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23 Cards in this Set
- Front
- Back
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What are the necessary elements for a successful communication |
-the recievers computer address -the senders computer address -data format -transmission medium |
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What are the fundamentals of computer communication |
Message gets converted to electric/optical/wireless sigbal and is then sent across the cable/optical fibre/radio frequency to the destination host and is then converted back to electric/optical/wireless signal and is then converted back into the message |
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What are the OSI reference model |
-Application -Presentation -Session -Transport -Network -Data-link -Physical |
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What does OSI stand for? |
Open Systems Interconnection |
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What is the Applicatiob layer? |
It is the layer between the applications and network(it shows the information) |
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What is the presentation layer |
This translates the data that is to be displayed in the application layer. |
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What is the session layer? |
Session layers provide the mechanism for opening and closing sessions for end user programs |
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What is the Transport Layer |
The transport layer are the different internet protocols that allow host to host communication services for applications. |
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What is the network layer |
The network layer is the layer that is responsible for data routing paths |
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What is the data link layer |
It is the layer that is responsible for encoding and decoding data bits |
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What is the physical layer |
The physical layer is the layer that provides the means to transmit raw data bits(wiring/cabling/frequences/pulses) |
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What are the layers of a switch |
-data link -physical |
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What are the layers of a router |
-network -data link -physical |
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What are the advantages of a layered model |
-it prevents from a change in one layer to affect the other layers -it provides a language that allows all to describe networking function -it helps in protocol design |
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What are the protocols for computer communication? |
-a clear declaration of who is sending and recieving -a common language and grammar -the speed and the timing of the delivery -the confirmatiob and acknowledgement of requirements |
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What are the steps of encapsulation |
-The upper 3 layers(application, presentation and session) convert the message and send it to the transport layer -The Transport Layer converts the data into segments and sends it down to the Network Layer. -The Network Layer converts the segments into packets and sends it the the Data Link Layer -The Data Link Layer converts the packets into frames and sends it to the Physical Layer -The Physical layer converts the frames to 1's and 0's and sends them across the network |
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What are the Layers of the TCP/IP model |
-Application Layer -Transport Layer -Network Layer -Network Access |
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What are some examples of Application? |
Http: Dictates how the web server reacts accordingly to the client by defining the formatting and the content of the requests and responses that are exchanged between the client and server. |
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What are some examples of Transport? |
TCP: it divides the Http messages into smaller pieces called segments. It also controls the size and rate at the messages are exchanged |
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What are some examples of internet? |
IP: It encapsulates the TCP segments into packets and assign the correct addresses and sends them to the destination host |
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What are some examples of Network Access? |
Ethernet: Formats IP packets to be transmitted over the media. |
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Which layers are responsible for Network Access in the OSI model? |
-Data link layer -Physical layer |
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Which layers are responsible for Network Access in the TCP/IP model |
Network Access |
