Which of the following network devices converts wireless signals to electronic signals?

An access point (AP) is the network device specifically designed to function as a bridge between a wireless medium and a wired medium. It receives data transmitted as radio frequency (RF) waves from wireless devices, demodulates these signals, and converts them into electrical signals that can be transmitted over a wired Ethernet cable to the rest of the network. Conversely, it converts electrical signals from the wired network into RF waves for transmission to wireless clients. This conversion is its fundamental purpose in enabling wireless connectivity to a wired infrastructure.

A. Router: A router's primary role is to forward data packets between different logical networks (Layer 3), making path determinations based on IP addresses, not to convert physical signal types.

B. Firewall: A firewall is a security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules; it does not perform physical layer signal conversion.

D. Load balancer: A load balancer distributes network traffic across multiple servers to ensure high availability and reliability. It operates at higher network layers and is not involved in signal conversion.

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1. Kurose

J. F.

& Ross

K. W. (2021). Computer Networking: A Top-Down Approach (8th ed.). Pearson.

Section 7.2.2

"The 802.11 Architecture": This section describes the role of the Access Point (AP) as part of the Basic Service Set (BSS). It states

"The AP in turn is connected to a wired network... Thus

the AP plays a central role in an infrastructure WLAN

relaying data between the wireless stations and the wired network." This relay function inherently includes the conversion of wireless RF signals to wired electrical signals.

2. Cisco. (2023). Cisco Catalyst 9120 Series Access Points Data Sheet.

Document Section: "Product overview": The document describes the access point's function: "They are the next generation of enterprise-class access points... ready for the next-generation wireless standard

Wi-Fi 6... These access points are the bridge between the wired and wireless worlds." This explicitly defines the AP as the bridge performing the conversion.

3. Massachusetts Institute of Technology (MIT) OpenCourseWare. (2018). 6.033 Computer System Engineering

Spring 2018.

Lecture 15: Wireless

Section 15.2.1 "802.11": The lecture notes explain that in an infrastructure network

wireless hosts communicate with a base station (the access point)

which is connected to the wired network (the distribution system). This connection necessitates the translation between the wireless and wired physical layers.