A dedicated firewall is more for complex network setups or larger organizations, where this dedicated device would be placed between the ISP and the LAN to filter and monitor network traffic before it reaches the internal network.
Comprehensive and Detailed Step-by-Step Explanation:To determine the correct device, we need to understand how a DOCSIS (Data Over Cable Service Interface Specification) network functions in a Small Office/Home Office (SOHO) environment:
C. Cable Modem:
A cable modem is required to convert the signal provided by the ISP (Internet Service Provider) over a DOCSIS network into a format that is usable by the local area network (LAN).
DOCSIS is a standard for high-speed internet over cable television infrastructure, and the cable modem acts as the gateway between the ISP's coaxial network and the LAN.
Without the cable modem, devices in the LAN would not be able to access the internet.
Reference: CompTIA A+ Core 1 Exam Objectives (220-1101), Domain 2.2 – Compare and contrast Internet connection types, network types, and their features.
A. Switch:
A switch is used to connect multiple devices within the LAN. It does not connect the LAN to the ISP's DOCSIS network.
B. Firewall:
While firewalls provide security by managing inbound and outbound traffic, they do not serve as the interface between the ISP and LAN.
D. Router:
A router directs traffic between different networks (e.g., between a LAN and the internet). However, in a DOCSIS network, the cable modem is the device that first connects to the ISP. Many modern cable modems also include built-in routers, but the modem is the primary device needed.
E. Access Point:
An access point provides wireless connectivity within the LAN. It does not connect directly to the ISP or handle DOCSIS signals.
Cable modem and Router is the same thing when it comes to commercial ISPs like Xfinity Comcast. The latter being the right answer in my opinion. Idk how Firewall is the second place of majority
since it's a SOHO network, the answer depends on the means of achieving the connection. If it's coax, you need a cable modem, but if it's cellular or fiber based you don't. Unequivocally, you need a router, and most of them are combination devices that perform firewall and gateway services.
clarity in the question would provide a key distinction, but more specific questions lead to easier answers. so deal with the vagueness as you will.
Wires along the powerlines from your ISP to your house, Cable from the powerlines into your house to your Modem.. cable from your modem to your router.. how is Modem not the correct answer here?
The answer is D
Hint in the question is Between ISP and LAN
ISP communication is coming outside the network (WAN) Wide Area Network
(LAN) Local Area Network is the SOHO network.
What device will let us communicate in and out of LAN & WAN?
That would be a router
More info about routers that will help on the exam
Router = Gateway IP Address
Router have their own separate IP address
Your device use the gateway IP address to send data to the router, which the router will send that data to where ever it need to try to communicate.
Hope this helps out
Firewall is an network device. You might be confused with firewall on your computer.
There are physical hardware firewall devices you can put onto your network.
But for this question, the answer is router.
Why? Because you need a gateway(router) to communicate out to WAN.
Small office/home office (SOHO) routers are a staple networking appliance for millions of consumers. They are often the single point of ingress and egress from a SOHO network, manage domain name resolution, firewall protections, dynamic addressing, wireless connectivity, and of course, routing.
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