Netlink ICT Interview Questions and Answers

A 3+1 cable is a type of cable used in CCTV systems, with three cables for video transmission and one cable for power supply.

• A 3+1 cable consists of three cables for video transmission and one cable for power supply.

• The three video cables are typically used for transmitting the video signal from the CCTV camera to the recording device.

• The power supply cable is used to provide power to the CCTV camera.

• This type of cable is commonly used in CCTV installations to simplify the wi...read more

DVR stands for Digital Video Recorder, a device that records and stores video footage from surveillance cameras.

• DVRs are commonly used in security systems to monitor and record activity in a specific area.

• They can be connected to multiple cameras and can store footage for a certain period of time.

• DVRs can also be accessed remotely through a network connection.

• They have largely replaced analog VCRs in surveillance systems due to their higher quality and reliability.

• Examples of...read more

A power supply is a device that provides electrical energy to an electrical load.

• A power supply converts input voltage into the desired output voltage or current.

• It ensures that the electrical load receives a stable and reliable power source.

• Power supplies can be found in various electronic devices such as computers, televisions, and smartphones.

• Examples of power supplies include AC adapters, batteries, and power distribution units (PDUs).

B and C are abbreviations commonly used in the CCTV industry to refer to different types of video signals.

• B stands for Baseband video signal, which is the original unmodulated video signal.

• C stands for Composite video signal, which combines the baseband video signal with synchronization and color information.

• B and C are often used to describe different types of CCTV cameras and video transmission methods.

• For example, a BNC connector is commonly used for transmitting B or C vi...read more

A hard disk is a data storage device that uses magnetic storage to store and retrieve digital information.

• A hard disk is a non-volatile storage device that is used to store and retrieve digital data.

• It consists of one or more rigid platters coated with a magnetic material.

• Data is written and read using a magnetic head that moves across the platters.

• Hard disks are commonly used in computers, servers, and CCTV systems to store video footage.

• They provide large storage capacities...read more

To give power to a camera, you need to connect it to a power source using a power cable or adapter.

• Cameras typically require a DC power supply.

• The power cable or adapter should match the camera's power requirements.

• Ensure the power source is compatible with the camera's voltage and current needs.

• Connect the power cable to the camera's power input port.

• Plug the other end of the power cable into a power outlet or a power distribution unit (PDU).

NVR stands for Network Video Recorder.

• NVR is a device used to record and store video footage from IP cameras.

• It is connected to a network and can be accessed remotely.

• NVRs typically have built-in storage and can support multiple cameras.

• They offer advanced features like motion detection, video analytics, and remote viewing.

• NVRs are commonly used in surveillance systems for homes, businesses, and public spaces.