- (Topic 4)
Which of the following delivers internet over a copper medium?
Correct Answer:
C
The correct answer is C. DSL.
DSL stands for Digital Subscriber Line, which is a technology that delivers internet over a copper medium, such as a telephone line. DSL uses different frequencies than voice calls, so it can provide both internet and phone service simultaneously. DSL can offer faster
speeds than dial-up, but it depends on the distance from the service provider and the quality of the copper line .
The other options are not technologies that deliver internet over a copper medium. ONT stands for Optical Network Terminal, which is a device that converts optical signals from a fiber optic cable to electrical signals for a copper cable or a wireless router. ONT is used for fiber-to-the-home (FTTH) internet service, which delivers internet over a fiber optic medium. SDN stands for Software Defined Networking, which is a technology that allows network administrators to manage and control network resources and traffic using software applications. SDN is not related to the physical medium of internet delivery, but rather to the logical layer of network configuration and optimization. WISP stands for Wireless Internet Service Provider, which is a company that delivers internet over a wireless medium, such as radio waves or microwaves. WISP can provide internet access to rural or remote areas where wired connections are not available or feasible.
- (Topic 4)
After a corporate office upgraded its Ethernet wiring, a number of users are unable to access the internet. A technician establishes a theory for troubleshooting the issue and tests it, but the theory is incorrect. Which of the following should the technician do next?
Correct Answer:
B
The correct answer is B. Gather additional details.
According to the CompTIA troubleshooting process for the A+ certification exams1, the technician should gather additional details after testing a theory that is incorrect. This step helps to identify the problem more accurately and establish a new theory of probable cause. The other options are not appropriate for this stage of the troubleshooting process. Documenting the findings, escalating the problem, and identifying user changes are steps that should be done later in the process, after determining the cause and implementing a solution1.
- (Topic 4)
A user's Windows PC is unable to connect to the network at a new branch office that the user is visiting. A technician discovers the PC is unable to ping the local gateway. Which of the following commands should the technician use next?
Correct Answer:
A
ipconfig is a command-line tool that displays the current configuration of the network interfaces on a Windows PC. It can also be used to release and renew the IP address, flush the DNS cache, and display the routing table. If the PC is unable to ping the local gateway, the technician should use ipconfig to check the IP address, subnet mask, default gateway, and DNS servers of the PC. The technician can also use ipconfig /renew to request a new IP address from the DHCP server, or ipconfig /flushdns to clear the DNS cache.
References
•[CompTIA A+ Core 1 (220-1001) Certification Study Guide], page 78
•How to use the ipconfig command on Windows 10
•How to Ping the Windows Network Router
- (Topic 3)
A help desk technician receives a ticket stating a printer has jammed several times today. The technician removes the jammed paper and notices the paper supply is low and the paper in the tray is wrinkled. Which of the following MOST likely caused the paper jams?
Correct Answer:
D
A multipage misfeed is when more than one sheet of paper feeds into the printer at once, causing paper jams or misprints. A multipage misfeed can be caused by low paper supply or wrinkled paper in the tray, as reported by the user in this case. High latency is not related to paper jams, but to network delays or slow performance. Page orientation refers to whether the page is printed in portrait or landscape mode, which does not affect paper jams either. Driver mismatch could cause printing errors or compatibility issues, but not paper jams.
- (Topic 4)
Which of the following translates a hostname to IP addresses?
Correct Answer:
C
DNS stands for Domain Name System, which is a network service that translates hostnames to IP addresses. Hostnames are human-readable names that identify devices or services on the Internet, such as www.google.com or mail.yahoo.com. IP addresses are numerical identifiers that specify the location of devices or services on the Internet, such as 172.217.14.206 or 98.137.11.163. DNS allows users to access websites or services by using hostnames instead of IP addresses, which are easier to remember and type. DNS also allows hostnames to change their IP addresses without affecting the users, which can improve performance and security.
References: The following web search results provide more information about DNS and how it translates hostnames to IP addresses:
What is DNS? | How DNS Works | Cloudflare: This article explains the concept of DNS, its components, its functions, and its benefits.
Hostname vs. IP - address - Stack Overflow: This answer compares the differences between hostnames and IP addresses, and how DNS resolves them.
How DNS Works: Domain Name System(DNS): This article illustrates how DNS works with diagrams and examples.
