2. COMPUTER NETWORK
introduction
• What is a pc network?.................3
• Types…………………………………………….4..5
• Topologies…………………………………….6..7..8
• Conclusions……………………………………9
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3. Computer network
A computer network or data network is a telecommunications network which allos computerto
Exchange data in computer networks , networked computing devices Exchange data with each
other using a data link the connections between nodes are establishedusing eithercable media or
wireless media. The best-known computer network is the internet.
Network computer devices that originate, route and terminate the data are called network nodes.
Nodes can include hosts such as personal computers, phones, servers as well as networking
hardware. Two such devices can be said to be networked together when one device is able to
Exchange information with the other device, whether or not they have a direct connection to
each other.
Computer networks differ in the transmission médium used to carry their signals, the
communications protocols to organize network traffic, the network´s size, topology and
organizational intent.
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4. Types
There are many classifications of networks we will focus on some of them so we have.
Depending on the size of the network, we distinguish LAN,MAN and WAN.
LAN: local área network multiple computers with limited by cables or power range wireless
antennas are connected for example network institute.
MAN: metropolitan área network. Network formed by a set of LAN networks in which computers
are connected, for example the board of Extremadura.
WAN: widw área network interconnect devices in a very large anvironment, like a country using the
telephone network.
According to the physical médium used for connection we find different types of networks based
on the physical médium used to transmit the information so we have: wireline networks that use
cables that are twisted pair and usually with RJ45 connectors, and use parallel cables to connect
the compute to the switch and crossover cables to connect computers together.
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5. Inhalambricas network: the lap top connection is made via the electromagnetic waves propagating
betwee a transmitting antenna and a receiver.
Normally hybrid networks is usually LAN networks with wires but in which one of its nodes is a
wireless Access point that allows wireless conection other wireless devices.
According to network topology
Bus or liear: it has a central cable leads.
Star: all computers are connected to a hub or central hub and not connected to eachother.
Ring: all connect describing a ring, the information reaches a computer if you do not need passes
to the next.
Mesh: each computer is connected to other computers with more tan one cable.
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6. Topologies
BUS: a bus network topology is that characterized by having a single communications channel
(called bus, backbone or backbone) to which the different diveces are connected. Thus all devices
share the same channel to communicate.
MIXED: the mixed topologies tree, star-star-star-bus, etc. Its implementation is due to the
complexity of the network solution, or the increase in the number of devices, which is necessary
to establish a topology of this kin.
ANILLO: a ring network os a network topology in which each station has a single input connection
and one output. Each station has a receiver and transmitter that serves as a translator.
DOUBLE RING: a double ring topology as its name impies insatead of just having a ring has two
conventric rinags to transmit information, where each nerwork host is connected to boch rings,
although both rings are not directly connected to each other.
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7. TREE: the tree network is a network topology in which the nodes are arranged in a tree. From a
topological view, it is similar to a series of interconnected networks except hat star has no centarl
node. Instead, it has a trunk node, usually occupied by a hub or switch, from switch, from switch
branch the other node.
MESH: mesh topology network is a network topology in witch each node is connected to all nodes.
In this way it is posible to carry messages from one node to another by differentroutes.
TOTALLY CONNECTED: the fully connected network topology is a very effective since this fully
united all nodeshere topologies to unite them gives a totally conexa. en case one of the wirings is
reached damage of some node information shown not for others effected nodes.
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9. Conclusions
-topologies used to exchange data.
-There are various types of computer network.
-A very functional analogy is to compare a network topology with the
plans of a house or building, as this tells you the exact location of each
quarter, plumbing, electricity.
-The network topology is the physical arrangement which connects a
computer network.
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