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20 Cards in this Set
- Front
- Back
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What are different wireless networking technologies? |
-Wireless LANS -RFID -WiMAX -Bluetooth |
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What are the two basic building blocks needed for any network? |
-Nodes -Links |
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What are nodes?
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Hosts = End devices (PC, workstations,servers, audio-video equipment, mobile devices etc.) |
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What are links? |
UPT (unshielded twisted paircable), co-axial, fibre, wireless etc. techniques and protocols |
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What are different networking topologies? |
-Point-to-Point -Linear -Bus -Ring/Dual-Ring -Star -Mesh |
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What is a Point-to-Point topology? |
–Simple topology that has two nodes connected by a link –Can serve as a building block for other topologies |
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What is a linear topology? |
Multiple point-to-point links connected in a linear fashion |
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What is a bus topology? |
Traditional Ethernet = Linear topology but all nodes share a single link |
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What is the main problem and fix for the bus topology?
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Problem: Sharing the single link by multiple users may result in collisions Solution: Medium Access Control (MAC) Protocols are used. E.g CSMA/CD |
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What is a ring topology? |
Old token ring networks: •Multiple nodes that share a single link are connected as a ring •Transmission is ordered with no collision using a token passing mechanism -Token is a special packet (bit pattern) that rotates around the ring -Only the node that acquires token is allowed to transmit. |
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What is a dual ring topology? |
FDDI networks: •FDDI: Fibre distributed data interface (A metropolitan network). •Two counter rotating rings |
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What is a star topology? |
(Hub/switch based ethernet): •Multiple nodes connected to an interconnection device •Easier to install than the bus topology •Better fault tolerance |
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What is a mesh topology? |
Multiple point-to-point links connected to form an arbitrary configuration |
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What are the components of a diagram of a generic network? |
-Network cloud = any topology
-Interconnection component (router, switch, bridge, gateway, etc.) |
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Briefly describe the application layer of the internet protocol stack. |
Supporting network applications: FTP, SMTP, STTP |
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Briefly describe the transport layer of the internet protocol stack. |
Host to Host data transfer: TCP, UDP |
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Briefly describe the network layer of the internet protocol stack. |
Routing of datagrams from source to destination: IP, routing protocols |
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Briefly describe the data link layer of the internet protocol stack. |
Data transfer between neighboring network elements: PPP, Ethernet |
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Briefly describe the physical layer of the internet protocol stack. |
Bits "on the wire" |
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What does each layer of the internet protocol stack do? |
Takes data from the above and: - adds header information to create new data unit - passes new data unit to layer below |
