question 908:

  A client recently added 100 users who are using VMs. All users have since reported slow or unresponsive desktops. Reports show minimal network congestion, zero packet loss, and acceptable packet delay. Which of the following metrics will MOST accurately show the underlying performance issues? (Choose two.)

  A. CPU usage

  B. Memory

  C. Temperature

  D. Bandwidth

  E. Latency

  F. Jitter

  Correct Answer: AB

  CPU usage and Memory are the two metrics that will most accurately show the underlying performance issues in this scenario. To accurately show the underlying performance issues in this scenario, monitoring the CPU usage and memory will be most helpful. The slow or unresponsive desktops experienced by 100 users suggest a bottleneck on the VM host. Temperature, bandwidth, latency, and jitter are unlikely to be the cause of the problem, based on the reported network metrics.

• Question 909:

  A network is experiencing a number of CRC errors during normal network communication. At which of the following layers of the OSI model will the administrator MOST likely start to troubleshoot?

  A. Layer 1

  B. Layer 2

  C. Layer 3

  D. Layer 4

  E. Layer 5

  F. Layer 6

  G. Layer 7

  Correct Answer: A

  CRC (Cyclic Redundancy Check) errors are often indicative of problems at the physical layer of communication because they often result from issues like interference, signal attenuation, or poor-quality cables. The physical layer corresponds to Layer 1 of the OSI model.

• Question 910:

  A network administrator walks into a datacenter and notices an unknown person is following closely. The administrator stops and directs the person to the security desk. Which of the following attacks did the network administrator prevent?

  A. Evil twin

  B. Tailgating

  C. Piggybacking

  D. Shoulder surfing

  Correct Answer: B