- Core Layer. Core Layer coating on the core and spine (backbone) on a computer network that was formed. Core layer position in the network hierarchy is on the top layer. Core Layer is responsible for the traffic in computer networks. Core layer device handles the main backbone lines to an Internet Service Provider (ISP) and Internet networks. The main task of the core layer in the network hierarchy is to create a network design with high reliability, doing design for low latency and speed, and so forth. Devices that work in the core layer include core.vad.id machine, BSD Minded combined with Cisco Catalyst L3, Routers, Multiplexers and PBX.
- Distribution Layer. Layer distribution layer is located between the core layer and access layer. Distribution layer helps distinguish core in the core network with other networks. Distribution Layer defines the manufacturing rules for the network, such as routing updates, route summaries, VLAN traffic, and address aggregation. Some devices that are used in the Distribution Layer of the which include the Cisco Catalyst 6509, Nexus 7000, ASA 5500, Layer 3 Switch, Firewall, LAN Router, Bridge, Router, VPN Access Router, and Cisco Catalyst 6009 Layer 2 Core.
- Access Layer. Access Layer coating supply traffic to the network and perform network entry control. Access layer is very directly related to the computer network users Because the users who use the computer to access the network through a network access layer. Access layer acts as a "gateway" to the network. The function of the Access Layer includes shared bandwidth, switched bandwidth, MAC Layer Filtering, and Micro segmentation [NAT / subneting]. Some devices that are used in the Access Layer of the which include the Cisco 1900 series integrated services routers, the Cisco 2900 series integrated services routers, the Cisco 3900 series integrated services routers, and Cisco 800 series routers.
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