Two standard fiber-optic connectors are Lucent Connectors (LC) and Subscriber Connectors (SC). The Lucent Connector, commonly referred to as LC, was developed by Lucent Technologies and is characterized by its small form factor with a 1.25mm ferrule. It is widely used in high-density applications due to its compact size and square shape1. The Subscriber Connector, or SC, is known for its push-pull latching mechanism and uses a 2.5mm ferrule. It is a square-shaped, duplex connector that has been a dominant fiber optic connector for decades due to its performance and reliability12.

The show cellular unit network command in Cisco IOS is used to view detailed information about the cellular modem and the network it's connected to. Here's the type of information this command usually displays:

Network Status: Whether the device is registered on the cellular network.

Carrier Information: The name of the cellular network provider.

Technology: The cellular technology in use (e.g., 3G, 4G/LTE).

Signal Strength: Signal strength indicators like RSSI and RSCP.

Cell Site Information: Data about the cell tower or base station the device is connected to.

IP Address: The IP address assigned to the cellular interface.

Why other options are less likely:

show cellular unit radio: Provides information about the radio module itself, such as its state and power levels.

show cellular unit hardware: Focuses on hardware-level information of the cellular unit.

show cellular unit profile: Displays configuration details of the cellular profile used to connect to the network.

References:

Cisco command documentation for different show cellular options:

Router

The AUX (Auxiliary) port on a router is used for dial-in access for CLI (Command Line Interface) management purposes. It is typically connected to a modem and allows an administrator to dial into the router’s CLI for remote management. This port is not used for passing normal network traffic, which differentiates it from other ports like Fast Ethernet or Gigabit Ethernet that handle regular data flow. The AUX port is specifically designed as a backup async port for management access1.