UNIT4. NETWORK AND INTERNET

1-A computer network is an exchange of information between two or more computers

the simplest of a computer network is that of two computers connected directly through a network cable.

    

2- By conected various computers to a device called a switch. There are switches for 4, 8, 10,12,16, 24 or              more computes.

 3-

ACTIVITY 1.

a) Copy and complete the table in your blog about these means of communication:

	MESSAGES	MEANS	CODE
TELEGRAPH	morse code	Electric cable	sounds
FAX	PAPER	line phone	Sounds
SMOKE SIGNAL	smoke	air	binary
POST OFFICE	post	post man
TELEPHON	audio	electric cable
TELEVISION	audio and images	ondas

 b) Do you know Morse code? The most famous message is SOS  ***---***. Transmit a message to your partner in morse touching his back quickly for the dots and longer for the dashes. Look at the code on the internet and copy it into your blog. Write down your name with this code.

--.- ..- . / .... --- .-. .- / . ...

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