31 lines
1.9 KiB
Markdown
31 lines
1.9 KiB
Markdown
# Host Roles
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- To be a part of a global community, a device must be connected to a network connected to the internet.
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- All devices connected to a network and participate directly in net communication are classified as hosts. Some hosts are called end-devices, some clients. The term host is refers to any device given a number for communication purposes to identify it.
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- This number is referred to as an IP ( Internet Protocol ) address, which identifies the network and host.
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- An example of a client is a browser ( Firefox, Chromium, Safari, etc ). A computer can run many types of client applications ex. a user can check email and view a web page while instant messaging and listening to an audio stream.
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# Peer-to-Peer ( P2P )
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- Client and server software usually run on separate devices, however one computer can be used for both roles - this is defined as a Peer-to-Peer network: a device functions as both a server and a client.
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- For example, in the figure below, a print sharing PC has a USB connection to the printer, with a network connection to the file sharing PC using a NIC. This allows the file sharing PC to print files, routing through the print sharing PC.
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## Advantages
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- Easy setup
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- Low complexity
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- Low cost, dedicated servers not required, and networking equipment not required
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- Can be used for simple tasks ( File transfer, print sharing )
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## Disadvantages
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- No central admin
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- Not secure
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- No scalability
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- Multi-use devices must dedicate resources to both client and server tasks.
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# End Devices
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- Each end device has an IP address
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- When communication initiated, an IP address is referenced to indicate the destination
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- End device can either be the source or destination
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# Intermediary Devices
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- Connect the end device to a network.
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- Can connect multiple networks together to create an internetwork
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- Use end point IP address, with information about |