Computer : Ch.1 Computer network (Textbook Exercise)

 

Ch.1 Computer network (Textbook Exercise )

Q.1  Identify the following network components.

1.       Router

2.       Network Interface Card (NIC)

3.       Fiber Optic Cable

4.       Switch

Q.2 How is a hub different from a switch?

Answer: When the hub receives a message for a particular computer, it sends it to every other computer on the network. Therefore, hub-based networks are not very safe.

Q.3 Explain the role of a modem in a network.

Answer: A modem is a short form for the Modulator and Demodulator, used to convert analog signals to digital signals when they are received by the computer, and digital signals to analog signals when they are transmitted from the computer through cables.

 

Q.4 Define router. What is it used for?

Answer: A router is a hardware device that connects two different networks of the same type. It is used to receive, analyze and move information from one network to another.

 

Q.5 Write the full forms of the following.

1.       HTTP : Hyper Text Transfer Protocols

2.       TCP/IP : Transmission Control Protocol / Internet Protocol

3.       FTP : File Transfer Protocols

4.       IMAP : Internet Message Access Protocol

5.       SMTP : Simple Mail Transfer Protocol