hierarchical topology design. 2 topology design topology is a map of an___________ that indicates...
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Hierarchical Topology Design
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Topology Design Topology is a map of an___________
that indicates network segments, interconnection points, and user communities.
Show the ___________ of the network. ______ step in the logical design
phase. Performed before selecting ________
products or technologies.
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Network Design Model Mesh
The net topology is ____; all routers perform essentially the _____ functions, and there is usually __ clear definition of where specific functions are performed.
Hierarchical. The network is organized in _____ that
each have one or more specific functions.
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Mesh Design Problem Too many CPU adjacencies.
Too many ________. CPU workload required for routers to
communicate with many other _____s and process _______________.
______ to optimize, troubleshoot, and upgrade.
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Mesh Topology
Partial Mesh Full Mesh
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Flat Loop Topology Hierarchical Redundant Topology
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A Partial-Mesh Hierarchical Design
Headquarters(Core Layer)
RegionalOffice(Distribution Layer)
Branch Offices (Access Layer)
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Benefit of Hierarchical Design Scalability –
Networks can grow much larger without sacrificing control or manageability because functionality is _________ and potential problems can be _______ more easily. E.g., PSTN
Ease of implementation – Clear functionality at _________, thereby making network
implementation easier. Ease of troubleshooting –
The functions of the individual layers are well defined, and thus _________ of problems in the network is less complicated.
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Benefit of Hierarchical Design (cont.) Predictability –
The ________ of a network using functional layers is fairly predictable, which makes ___________ for growth considerably easier..
Protocol support – The ________ of current and future applications and
protocols is much easier on networks that follow the principles of _________ design because the underlying infrastructure is already ___________ organized.
Manageability – All the benefits listed here contribute to greater
manageability of the network.
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Functional Layers in Hierarchical network design Core layer
Provides optimal _________ between sites
Distribution layer Provides _________-based connectivity
Access layer Provides _______ and _____ access to
the network
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Redundant Path
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Core Layer Use routing features that optimize
packet _____________. Avoid using _________ or other
features that __________ the manipulation of packets.
Optimize for __________ and good manageability.
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Distribution Layer Include functions such as :
Address or area __________ __________ or workgroup access to the
core layer __________/_________ domain definition _________ LAN (VLAN) routing Any_______ transitions that need to occur Security
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Access-Layer Functions _________ bandwidth __________ bandwidth MAC-layer filtering _____segmentation
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Guidelines for Hierarchical Network Design Control the _________ of a
hierarchical enterprise network topology. Provide low and predicable _________ Predict routing path, ________, and
___________ requirement. Make troubleshooting and network
documentation easier.
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Guidelines (cont.) Strict control of network topology
at the access layer should be maintained. Avoid adding a ______ and Avoid ________ Core layer
DistributionLayer
Access Layer
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Guidelines (cont.) Design the __________ first.
More accurately perform _______ planning for the distribution and core layer.
Design each layer using ________ and hierarchical techniques and then plan the interconnections between layers based on your analysis of _________.
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Redundant Network Design Topologies
Meet requirements for network availability by _______ network links and interconnectivity devices. ________ paths _________________
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Each site mainly access its local ________.
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WANLink
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Traffic only Goes Up to Where Is ___________
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