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Question 1:
A network technician wants to ensure the backup configuration files for the network devices are not being altered after they are stored. Which of the following tasks should the network technician perform to achieve this goal?
A. Compute the checksum of the backup file and document it separately.
B. Store the backup files on a thumb drive and keep it in a desk drawer.
C. Encrypt the drive the files are stored on using AES-256.
D. Upload the backup files to a cloud storage service.
Correct Answer: A
Question 2:
Which of the following technologies is used to translate one public IP address to multiple private IP addresses?
A. NAT
B. ARP
C. DHCP
D. DNS
Correct Answer: A
Question 3:
A non-employee was able to enter a server room. Which of the following could have prevented this from happening?
A. A security camera
B. A biometric reader
C. OTP key fob
D. Employee training
Correct Answer: B
Question 4:
An administrator is setting up a multicast server on a network, but the firewall seems to be dropping the traffic. After logging in to the device, me administrator sees me following entries: Which of the following firewall rules is MOST likely causing the issue?
A. Rule 1
B. Rule 2
C. Rule 3
D. Rule 4
Correct Answer: B
Question 5:
A technician is configuring a network switch to be used in a publicly accessible location. Which of the following should the technician configure on the switch to prevent unintended connections?
A. DHCP snooping
B. Geofencing
C. Port security
D. Secure SNMP
Correct Answer: C
Port security is pretty obvious. The key word here is: “switch”
Question 6:
A technician needs to map the path of a PC to the router. Which of the following tools should the technician use to accomplish this task?
A. traceroute
B. ping
C. ifconfig
D. netstat
Correct Answer: A
Question 7:
A technician is writing documentation regarding a company\’s server farm. The technician needs to confirm the server name for all Linux servers. Which of the following commands should the technician run?
A. ipconfig
B. nslookup
C. arp
D. route
Correct Answer: B
Nslookup (stands for “Name Server Lookup”) is a useful command for getting information from the DNS server. It is a network administration tool for querying the Domain Name System (DNS) to obtain domain name or IP address mapping or any other specific DNS record. It is also used to troubleshoot DNS-related problems.
Question 8:
A network technician configures a firewall to block only certain IP addresses from accessing the Internet.
All users are reporting that they are unable to access the Internet.
Which of the following is the MOST likely reason?
A. Incorrectly configured ACL
B. Implicit allow statement
C. SMTP requests are being denied
D. All protocols are being allowed in
Correct Answer: A
Question 9:
A store owner would like to have secure wireless access available for both business equipment and patron use. Which of the following features should be configured to allow different wireless access through the same equipment?
A. MIMO
B. TKIP
C. LTE
D. SSID
Correct Answer: D
The feature that should be configured to allow different wireless access through the same equipment is SSID (Service Set Identifier). SSID is a unique identifier that allows wireless devices to connect to a wireless network. By configuring multiple SSIDs, the store owner can provide separate wireless access for business equipment and patron use, while using the same wireless access points
Question 10:
A network engineer is investigating reports of poor performance on a videoconferencing application. Upon reviewing the report, the engineer finds that available bandwidth at the WAN connection is low. Which of the following is the MOST appropriate mechanism to handle this issue?
A. Traffic shaping
B. Flow control
C. NetFlow
D. Link aggregation
Correct Answer: A
Traffic shaping is a network management technique that controls the flow of network traffic to ensure that certain types of traffic are given higher priority over others. In this case, by implementing traffic shaping, the network engineer can prioritize and allocate sufficient bandwidth for the videoconferencing application to ensure its performance and quality.
Question 11:
Which of the following is MOST likely to generate significant East-West traffic in a datacenter?
A. A backup of a large video presentation to cloud storage for archival purposes
B. A duplication of a hosted virtual server to another physical server for redundancy
C. A download of navigation data to a portable device for offline access
D. A query from an IoT device to a cloud-hosted server for a firmware update
Correct Answer: B
East-west traffic, in a networking context, is the transfer of data packets from server to server within a data center. The term east-west for this type of traffic comes from network diagram drawings that usually depict local area network (LAN) traffic horizontally
Question 12:
A technician is installing a high-density wireless network and wants to use an available frequency that supports the maximum number of channels to reduce interference. Which of the following standard 802.11 frequency ranges should the technician look for while reviewing WAP specifications?
A. 2.4GHz
B. 5GHz
C. 6GHz
D. 900MHz
Correct Answer: B
5GHz is the frequency range that supports the maximum number of channels and reduces interference in a high-density wireless network. The 802.11 standard for this range offers more non-overlapping channels, which reduces the likelihood of interference with other devices and improves overall network performance.
Question 13:
A network administrator wants to improve the security of the management console on the company\’s switches and ensure configuration changes made can be correlated to the administrator who conformed them. Which of the following should the network administrator implement?
A. Port security
B. Local authentication
C. TACACS+
D. Access control list
Correct Answer: C
TACACS+ is a protocol that provides centralized authentication, authorization, and accounting (AAA) for network devices and users. TACACS+ can help improve the security of the management console on the company\’s switches by verifying the identity and credentials of the administrators, enforcing granular access policies and permissions, and logging the configuration changes made by each administrator. This way, the network administrator can ensure only authorized and authenticated users can access and modify the switch settings, and also track and correlate the changes made by each user. References: https://www.comptia.org/blog/what-is-tacacs
Question 14:
Which of the following can be used to centrally manage credentials for various types of administrative privileges on configured network devices?
A. SSO
B. TACACS+
C. Zero Trust
D. Separation of duties
E. Multifactor authentication
Correct Answer: B
TACACS+ is used to authenticate users and authorize access to network resources. This protocol provides greater network security by encrypting the authentication credentials and reducing the risk of unauthorized access. According to the CompTIA Network+ Study Manual, “TACACS+ is an authentication protocol used to centralize authentication and authorization for network devices. It is a more secure alternative to Telnet for handling logins and for granting privileges to users.”
Question 15:
A network technician needs to ensure the company\’s external mail server can pass reverse lookup checks.
Which of the following records would the technician MOST likely configure? (Choose Correct option and give explanation directly from CompTIA Network+ Study guide or documents)
A. PTR
B. AAAA
C. SPF
D. CNAME
Correct Answer: A
A PTR (Pointer) record is used to map an IP address to a domain name, which is necessary for reverse lookup checks. Reverse lookup checks are performed by external mail servers to verify the identity of the sender of the email. By configuring a PTR record, the network technician can ensure that the company\’s external mail server can pass these checks. According to the CompTIA Network+ Study Guide, “A PTR record is used to map an IP address to a domain name, and it is often used for email authentication.”