Part 10. Switch Configurations

Date: 2015-10-07; view: 474.

Exercise 3. Choose the necessary word and put it in the sentence

Exercise 2. Dialogue

Steve: Hi, Alice, look at these figures.

The price of sugar is going up 10% during the next year.

Alice: Oh, that is bad. Sugar is the main ingredient, you know. What is your opinion?

Steve: Weil, we are not the price leaders in the field and jam is a very price sensitive item.

Alice: I have a good idea. You know, this could be a great marketing opportunity for us.

Steve: What do you mean?

Alice: Well, because of the increase in the price of sugar the price of jam will go up too. The increase will then pass on to the consumer, won't it?

Steve: Right.

Salty: Imagine, we find a way of changing the ingredients in the jam so that we wouldn't have to raise the price.

Steve: Sure. We'll be able to sell the jam at the same price.

Alice: And we'll sell more and become the leader in the market. What a promotional campaign we could have.

1. Market... helps the producer to predict what people will want.

2. .... is very expensive.

3. Market research attempts to influence ... to buy.

4. It provides a wide range of... and plenty of parking facilities.

5. Marketing operations include .... buying, storage, ... etc.

(distribution, research, customers, merchandise, product planning, pricing).

LAN switches vary in their physical design. Currently, there are three popular configurations in use:

· Shared memory ─ This type of switch stores all incoming packets in a common memory buffer shared by all the switch ports (input/output connections), then sends them out via the correct port for the destination node.

· Matrix ─ This type of switch has an internal grid with the input ports and the output ports crossing each other. When a packet is detected on an input port, the MAC address is compared to the lookup table to find the appropriate output port. The switch then makes a connection on the grid where these two ports intersect.

· Bus architecture ─ Instead of a grid, an internal transmission path (common bus) is shared by all of the ports using TDMA. A switch based on this configuration has a dedicated memory buffer for each port, as well as an ASIC to control the internal bus access.