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20 Cards in this Set
- Front
- Back
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What are 2 types of bridges?
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1. Simple bridge
2. Learning bridge (similar to a layer-2 switch) |
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What layer to bridges operate at?
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Data link layer
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What layer do routers operate at?
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Network layer
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What are the 4 basic types of backbone networks that can be mixed together?
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1. Routed backbones
2. Bridged backbones 3. Collapsed backbones 4. Virtual LANs |
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What are the 3 backbone architecture layers?
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1. Access layer (LAN)
2. Distribution layer (usually within one building) 3. Core layer (building to building) |
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Routed backbones move packets using...
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network layer addresses
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Bridged backbones move packets using...
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data link layer addresses
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What type of topology do routed backbones use?
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Bus topology
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What type of topology do bridged backbones use?
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Bus topology
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What type of topology do collapsed backbones use?
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Star topology
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Rack-based backbones collapse the backbone into a single room called...
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A main distribution facility (MDF)
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Devices in a main distribution facility are connected using...
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Patch cables
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What are the 2 basic designs of a virtual LAN?
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1. Single switch
2. Multi-switch |
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What 4 ways are computers assigned to individual VLANs in a single switch VLAN?
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1. Port-based VLANs
2. MAC-based VLANs (advantage when moved) 3. IP-based VLANs (advantage when moved) 4. Application-based VLANs |
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What is FDDI?
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Fiber Distributed Data Interface (operates at 100 Mbs)
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What topology does FDDI use?
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It uses a physical and logical ring topology (self healing rings)
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What 4 ways does ATM differ from Switched Ethernet?
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1. ATM uses small, fixed-length packets of 53 bytes
2. ATM provides no error correction along the way 3. ATM uses virtual channels instead of fixed addresses 4. ATM prioritizes based on QoS |
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What are the two types of ATM virtual circuits?
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1. Permanent virtual circuits (PVCs)
2. Switched virtual circuits (SVCs) (deleted after completed) |
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What are 2 methods of translating ethernet frames before sending over an ATM network?
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1. LAN Encapsulation (LANE)
2. Multiprotocol Over ATM (MPOA) |
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What characteristics would be included in the "ideal" backbone?
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1. Combined use of layer 2 and layer 3 switches
2. Access layer uses 10/100 layer 2 switches 3. Distribution layer uses layer 2 switches with 10BaseT or Fiber 4. Core layer uses layer 3 switches 5. Redundant switches and cabling |
