IGCSE Information & Communication Technology Paper-1: Specimen Questions with Answers 24 - 24 of 46

Question 24

Appeared in Year: 2009

Question

Match List-Ⅰ List-Ⅱ▾

Match the following

List-ⅠList-Ⅱ
(A)

Wireless Modem

(i)

Installed on the slots of the motherboard

(B)

Internal Modem

(ii)

Transmits data through the air

(C)

ISDN modem

(iii)

Can operate over a stander telephone

(D)

DSL modem

(iv)

Also called broadband modem

Choices

Choice (4)
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (i)
  • (iii)
  • (iv)
  • (ii)

b.

  • (ii)
  • (i)
  • (iii)
  • (iv)

c.

  • (ii)
  • (i)
  • (iv)
  • (iii)

d.

  • (i)
  • (ii)
  • (iii)
  • (iv)

Answer

b.

Explanation

  • Wireless modem, DSL modem, ISDN modem and internal modem are different types of modem.
  • A modem is a device that connects a computer to a telephone line, or other external communication link such as television cables (coaxial cables or fiber optics) , or microwaves.

There are many types of modem.

  • External Modem
  • Internal Modem
  • Wireless Modem
  • Fax modem
  • Dial-up modem
  • DSL modem
  • ISDN modems
  • External modem: An external modem is a removable device which is used for communication purpose. This type of modem is externally connected with a computer with a com port or USB port and has some lights which indicate the processing status. The external modem may dial-up modem or broadband modems.
  • Internal Modem: An internal modem or on-board modem is a type of modem that is installed on the slots of the motherboard. This modem is an expansion card. An internal modem is a circuit board that can be attached inside the system through expansion slots. It cannot be moved easily from one PC to another. Its set up is difficult.
  • Wireless Modem: The wireless modem transmits data through the air (using unguided media) instead of cable (guided media) . It is also called radiofrequency modem. These are designed to work with cellular technology and wireless local area networks. These are not yet perfected but the technology is rapidly improving.
  • DSL modem: DSL (digital subscriber line) modem also called broadband modem is used for providing broadband service to a different kind of internet connection. This modem transmits height speed data. Broadband modems typically have transfer rates from 1.5 to 8 MBPS (megabytes per second) , or higher. DSL modems are suitable for high-speed internet and data transfer over an ordinary phone line.
  • ISDN modem: ISDN stands for integrated services for the digital network is a type of communication standards for simultaneous digital transmission of voice, video data over a single wire or optical fiber. It can operate over a stander telephone, wires or other media. It is completely digital in nature from one end of the connection to another.

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