COMPTIA

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Author:
Prittyrick
ID:
288522
Filename:
COMPTIA
Updated:
2014-11-07 16:29:27
Tags:
CompTIA Network Topology
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Description:
Network Topology
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  1. BUS NETWORK
    This topology is an old one and essentially has each of the computers on the network daisy-chained to each other. The advantage is that it is cheap to setup. However the disadvantages are that it creates excessive network traffic, a failure may affect many users, and problems are difficult to troubleshoot.
  2. STAR NETWORK
    The star topology uses twisted pair (10baseT or 100baseT) cabling and requires that all devices are connected to a hub. Advantages are centralize monitoring, failures on the network do not affect others, and it is easy to modify
  3. HYBRID NETWORKS
    These are combinations of the Bus and Star topologies and are very common in large networks.
  4. MESH NETWORK
    In this topology, every node has a connection to every other node in the network. It is very expensive, but also provides full redundancy in case of a failure.
  5. POINT TO POINT NETWORK
    Basically building to building
  6. Point to Multi-Point NETWORK
    Basically, a building to client bridges, and then to a building or other clients
  7. TREE NETWORK
    Hubs are connected to each other, then all hubs connect to clients
  8. The  7 Layers of Open Systems Interconnection (OSI) model
    • 1. Physical
    • 2. Data Link
    • 3. Network Layer
    • 4. Transport
    • 5. Session
    • 6. Presentation Layer
    • 7. Application (API) Layer
  9. Physical layer
    Physical layers describe the electrical or optical signals used for communication. Physical layer of the Open Systems Interconnection (OSI) model is only concerned with the physical characteristics of electrical or optical signaling techniques which includes the voltage of the electrical current used to transport the signal, the media type (Twisted Pair, Coaxial Cable, Optical Fiber etc), impedance characteristics, physical shape of the connector, Synchronization etc
  10. Datalink Layer
    The Data Link layer resides above the Physical layer and below the Network layer. Datalink layer is responsible for providing end-to-end validity of the data being transmitted.

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