Power over Ethernet
access, distibution and core
the access, distribution, and core layers
From a network design standpoint: Core Distribution Access
Don't cheat!
SSID
A hierarchical network design includes the following three layers:The backbone (core) layer that provides optimal transport between sitesThe distribution layer that provides policy-based connectivityThe local-access layer that provides workgroup/user access to the networkhttp://docwiki.cisco.com/wiki/Internetwork_Design_Guide_--_Internetworking_Design_Basics#Function_of_the_Access_Layer
the SSID
authentication
Policies that adhere to the hierarchical network model design principles typically include segmentation of the network into distinct layers—core, distribution, and access. This structure promotes scalability, reliability, and efficient traffic management by centralizing routing at the core layer, distributing policies at the distribution layer, and managing endpoint access at the access layer. Additionally, these policies often emphasize redundancy and fault tolerance to ensure high availability and performance across the network. Overall, the focus is on clear separation of roles and responsibilities within each layer to optimize network functionality.
Hierarchical data model :Advantages- simplicity- data security- data integrity- efficiency- ease to add and delete recordDisadvantages- implement complexity- database management problem- lack of structural independence- programming complexity- implementation limitation- procedural access languageNetwork data model :Advantages- easy to access data- can handle more relationship types- data independence- data integrity- data independenceDisadvantages- system complexity- lack of structural independence- procedural access language
Hierarchical Sequential Access Method-is a method to use sequential access of database.
reduced contentio for bandwidth, reduced size of physical layout, siplification of management More Secure because access layer switches can be configured with various port security options that allows the devices to connect the network.