4G technology offers a significant speed improvement over 3G, typically around 10 times faster for peak theoretical speeds.

A proxy server acts as an intermediary, forwarding client requests to external servers and returning responses to the client.

A Wide Area Network (WAN) is defined by its ability to span large geographical distances, connecting disparate locations.

DNS is the system that maps IP addresses to domain names for easy navigation.

NAT is the process that enables multiple devices on a local network to share a single public IP address for internet access.

A server is a computer that provides data or services to other computers over a network, often referred to conceptually as a 'server frame'.

Linear topology is not a standard or recognized type of network arrangement.

A host is a generic term for any device on a network that can communicate.

A modem is specifically designed to translate digital signals from a computer into analog signals suitable for transmission over phone lines or other communication mediums, and vice versa.

Narrowband channels are defined by their limited bandwidth, which restricts the amount of data they can transmit.

MAN is a common acronym representing a type of computer network that spans a metropolitan area.

HTTP is the foundational protocol for data communication on the World Wide Web, defining how messages are formatted and transmitted.

A modem's primary function is modulation and demodulation, enabling digital-to-analog conversion for transmission over analog lines.

Telnet is a network protocol used for remote command-line login and interaction with a remote computer.

A carrier is a signal or wave that is modulated to carry data.

A modem is an essential hardware device that translates digital data from a computer into an analog signal for transmission over telephone lines and vice versa, enabling internet connectivity.

Optical fiber is a medium for transmitting data, not a network itself, unlike routers and switches which are networking devices, and Ethernet cable which is a network medium.

The 7-bit ASCII code was a foundational standard for representing text characters in early data communication systems due to its compact size.