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O. Make summary of the third and the fourth parts of text 2 using opening phrases on page __ .


Date: 2015-10-07; view: 625.


Look through the third and the fourth parts of 2 once more and mark the statements as true (T) or false (F).

Answer the following questions using the information from the third and the fourth parts of text 2.

1. What do all of these networks rely on to talk to each other? 2. How long does it take for a message to leave one computer and travel halfway across the world through several different networks at another computer? 3. What do the routers do? 4. What two jobs does a router have? 5. What organization created the first high-speed backbone in 1987? 6. What was NSFNET? What companies worked with NSF and developed a T3 backbone? 7. What does the trunk line have to increase the capacity? 8. How many bits per second is an OC-48 capable of transmitting?

1. The routers determine where to send information from one computer to another.
2. A router has three separate, unrelated jobs.
3. In performing its jobs, a router is absolutely useless in dealing with two separate computer networks.
4. A router only joins the two networks, passing information from one to the other, and doesn`t protect the networks
5. The basic operation and function of the router remains the same, no matter how many networks are attached.
6. The National Science Council created the first high-speed backbone in 1987.
7. Backbones are usually fiber optic trunk lines.
8. An OC-3 line is capable of transmitting 2, 488 Mbps.

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