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 (220-1201), Domain 2.2 – Compare and contrast Internet connection types, network types, and their features., Incorrect Options:, 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., Key Takeaway:The correct device required to interface between the ISP's DOCSIS network and the SOHO LAN is the cable modem., , , , , , , , ]