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What is a metropolitan area network (MAN)?

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What is a metropolitan area network (MAN)?

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A metropolitan area network (MAN) is a computer network that connects computers within a metropolitan area, which could be a single large city, multiple cities and towns, or any given large area with multiple buildings. A MAN is larger than a local area network (LAN) but smaller than a wide area network (WAN). MANs do not have to be in urban areas; the term "metropolitan" implies the size of the network, not the demographics of the area that it serves.

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A personal area network (PAN) connects electronic devices within a user's immediate area. The size of a PAN ranges from a few centimeters to a few meters. One of the most common real-world examples of a PAN is the connection between a Bluetooth earpiece and a smartphone. PANs can also connect laptops, tablets, printers, keyboards, and other computerized devices.

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WHAT ARE WIDE AREA NETWORKS?

-WAN span large geographic areas.

=> What is the difference between LAN and WAN?

1. WANs usually need a router port
2. WANs span larger geographic areas and can link different locations
3.WANs are generally slower
4. We can decide when we want to connect to WANs while LANs is connected permanently
5. WANs can utilize either private or public data transport media such as phone lines

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A local area network (LAN) is a collection of devices connected together in one physical location, such as a building, office, or home. A LAN can be small or large, ranging from a home network with one user to an enterprise network with thousands of users and devices in an office or school.

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Hosts are any network devices with an IP address.

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Servers are powerful computers that run specialized software known as the network operating system. They maintain and control the network. They only handle one job which is intensive to get the optimal performance.

Some types of servers include:

1. File servers - stores and dispenses files
2. Mail server - handles email functions
3. print sever - manages printers on the network
4. Proxy servers - Handles tasks in the place of the other machines in the network.

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A computer network is mainly of four types:

LAN(Local Area Network)

PAN(Personal Area Network)

MAN(Metropolitan Area Network)

WAN(Wide Area Network)

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Workstations are powerful computers that run more than one central processing unit. Its resources can be accessed by user on the same network. But do not mistake workstations with servers! Workstations are used by end to end users on a daily basis.

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The three most common are:
1. Workstations
2. Servers
3. Hosts

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The term network means two or more connected computers that share resources.

=> What type of resources?
- data and application
- office machines
- An internet connection
=> How do they send those data?
- They send those data through a series of '0' and '1' known as binary code.

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Learning how networks work is essential when you want to start hacking. I mean how are you going to hack other computers on the same network if you don't know how networks work?

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A black hat hacker (or black-hat hacker) is a hacker who violates computer security for their own personal profit or out of malice.

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A grey hat (greyhat or gray hat) is a computer hacker or computer security expert who may sometimes violate laws or typical ethical standards, but does not have the malicious intent typical of a black hat hacker.

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A white hat (or a white hat hacker) is an ethical computer hacker, or a computer security expert, who specializes in penetration testing and other testing methodologies that ensure the security of an organization's information systems.

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A hacker originally meant someone who likes to do new things with computers. Now hacker is used to mean "someone who tries to get into another person's computer using computer software such as Trojan horse programs, computer viruses, and worms that can hurt other people computers". The correct name for a person doing these illegal things was cracker, but many news stories used the word hacker even though it was in error.[1] Another meaning of hacker is someone who can change or program something, like how people can change or program a Furby to say something insulting or humorous.

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A hacker originally meant someone who likes to do new things with computers. Now hacker is used to mean "someone who tries to get into another person's computer using computer software such as Trojan horse programs, computer viruses, and worms that can hurt other people computers". The correct name for a person doing these illegal things was cracker, but many news stories used the word even though it was in error. Another meaning of hacker is someone who can change or program something, like how people can change or program a Furby to say something insulting or humorous.

A person doing something illegal with a computer belonging to someone else without asking for permission from the owner is also called a hacker.

In the recent years computers were becoming increasingly more complex. This also means that people with bad intentions have more opportunities to use them for criminal purposes. Computer engineers aren't always able to find vulnerable places in the computer code. Hackers find such places, and use them.

There are also hackers who use the same skills for good purposes. Such hackers are called white hat hackers. They help computer engineers to find vulnerable places and correct problems.

A lot of skills are often required to be a hacker. A hacker should be able to find problems or solutions that most other people cannot find.

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Hacker - Simple English Wikipedia, the free encyclopedia

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A hacker originally meant someone who likes to do new things with computers. Now hacker is used to mean "someone who tries to get into another person's computer using computer software such as Trojan horse programs, computer viruses, and worms that can hurt other people computers".