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

Question 24

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Appeared in Year: 2009

Question

Match List-Ⅰ List-Ⅱ▾

Match the following

List-Ⅰ (Column-I)List-Ⅱ (Column-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 — 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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